Skip to main content

Eduardo Hajdu

Universidade Federal do Rio de Janeiro (UFRJ), Museu Nacional, Invertebrados, Faculty Member

Followers

535

Following

23

Co-authors

21

Public Views

Associate Professor at the Federal University of Rio de Janeiro, Curator of the sponge collection (Porifera) at Museu Nacional. Research interestests: marine sponge taxonomy, biodiversity, biogeography and bioprospection.

less

Universidad Nacional Autónoma de México

Vicencio de la Cruz Francisco

Universidad Veracruzana

John N . A . Hooper

Queensland Museum

Cristiana Castello-Branco

Universidade Federal do Rio de Janeiro (UFRJ)

Universidade Federal do Cariri

Fernanda Fernandes Cavalcanti

University of East London

Gwen Robbins Schug

University of North Carolina at Greensboro

Gabriel Gutierrez-Alonso

University of Salamanca

Macquarie University

Interests

Uploads

Papers by Eduardo Hajdu

Antimicrobial and Antimycobacterial Activity of Cyclostellettamine Alkaloids from Sponge Pachychalina sp

Marine Drugs, Jan 20, 2006

Cyclostellettamines A-F (1-6) isolated from the sponge Pachychalina sp. and cyclostellettamines G... more Cyclostellettamines A-F (1-6) isolated from the sponge Pachychalina sp. and cyclostellettamines G-I, K and L (7-11) obtained by synthesis were evaluated in bioassays of antimicrobial activity against susceptible and antibiotic-resistant Staphylococcus aureus, Pseudomonas aeruginosa and antibiotic-susceptible Escherichia coli and Candida albicans, as well as in antimycobacterial activity against Mycobacterium tuberculosis H37Rv bioassays. The results obtained indicated that cyclostellettamines display different antimicrobial activity depending on the alkyl-chain size, suggesting that, if a mechanism-of action is implied, it is dependent on the distance between the two pyridinium moieties of cyclostellettamines.

Sulfated Meroterpenoids from the Brazilian Sponge <i>Callyspongia</i> sp. Are Inhibitors of the Antileishmaniasis Target Adenosine Phosphoribosyl Transferase

Journal of Organic Chemistry, May 2, 2006

Feature-Based Molecular Networking Discovery of Bromopyrrole Alkaloids from the Marine Sponge <i>Agelas dispar</i>

Journal of Natural Products, Apr 15, 2022

Investigation of the marine sponge Agelas dispar MeOH fractions using feature-based molecular net... more Investigation of the marine sponge Agelas dispar MeOH fractions using feature-based molecular networking, dereplication, and isolation led to the discovery of new bromopyrrole-derived metabolites. An in-house library of bromopyrrole alkaloids previously isolated from A. dispar and Dictyonella sp. was utilized, along with the investigation of an MS/MS fragmentation of these compounds. Our strategy led to the isolation and identification of the disparamides A-C (1-3), with a novel carbon skeleton. Additionally, new dispyrins B-F (4-8) and nagelamides H2 and H3 (9 and 10) and known nagelamide H (11), citrinamine B (12), ageliferin (13), bromoageliferin (14), and dibromoageliferin (15) were also isolated and identified by analysis of spectroscopic data. Analysis of MS/MS fragmentation data and molecular networking analysis indicated the presence of hymenidin (16), oroidin (17), dispacamide (18), monobromodispacamide (19), keramadine (20), longamide B (21), methyl ester of longamide B (22), hanishin (23), methyl ester of 3-debromolongamide B (24), and 3-debromohanishin (25). Antibacterial activity of ageliferin (13), bromoageliferin (14), and dibromoageliferin (15) was evaluated against susceptible and multi-drug-resistant ESKAPE pathogenic bacteria Klabsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterococcus faecalis. Dibromoageliferin (15) displayed the most potent antimicrobial activity against all tested susceptible and MDR strains. Compounds 13-15 presented no significant hemolytic activity up to 100 μM.

Two Unprecedented Dibromotyrosine-Derived Alkaloids from the Brazilian Endemic Marine Sponge <i>Aplysina </i><i>c</i><i>aissara</i>

Journal of Natural Products, May 1, 2002

Fluxes of the Amazon River plume nutrients and microbes into marine sponges

Science of The Total Environment

Three new Hymedesmia Bowerbank, 1864 (Demospongiae, Poecilosclerida, Hymedesmiidae) from the Southeast Pacific (Peru and Chile)

Zootaxa

Despite its 2000 km long shoreline, to date less than 50 sponge species have been reported from t... more Despite its 2000 km long shoreline, to date less than 50 sponge species have been reported from the entire Peruvian coast. A large collecting effort targeting marine sponges was undertaken between 2007 and 2009, yielding a comprehensive collection of nearly 900 samples, whose taxonomic study is underway. Three new species of Hymedesmiidae are presently described from the Peruvian coast, all belonging in Hymedesmia (Hymedesmia), one of which also found in Chile. Hymedesmia (H.) santarositae sp. nov., from Isla Santa Rosa (Paracas), is characterized by the presence of microstrongyles next to sigmas. Hymedesmia (H.) peruana sp. nov., from Isla Foca (Piura), is diagnosed by its three categories of acanthostyles, and single categories of tornotes and arcuate isochelae. Hymedesmia (H.) humboldti sp. nov., from Moquega and Arequipa regions in Peru, and Antofagasta and Atacama regions in Chile, is diagnosed by its two categories of acanthostyles, and single categories of (aniso)strongyles ...

Conservation status of the southernmost reef of the Amazon Reef System: the Parcel de Manuel Luís

Coral Reefs

The Parcel de Manuel Luís (PML) is located at the southern end of the Amazon Reef System, which c... more The Parcel de Manuel Luís (PML) is located at the southern end of the Amazon Reef System, which comprises the northernmost reef formations of the Brazilian biogeographical province. Its unique position and singular seascape make the PML an important stepping-stone for marine organisms between the Brazilian and Caribbean provinces. Yet, due to its distance from the shore, high tidal amplitude, and strong currents associated with a series of pinnacles exposed during low spring tides, the PML is one of the least studied reefs in the Western South Atlantic. Here, we integrated sessile benthic community data, fish assemblage surveys, and remote filming of fish interactions to establish the most complete community assessment of the PML reefs to date. In our surveys, we documented 78 sessile benthic taxa, with a taxonomic dominance of macroalgae (54 taxa), including two new occurrences of sponges for the North Brazilian Shelf, as well as four endemic species, such as the fire coral Millepora laboreli. The fish assemblage comprised 59 reef fish species, with biomass dominated mainly by large carnivorous species (e.g., groupers and snappers). Intra-and interspecific interactions were dominated by herbivorous fishes, particularly underpinned by grazing behavior and chasing by Topic Editor Mark Vermeij

Sponges present a core prokaryotic community stable across Tropical Western Atlantic

Science of The Total Environment

Sponges are among the earliest lineages of metazoans, with first fossil records dated back to 890... more Sponges are among the earliest lineages of metazoans, with first fossil records dated back to 890 million years ago. All sponge species present associations with microorganisms to some extension, which influence sponges' survival and adaptation. Sponge species can be divided into two categories, Low Microbial Abundance and High Microbial Abundance, depending on the abundance of the microbial community that they host. Monanchora arbuscula (a Low Microbial Abundance sponge species) and Xestospongia muta (a High Microbial Abundance sponge species) are sponges with widespread distribution in the Tropical Western Atlantic. Despite previous studies on the major features of these species, little is known whether M. arcuscula and X. muta prokaryotic communities are stable across vast geographic regions. We obtained a total of ~9.26 million 16S rRNA gene Illumina sequences for M. arbuscula samples collected at seven locations and for X. muta samples collected at three locations, corresponding to five ecoregions of the Caribbean and the Southwestern Atlantic (N = 105, 39 from M. arcuscula and 66 from X. muta). These samples reflected different ecological strategies for prokaryotic communities assembly, since the core prokaryotic communities of M. arbuscula are more heterotrophic and shared with different sources (corals, sponges, seawater, sediments), while X. muta has more significant photosynthetic prokaryotic communities, mainly outsourced from other sponges. Results of M. arbuscula and X. muta prokaryotic communities analysis demonstrate that both sponge species have core prokaryotic communities stable across a vast geographic area (> 8000 km), and the world's most notable coastal marine biogeographic filter, the Amazon River Mouth, in spite of the significant differences found among transient prokaryotic communities of both sponge species.

Taxonomy of Petrosiidae Van Soest, 1980 (Haplosclerida, Porifera) from Brazil

Zootaxa, 2021

Petrosiidae (Haplosclerida, Demospongiae) is characterized by the hard and friable consistency, a... more Petrosiidae (Haplosclerida, Demospongiae) is characterized by the hard and friable consistency, and an isotropic reticulated skeleton of oxeas/ strongyles. The Brazilian coast and oceanic islands harbor three out of four known genera of Petrosiidae: Neopetrosia de Laubenfels, 1949; Petrosia (Petrosia) Vosmaer, 1885 and Xestospongia de Laubenfels, 1932. A taxonomic survey of samples from several expeditions housed at the Porifera Collection of Museu Nacional, Universidade Federal do Rio de Janeiro, with additional comparative materials obtained from the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, and Universidade Federal de Pernambuco enabled the description of two new species: P. (P.) revizee sp. nov. and X. dorigo sp. nov. We also recorded a range extention for Neopetrosia proxima and Xestospongia muta, and Xestospongia grayi was synonymized with X. muta. Other species reported from the country are diagnosed, and an identification key for Petrosiidae from...

Sponges from Doumer Island, Antarctic Peninsula, with description of new species of Clathria (Axosuberites) Topsent, 1893 and Hymeniacidon Bowerbank, 1858, and a re-description of H. torquata Topsent, 1916

Zootaxa, 2020

Antarctic sponges were mainly studied from trawling or dredging (shallow and deep water) during p... more Antarctic sponges were mainly studied from trawling or dredging (shallow and deep water) during pioneering oceanographic expeditions carried out since the late 19th century. More recently, sponge collections by SCUBA diving have allowed the detection of species in more cryptic habitats such as rocky walls. In this study, we analyzed Antarctic sponges collected by SCUBA (in 2016 to 2018; shallower than 25 m) around Doumer Island (Palmer Archipelago, Western Antarctic Peninsula—WAP), where only five sponge species have been known. We gathered over 215 specimens, most part identified; 18 known species and one new species. Clathria (Axosuberites) retamalesi sp. nov., is set apart from its congeners on account of the combination of its habit, categories and dimensions of spicules. The East Antarctic material named as Hymeniacidon spec. (3397 m depth) from the Gauss scientific collection has been related to the shallow species H. torquata Topsent, 1916. We described H. torquata based in s...

Exotic species dominate marinas between the two most populated regions in the southwestern Atlantic Ocean

Marine Pollution Bulletin, 2019

Human occupation of coastal areas promotes the establishment of non-native species but informatio... more Human occupation of coastal areas promotes the establishment of non-native species but information on bioinvasions is usually biased toward the Northern Hemisphere. We assessed non-native species' importance in sessile communities at six marinas along the most urbanized area of the Southwestern Atlantic coastline. We found 67 species, of which 19 are exotic. The most frequent species was the exotic polychaete Branchiomma luctuosum, while the most abundant was the exotic bryozoan Schizoporella errata that monopolized the substrata in three marinas. Along with S. errata, the exotic polychaete Hydroides elegans and ascidian Styela plicata dominated space in the three remaining marinas, while native species were in general rare. We show that communities associated with artificial substrata along this Brazilian urbanized area are dominated by exotic species and that using abundance data along with species identity can improve our understanding of the importance of exotic species for the dynamics of biological communities.

Morphological and molecular systematics of the ‘Monanchora arbuscula complex’ (Poecilosclerida : Crambeidae), with the description of five new species and a biogeographic discussion of the genus in the Tropical Western Atlantic

Invertebrate Systematics, 2018

Monanchora Carter, 1883 is a genus of shallow-water marine sponges comprising 16 species distribu... more Monanchora Carter, 1883 is a genus of shallow-water marine sponges comprising 16 species distributed worldwide, two of them in the Tropical Western Atlantic (TWA): M. arbuscula (Duchassaing & Michelotti, 1864) and M. brasiliensis Esteves, Lerner, Lôbo-Hajdu & Hajdu, 2012. The former species stands out as one of the most variable demosponges, and is very similar in spicule complement and in secondary metabolite chemistry to the Mediterranean/eastern Atlantic Crambe crambe (Schmidt, 1862), type species of Crambe Vosmaer, 1880. The aim of the present study was to revise the genus Monanchora in the TWA. In addition, we critically analyse the monophyly of Crambe and Monanchora. Maximum Likelihood and Bayesian Inference analyses of 28S and 16S rRNA sequences of the latter genera, and a redescription of the ‘M. arbuscula complex’, revealed three species: M. arbuscula s.s., M. coccinea, sp. nov. and a new species of Acarnidae – Iophon parvachela, sp. nov. Three other new species from the TW...

Sponge richness on algae-dominated rocky reefs in the western Antarctic Peninsula and the Magellan Strait

Polar Research, 2016

Sponges are important components of high-latitude benthic communities, but their diversity and ab... more Sponges are important components of high-latitude benthic communities, but their diversity and abundance in algal-dominated rocky reefs has been underestimated because of the difficulty of in situ identification. Further, the influence of canopy-forming algae on sponge richness has been poorly studied in southern high-latitude rocky reefs compared to other latitudes. Here, we quantified taxon richness of sponges in algae-dominated rocky reefs at three sites in the western Antarctic Peninsula (62Á648 S) and two sites in the Magellan region (538 S). We found higher sponge richness at sites in Antarctica (15) than in Magallanes (8), with Antarctic sponge richness higher than that reported for Arctic algal beds and similar to that reported for temperate regions. Estimated sponge richness at our Antarctic sites highlights diverse sponge assemblages (16Á26 taxa) between 5 and 20 m that are typically dominated by macroalgae. Our results suggest that sponge assemblages associated with canopy-forming macroalgae on southern high-latitude reefs are more diverse than previously thought.

Checklist, diversity descriptors and selected descriptions of a highly diverse intertidal sponge (Porifera) assemblage at Costa do Descobrimento (Bahia, Brazil)

Zootaxa

Costa do Descobrimento is located in southern Bahia, Brazil, and only 22 species of sponges (Pori... more Costa do Descobrimento is located in southern Bahia, Brazil, and only 22 species of sponges (Porifera) were known from the area until now, despite its important reef formations. In the present study, we report a checklist of the sponges of Costa do Descobrimento and their distribution in the studied reefs, with several species illustrated in life. We also describe nine new sponge records for this region, some of which are new records for Brazil, or new records of species previously only poorly known. We present alpha and beta diversity indices and compare the sponge assemblage of the sampled locations. Four reefs were considered: two fringing reefs (Arraial D’Ajuda—AA and Coroa Vermelha / Mutá—CVM) and two offshore Municipal Marine Park “Parque Municipal Marinho— (P.M.M. Coroa Alta—CA and P.M.M. Recife de Fora—RF). A total of 229 specimens were collected (224 Demospongiae, 2 Homoscleromorpha and 3 Calcarea). These were classified in 101 morphotypes. Studied materials included repres...

Toward a Panbiogeography of the Seas: Sponge Phylogenies and General Tracks

Panbiogeography of the Seas, 1998

A modification of currently used quantitative panbiogeographic methods is applied here to the dis... more A modification of currently used quantitative panbiogeographic methods is applied here to the distribution of 154 marine demosponge species belonging to 9 monophyletic clades, namely the genera Acamus, Ceratopsion/ Thrinacophora, Didiscus, Myrmekioderma, Ptilocaulis/Reniochalina, and Rhabderemia, the Clathria procera spp. group, the Mycale with markedly curved anisochelae-I, and the fistulose iophonids. Species occurrences were simplified, constrained to 35 generally accepted areas of endemism of marine benthic organisms. The Cretaceous of Germany was added as a 36th area. The quantitative analysis was performed over minimal tracks (distribuon lines) only, that is, those connecting two areas of endemism, and no "clique-analysis" has been performed. Larger tracks were split into their smaller (=minimal) components, and tracks connecting localities within single areas of endemism were ignored. Track polarity was not estblished at this stage. Eighty-five distinct tracks were observed, comprising 32 of 36 possible areas. Areas not included were the Arctic Region, the Boreal western Atlanic, and the Boreal eastern and western Pacific. Thirty-three tracks are general, that is, they occurred two or more times (2-7), 16 of which connect contiguous areas. Only 20 areas occurred within the 33 general tracks, 16 of these possessing multiple (2-9) area relationships, which points to their composite origin ("nodes" in panbiogeographic terminology). Notable among these are Indonesia, which belongs to 9 general tracks, and the western Indian Ocean, belonging to 8 general tracks. The western Mediterranean, the West Indies, and northeastern Australia (Solanderian Province) belong to 5 general tracks each.

Seven new species of sponges (Porifera) from deep-sea coral mounds at Campos Basin (SW Atlantic)

Helgoland Marine Research, Dec 1, 2016

Deep-sea reefs and coral banks are increasingly known as highly biodiverse ecosystems where spong... more Deep-sea reefs and coral banks are increasingly known as highly biodiverse ecosystems where sponges constitute a significant proportion of builders and inhabitants. Albeit smaller in dimensions, Campos Basin coral mounds also harbor a rich associated fauna, whence only 16 species of sponges had been fully identified this far. Seven new species are described here, viz. Geodia garoupa sp. nov., Vulcanella stylifera sp. nov., Trachyteleia australis sp. nov., Echinostylinos brasiliensis sp. nov., Xestospongia kapne sp. nov., Sympagella tabachnicki sp. nov., and Leucopsacus barracuda sp. nov. Of the 24 species of sponges known from the area, only seven were found elsewhere too, thus suggesting a possible high endemism in Campos Basin. Nevertheless, the widespread occurrence of deep reef-framework building corals along a large sector of the Brazilian coast suggests these habitats and their associated fauna may be more widespread than currently appreciated. Echinostylinos patriciae nom. nov. is proposed for the New Zealand record of E. reticulatus.

<p><strong>New <em>Hamacantha</em> from Peru and resurrection of <em>Zygherpe</em> as subgenus (Demospongiae, Poecilosclerida, Hamacanthidae)</strong></p&gt

Zootaxa, Mar 4, 2015

Two species of Hamacantha with tylostyles are reported here for the Peruvian coast, namely H. des... more Two species of Hamacantha with tylostyles are reported here for the Peruvian coast, namely H. desmacelloides sp.nov. and H. hyaloderma. The former is the first species in the genus with apically microspined sigmas, similar to those known to occur in Neofibularia, and recently reported from genera Biemna, Desmacella, Rhabderemia and Sigmaxinella. Hamacantha hyaloderma was previously known from Mexico to Canada, and is here reported for the first time from the south east Pacific. The finding of a second species with tylostyles led us to reinstate subgenus Hamacantha (Zygherpe). The possible phylogenetic significance of apically microspined sigmas is discussed in view of recent findings on the basis of molecular data.

Deep-sea dives reveal an unexpected hexactinellid sponge garden on the Rio Grande Rise (SW Atlantic). A mimicking habitat?

Deep-sea Research Part Ii-topical Studies in Oceanography, Dec 1, 2017

Deep-sea dives reveal an unexpected hexactinellid sponge garden on the Rio Grande Rise (SW Atlant... more

Shallow Suberitida (Porifera, Demospongiae) from Peru

Zootaxa

This study describes 81 specimens belonging to Suberitida, collected during the projects Esponjas... more This study describes 81 specimens belonging to Suberitida, collected during the projects Esponjas del Perú (ESPER), Esponjas da América do Sul (EsponjAS) and Semilla UCSUR 2019 (Demospongiae) along the coast of Peru, down to 30 m depth. Using morphological analyses, eight species were identified, one of which is new to science: Halichondria (H.) cristata, H. (H.) prostrata, Hymeniacidon perlevis, Johannesia reticulosa, Plicatellopsis expansa, Suberites aff. latus, Terpios cf. granulosus and Suberites inti sp. nov. Halichondria (H.) cristata, originally from Tierra del Fuego (SW Atlantic), was found widely distributed along the coast of Peru (06° S–14° S). The Magellanican H. (H.) prostrata and the formerly Chilean endemic P. expansa are extended up to Central Peru (12° S). Hymeniacidon perlevis, which presents a highly variable morphology (colour, shape, and spicule size), is firstly reported from the SE Pacific and its continuous occurrence in Peru (04° S–17° S) should be monitored...

Microbiome diversity from sponges biogeographically distributed between South America and Antarctica

Science of The Total Environment

Antimicrobial and Antimycobacterial Activity of Cyclostellettamine Alkaloids from Sponge Pachychalina sp

Marine Drugs, Jan 20, 2006

Cyclostellettamines A-F (1-6) isolated from the sponge Pachychalina sp. and cyclostellettamines G... more Cyclostellettamines A-F (1-6) isolated from the sponge Pachychalina sp. and cyclostellettamines G-I, K and L (7-11) obtained by synthesis were evaluated in bioassays of antimicrobial activity against susceptible and antibiotic-resistant Staphylococcus aureus, Pseudomonas aeruginosa and antibiotic-susceptible Escherichia coli and Candida albicans, as well as in antimycobacterial activity against Mycobacterium tuberculosis H37Rv bioassays. The results obtained indicated that cyclostellettamines display different antimicrobial activity depending on the alkyl-chain size, suggesting that, if a mechanism-of action is implied, it is dependent on the distance between the two pyridinium moieties of cyclostellettamines.

Sulfated Meroterpenoids from the Brazilian Sponge <i>Callyspongia</i> sp. Are Inhibitors of the Antileishmaniasis Target Adenosine Phosphoribosyl Transferase

Journal of Organic Chemistry, May 2, 2006

Feature-Based Molecular Networking Discovery of Bromopyrrole Alkaloids from the Marine Sponge <i>Agelas dispar</i>

Journal of Natural Products, Apr 15, 2022

Investigation of the marine sponge Agelas dispar MeOH fractions using feature-based molecular net... more Investigation of the marine sponge Agelas dispar MeOH fractions using feature-based molecular networking, dereplication, and isolation led to the discovery of new bromopyrrole-derived metabolites. An in-house library of bromopyrrole alkaloids previously isolated from A. dispar and Dictyonella sp. was utilized, along with the investigation of an MS/MS fragmentation of these compounds. Our strategy led to the isolation and identification of the disparamides A-C (1-3), with a novel carbon skeleton. Additionally, new dispyrins B-F (4-8) and nagelamides H2 and H3 (9 and 10) and known nagelamide H (11), citrinamine B (12), ageliferin (13), bromoageliferin (14), and dibromoageliferin (15) were also isolated and identified by analysis of spectroscopic data. Analysis of MS/MS fragmentation data and molecular networking analysis indicated the presence of hymenidin (16), oroidin (17), dispacamide (18), monobromodispacamide (19), keramadine (20), longamide B (21), methyl ester of longamide B (22), hanishin (23), methyl ester of 3-debromolongamide B (24), and 3-debromohanishin (25). Antibacterial activity of ageliferin (13), bromoageliferin (14), and dibromoageliferin (15) was evaluated against susceptible and multi-drug-resistant ESKAPE pathogenic bacteria Klabsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Acinetobacter baumannii, and Enterococcus faecalis. Dibromoageliferin (15) displayed the most potent antimicrobial activity against all tested susceptible and MDR strains. Compounds 13-15 presented no significant hemolytic activity up to 100 μM.

Two Unprecedented Dibromotyrosine-Derived Alkaloids from the Brazilian Endemic Marine Sponge <i>Aplysina </i><i>c</i><i>aissara</i>

Journal of Natural Products, May 1, 2002

Fluxes of the Amazon River plume nutrients and microbes into marine sponges

Science of The Total Environment

Three new Hymedesmia Bowerbank, 1864 (Demospongiae, Poecilosclerida, Hymedesmiidae) from the Southeast Pacific (Peru and Chile)

Zootaxa

Despite its 2000 km long shoreline, to date less than 50 sponge species have been reported from t... more Despite its 2000 km long shoreline, to date less than 50 sponge species have been reported from the entire Peruvian coast. A large collecting effort targeting marine sponges was undertaken between 2007 and 2009, yielding a comprehensive collection of nearly 900 samples, whose taxonomic study is underway. Three new species of Hymedesmiidae are presently described from the Peruvian coast, all belonging in Hymedesmia (Hymedesmia), one of which also found in Chile. Hymedesmia (H.) santarositae sp. nov., from Isla Santa Rosa (Paracas), is characterized by the presence of microstrongyles next to sigmas. Hymedesmia (H.) peruana sp. nov., from Isla Foca (Piura), is diagnosed by its three categories of acanthostyles, and single categories of tornotes and arcuate isochelae. Hymedesmia (H.) humboldti sp. nov., from Moquega and Arequipa regions in Peru, and Antofagasta and Atacama regions in Chile, is diagnosed by its two categories of acanthostyles, and single categories of (aniso)strongyles ...

Conservation status of the southernmost reef of the Amazon Reef System: the Parcel de Manuel Luís

Coral Reefs

The Parcel de Manuel Luís (PML) is located at the southern end of the Amazon Reef System, which c... more The Parcel de Manuel Luís (PML) is located at the southern end of the Amazon Reef System, which comprises the northernmost reef formations of the Brazilian biogeographical province. Its unique position and singular seascape make the PML an important stepping-stone for marine organisms between the Brazilian and Caribbean provinces. Yet, due to its distance from the shore, high tidal amplitude, and strong currents associated with a series of pinnacles exposed during low spring tides, the PML is one of the least studied reefs in the Western South Atlantic. Here, we integrated sessile benthic community data, fish assemblage surveys, and remote filming of fish interactions to establish the most complete community assessment of the PML reefs to date. In our surveys, we documented 78 sessile benthic taxa, with a taxonomic dominance of macroalgae (54 taxa), including two new occurrences of sponges for the North Brazilian Shelf, as well as four endemic species, such as the fire coral Millepora laboreli. The fish assemblage comprised 59 reef fish species, with biomass dominated mainly by large carnivorous species (e.g., groupers and snappers). Intra-and interspecific interactions were dominated by herbivorous fishes, particularly underpinned by grazing behavior and chasing by Topic Editor Mark Vermeij

Sponges present a core prokaryotic community stable across Tropical Western Atlantic

Science of The Total Environment

Sponges are among the earliest lineages of metazoans, with first fossil records dated back to 890... more Sponges are among the earliest lineages of metazoans, with first fossil records dated back to 890 million years ago. All sponge species present associations with microorganisms to some extension, which influence sponges' survival and adaptation. Sponge species can be divided into two categories, Low Microbial Abundance and High Microbial Abundance, depending on the abundance of the microbial community that they host. Monanchora arbuscula (a Low Microbial Abundance sponge species) and Xestospongia muta (a High Microbial Abundance sponge species) are sponges with widespread distribution in the Tropical Western Atlantic. Despite previous studies on the major features of these species, little is known whether M. arcuscula and X. muta prokaryotic communities are stable across vast geographic regions. We obtained a total of ~9.26 million 16S rRNA gene Illumina sequences for M. arbuscula samples collected at seven locations and for X. muta samples collected at three locations, corresponding to five ecoregions of the Caribbean and the Southwestern Atlantic (N = 105, 39 from M. arcuscula and 66 from X. muta). These samples reflected different ecological strategies for prokaryotic communities assembly, since the core prokaryotic communities of M. arbuscula are more heterotrophic and shared with different sources (corals, sponges, seawater, sediments), while X. muta has more significant photosynthetic prokaryotic communities, mainly outsourced from other sponges. Results of M. arbuscula and X. muta prokaryotic communities analysis demonstrate that both sponge species have core prokaryotic communities stable across a vast geographic area (> 8000 km), and the world's most notable coastal marine biogeographic filter, the Amazon River Mouth, in spite of the significant differences found among transient prokaryotic communities of both sponge species.

Taxonomy of Petrosiidae Van Soest, 1980 (Haplosclerida, Porifera) from Brazil

Zootaxa, 2021

Petrosiidae (Haplosclerida, Demospongiae) is characterized by the hard and friable consistency, a... more Petrosiidae (Haplosclerida, Demospongiae) is characterized by the hard and friable consistency, and an isotropic reticulated skeleton of oxeas/ strongyles. The Brazilian coast and oceanic islands harbor three out of four known genera of Petrosiidae: Neopetrosia de Laubenfels, 1949; Petrosia (Petrosia) Vosmaer, 1885 and Xestospongia de Laubenfels, 1932. A taxonomic survey of samples from several expeditions housed at the Porifera Collection of Museu Nacional, Universidade Federal do Rio de Janeiro, with additional comparative materials obtained from the Museu de Ciências Naturais, Fundação Zoobotânica do Rio Grande do Sul, and Universidade Federal de Pernambuco enabled the description of two new species: P. (P.) revizee sp. nov. and X. dorigo sp. nov. We also recorded a range extention for Neopetrosia proxima and Xestospongia muta, and Xestospongia grayi was synonymized with X. muta. Other species reported from the country are diagnosed, and an identification key for Petrosiidae from...

Sponges from Doumer Island, Antarctic Peninsula, with description of new species of Clathria (Axosuberites) Topsent, 1893 and Hymeniacidon Bowerbank, 1858, and a re-description of H. torquata Topsent, 1916

Zootaxa, 2020

Antarctic sponges were mainly studied from trawling or dredging (shallow and deep water) during p... more Antarctic sponges were mainly studied from trawling or dredging (shallow and deep water) during pioneering oceanographic expeditions carried out since the late 19th century. More recently, sponge collections by SCUBA diving have allowed the detection of species in more cryptic habitats such as rocky walls. In this study, we analyzed Antarctic sponges collected by SCUBA (in 2016 to 2018; shallower than 25 m) around Doumer Island (Palmer Archipelago, Western Antarctic Peninsula—WAP), where only five sponge species have been known. We gathered over 215 specimens, most part identified; 18 known species and one new species. Clathria (Axosuberites) retamalesi sp. nov., is set apart from its congeners on account of the combination of its habit, categories and dimensions of spicules. The East Antarctic material named as Hymeniacidon spec. (3397 m depth) from the Gauss scientific collection has been related to the shallow species H. torquata Topsent, 1916. We described H. torquata based in s...

Exotic species dominate marinas between the two most populated regions in the southwestern Atlantic Ocean

Marine Pollution Bulletin, 2019

Human occupation of coastal areas promotes the establishment of non-native species but informatio... more Human occupation of coastal areas promotes the establishment of non-native species but information on bioinvasions is usually biased toward the Northern Hemisphere. We assessed non-native species' importance in sessile communities at six marinas along the most urbanized area of the Southwestern Atlantic coastline. We found 67 species, of which 19 are exotic. The most frequent species was the exotic polychaete Branchiomma luctuosum, while the most abundant was the exotic bryozoan Schizoporella errata that monopolized the substrata in three marinas. Along with S. errata, the exotic polychaete Hydroides elegans and ascidian Styela plicata dominated space in the three remaining marinas, while native species were in general rare. We show that communities associated with artificial substrata along this Brazilian urbanized area are dominated by exotic species and that using abundance data along with species identity can improve our understanding of the importance of exotic species for the dynamics of biological communities.

Morphological and molecular systematics of the ‘Monanchora arbuscula complex’ (Poecilosclerida : Crambeidae), with the description of five new species and a biogeographic discussion of the genus in the Tropical Western Atlantic

Invertebrate Systematics, 2018

Monanchora Carter, 1883 is a genus of shallow-water marine sponges comprising 16 species distribu... more Monanchora Carter, 1883 is a genus of shallow-water marine sponges comprising 16 species distributed worldwide, two of them in the Tropical Western Atlantic (TWA): M. arbuscula (Duchassaing & Michelotti, 1864) and M. brasiliensis Esteves, Lerner, Lôbo-Hajdu & Hajdu, 2012. The former species stands out as one of the most variable demosponges, and is very similar in spicule complement and in secondary metabolite chemistry to the Mediterranean/eastern Atlantic Crambe crambe (Schmidt, 1862), type species of Crambe Vosmaer, 1880. The aim of the present study was to revise the genus Monanchora in the TWA. In addition, we critically analyse the monophyly of Crambe and Monanchora. Maximum Likelihood and Bayesian Inference analyses of 28S and 16S rRNA sequences of the latter genera, and a redescription of the ‘M. arbuscula complex’, revealed three species: M. arbuscula s.s., M. coccinea, sp. nov. and a new species of Acarnidae – Iophon parvachela, sp. nov. Three other new species from the TW...

Sponge richness on algae-dominated rocky reefs in the western Antarctic Peninsula and the Magellan Strait

Polar Research, 2016

Sponges are important components of high-latitude benthic communities, but their diversity and ab... more Sponges are important components of high-latitude benthic communities, but their diversity and abundance in algal-dominated rocky reefs has been underestimated because of the difficulty of in situ identification. Further, the influence of canopy-forming algae on sponge richness has been poorly studied in southern high-latitude rocky reefs compared to other latitudes. Here, we quantified taxon richness of sponges in algae-dominated rocky reefs at three sites in the western Antarctic Peninsula (62Á648 S) and two sites in the Magellan region (538 S). We found higher sponge richness at sites in Antarctica (15) than in Magallanes (8), with Antarctic sponge richness higher than that reported for Arctic algal beds and similar to that reported for temperate regions. Estimated sponge richness at our Antarctic sites highlights diverse sponge assemblages (16Á26 taxa) between 5 and 20 m that are typically dominated by macroalgae. Our results suggest that sponge assemblages associated with canopy-forming macroalgae on southern high-latitude reefs are more diverse than previously thought.

Checklist, diversity descriptors and selected descriptions of a highly diverse intertidal sponge (Porifera) assemblage at Costa do Descobrimento (Bahia, Brazil)

Zootaxa

Costa do Descobrimento is located in southern Bahia, Brazil, and only 22 species of sponges (Pori... more Costa do Descobrimento is located in southern Bahia, Brazil, and only 22 species of sponges (Porifera) were known from the area until now, despite its important reef formations. In the present study, we report a checklist of the sponges of Costa do Descobrimento and their distribution in the studied reefs, with several species illustrated in life. We also describe nine new sponge records for this region, some of which are new records for Brazil, or new records of species previously only poorly known. We present alpha and beta diversity indices and compare the sponge assemblage of the sampled locations. Four reefs were considered: two fringing reefs (Arraial D’Ajuda—AA and Coroa Vermelha / Mutá—CVM) and two offshore Municipal Marine Park “Parque Municipal Marinho— (P.M.M. Coroa Alta—CA and P.M.M. Recife de Fora—RF). A total of 229 specimens were collected (224 Demospongiae, 2 Homoscleromorpha and 3 Calcarea). These were classified in 101 morphotypes. Studied materials included repres...

Toward a Panbiogeography of the Seas: Sponge Phylogenies and General Tracks

Panbiogeography of the Seas, 1998

A modification of currently used quantitative panbiogeographic methods is applied here to the dis... more A modification of currently used quantitative panbiogeographic methods is applied here to the distribution of 154 marine demosponge species belonging to 9 monophyletic clades, namely the genera Acamus, Ceratopsion/ Thrinacophora, Didiscus, Myrmekioderma, Ptilocaulis/Reniochalina, and Rhabderemia, the Clathria procera spp. group, the Mycale with markedly curved anisochelae-I, and the fistulose iophonids. Species occurrences were simplified, constrained to 35 generally accepted areas of endemism of marine benthic organisms. The Cretaceous of Germany was added as a 36th area. The quantitative analysis was performed over minimal tracks (distribuon lines) only, that is, those connecting two areas of endemism, and no "clique-analysis" has been performed. Larger tracks were split into their smaller (=minimal) components, and tracks connecting localities within single areas of endemism were ignored. Track polarity was not estblished at this stage. Eighty-five distinct tracks were observed, comprising 32 of 36 possible areas. Areas not included were the Arctic Region, the Boreal western Atlanic, and the Boreal eastern and western Pacific. Thirty-three tracks are general, that is, they occurred two or more times (2-7), 16 of which connect contiguous areas. Only 20 areas occurred within the 33 general tracks, 16 of these possessing multiple (2-9) area relationships, which points to their composite origin ("nodes" in panbiogeographic terminology). Notable among these are Indonesia, which belongs to 9 general tracks, and the western Indian Ocean, belonging to 8 general tracks. The western Mediterranean, the West Indies, and northeastern Australia (Solanderian Province) belong to 5 general tracks each.

Seven new species of sponges (Porifera) from deep-sea coral mounds at Campos Basin (SW Atlantic)

Helgoland Marine Research, Dec 1, 2016

Deep-sea reefs and coral banks are increasingly known as highly biodiverse ecosystems where spong... more Deep-sea reefs and coral banks are increasingly known as highly biodiverse ecosystems where sponges constitute a significant proportion of builders and inhabitants. Albeit smaller in dimensions, Campos Basin coral mounds also harbor a rich associated fauna, whence only 16 species of sponges had been fully identified this far. Seven new species are described here, viz. Geodia garoupa sp. nov., Vulcanella stylifera sp. nov., Trachyteleia australis sp. nov., Echinostylinos brasiliensis sp. nov., Xestospongia kapne sp. nov., Sympagella tabachnicki sp. nov., and Leucopsacus barracuda sp. nov. Of the 24 species of sponges known from the area, only seven were found elsewhere too, thus suggesting a possible high endemism in Campos Basin. Nevertheless, the widespread occurrence of deep reef-framework building corals along a large sector of the Brazilian coast suggests these habitats and their associated fauna may be more widespread than currently appreciated. Echinostylinos patriciae nom. nov. is proposed for the New Zealand record of E. reticulatus.

<p><strong>New <em>Hamacantha</em> from Peru and resurrection of <em>Zygherpe</em> as subgenus (Demospongiae, Poecilosclerida, Hamacanthidae)</strong></p&gt

Zootaxa, Mar 4, 2015

Two species of Hamacantha with tylostyles are reported here for the Peruvian coast, namely H. des... more Two species of Hamacantha with tylostyles are reported here for the Peruvian coast, namely H. desmacelloides sp.nov. and H. hyaloderma. The former is the first species in the genus with apically microspined sigmas, similar to those known to occur in Neofibularia, and recently reported from genera Biemna, Desmacella, Rhabderemia and Sigmaxinella. Hamacantha hyaloderma was previously known from Mexico to Canada, and is here reported for the first time from the south east Pacific. The finding of a second species with tylostyles led us to reinstate subgenus Hamacantha (Zygherpe). The possible phylogenetic significance of apically microspined sigmas is discussed in view of recent findings on the basis of molecular data.

Deep-sea dives reveal an unexpected hexactinellid sponge garden on the Rio Grande Rise (SW Atlantic). A mimicking habitat?

Deep-sea Research Part Ii-topical Studies in Oceanography, Dec 1, 2017

Deep-sea dives reveal an unexpected hexactinellid sponge garden on the Rio Grande Rise (SW Atlant... more

Shallow Suberitida (Porifera, Demospongiae) from Peru

Zootaxa

This study describes 81 specimens belonging to Suberitida, collected during the projects Esponjas... more This study describes 81 specimens belonging to Suberitida, collected during the projects Esponjas del Perú (ESPER), Esponjas da América do Sul (EsponjAS) and Semilla UCSUR 2019 (Demospongiae) along the coast of Peru, down to 30 m depth. Using morphological analyses, eight species were identified, one of which is new to science: Halichondria (H.) cristata, H. (H.) prostrata, Hymeniacidon perlevis, Johannesia reticulosa, Plicatellopsis expansa, Suberites aff. latus, Terpios cf. granulosus and Suberites inti sp. nov. Halichondria (H.) cristata, originally from Tierra del Fuego (SW Atlantic), was found widely distributed along the coast of Peru (06° S–14° S). The Magellanican H. (H.) prostrata and the formerly Chilean endemic P. expansa are extended up to Central Peru (12° S). Hymeniacidon perlevis, which presents a highly variable morphology (colour, shape, and spicule size), is firstly reported from the SE Pacific and its continuous occurrence in Peru (04° S–17° S) should be monitored...

Microbiome diversity from sponges biogeographically distributed between South America and Antarctica

Science of The Total Environment