We describe a new genus of anomaline scarab, Anomalorhina (Coleoptera: Scarabaeidae: Rutelinae: A... more We describe a new genus of anomaline scarab, Anomalorhina (Coleoptera: Scarabaeidae: Rutelinae: Anomalini) from Costa Rica and Nicaragua. Anomala turrialbana Ohaus is transferred into this genus, and a new species, Anomalorhina osaensis, is described. Anomalorhina is characterized by the clypeal apex that is abruptly reßexed, the base of the frons that has prominent tubercles in males, the pronotum with a depressed fovea in males, and the pronotum with the apical bead posteriorly produced and V-shaped at the middle in females. We summarize the biological importance of the 16 genera of New World anomaline scarabs, including comments on agricultural pests, larvae, and natural history. We provide an overview and synopsis of each of the New World anomaline genera with comments on biology and characteristics for identiÞcation.
1. Throughout much of the tropics, habitat loss is increasing and intensifying on the unprotected... more 1. Throughout much of the tropics, habitat loss is increasing and intensifying on the unprotected land surrounding conservation areas. The influence of these land-use changes on biodiversity is poorly understood. This study used data on dung beetles, a taxonomic group widely acknowledged to be an effective ecological indicator of anthropogenic disturbance, to evaluate temporal changes in diversity inside a natural protected area. 2. Using data from quantitative sampling events over the last 35 years along with an exhaustive review of the information available in museums and the literature, we present evidence suggesting that the dung beetles community structure has shifted dramatically over time at La Selva Biological Station, Costa Rica. 3. To date, 50 dung beetle species have been reported from La Selva. Of these, 10 (20%) were consistently collected within the study timeframe while 21 species (42%) were uncommon. Our results indicate a tendency toward decreasing species richness and changes in species composition over time. 4. Analysis of the community structure revealed a decrease in diversity (H ′ ), an increase in dominance (D) and a decrease in evenness (J) over the 35-year period; all of which can be linked to an increase in the dominance of one species ( Onthophagus acuminatus ). These changes were also reflected in the proportional abundance of major species guilds. 5. Synthesis and applications . Despite the relatively low human impact within La Selva, this study suggests that the dung beetle community has changed as result of habitat loss in the surrounding landscape and the progressive increasing isolation of the reserve over the last 35 years. Our findings, together with studies of other biota in the reserve, indicate a worrying decline in the conservation value of La Selva in recent decades. This shift in the diversity and composition of native forest biota needs to be taken into account in future studies that continue to rely on La Selva as providing an intact baseline for comparative research. More importantly, we suggest that the size of the reserve may need to be increased if its ecological integrity is to be restored. This study provides further evidence that isolated protected areas may often fail to safeguard biodiversity in the long term, and that to be viable, conservation strategies urgently need to adopt a wider landscape perspective.
The following new species of dung beetles (Coleoptera: Scarabaeidae) are described: Canthidium ma... more The following new species of dung beetles (Coleoptera: Scarabaeidae) are described: Canthidium margaritae sp. nov. from Mexico and Canthon inusitatus sp. nov. from Costa Rica. Illustrations of the dorsal habitus and distribution maps are provided for both species.
Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published... more Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published on any non-marine arthropod taxon. Manuscripts considered for publication include, but are not limited to, systematic or taxonomic studies, revisions, nomenclatural changes, faunal studies, book reviews, phylogenetic analyses, biological or behavioral studies, etc. Insecta Mundi is widely distributed, and referenced or abstracted by several sources including the Zoological Record, CAB Abstracts, etc.
The following new species of dung beetles (Coleoptera: Scarabaeidae) from Costa Rica are describe... more The following new species of dung beetles (Coleoptera: Scarabaeidae) from Costa Rica are described: Ateuchus earthorum sp. nov. (Ateuchini) and Canthidium (Eucanthidium) darwini sp. nov. (Coprini). Illustrations of the dorsal habitus of the new species and a distribution map are provided, as well as a drawing of the internal sac of Ateuchus earthorum sp. nov.
Page 1. v <r :3S«* W^bltM^^Aí' . rj' r*&a... more Page 1. v <r :3S«* W^bltM^^Aí' . rj' r*' r**- pi" f "r^ ^ HDP BANCO MUNDIAL GEF > issrs?-- Page 2. CONTENIDO INTRODUCCIÓN Cómo son los escarabajos 9 Variedad de formas, tamaños y colores 13 Desde cuándo ...
Instituto Nacional de Biodiversidad (INBio). Disponible …, Jan 1, 2010
En este documento se hace un repaso de una serie de métodos y técnicas que se han empleado en may... more En este documento se hace un repaso de una serie de métodos y técnicas que se han empleado en mayor o menor grado en la recolección de Scarabaeoidea. Además se aporta la experiencia del autor en Costa Rica con la mayoría de estos métodos y técnicas.
We describe a new genus of anomaline scarab, Anomalorhina (Coleoptera: Scarabaeidae: Rutelinae: A... more We describe a new genus of anomaline scarab, Anomalorhina (Coleoptera: Scarabaeidae: Rutelinae: Anomalini) from Costa Rica and Nicaragua. Anomala turrialbana Ohaus is transferred into this genus, and a new species, Anomalorhina osaensis, is described. Anomalorhina is characterized by the clypeal apex that is abruptly reßexed, the base of the frons that has prominent tubercles in males, the pronotum with a depressed fovea in males, and the pronotum with the apical bead posteriorly produced and V-shaped at the middle in females. We summarize the biological importance of the 16 genera of New World anomaline scarabs, including comments on agricultural pests, larvae, and natural history. We provide an overview and synopsis of each of the New World anomaline genera with comments on biology and characteristics for identiÞcation.
1. Throughout much of the tropics, habitat loss is increasing and intensifying on the unprotected... more 1. Throughout much of the tropics, habitat loss is increasing and intensifying on the unprotected land surrounding conservation areas. The influence of these land-use changes on biodiversity is poorly understood. This study used data on dung beetles, a taxonomic group widely acknowledged to be an effective ecological indicator of anthropogenic disturbance, to evaluate temporal changes in diversity inside a natural protected area. 2. Using data from quantitative sampling events over the last 35 years along with an exhaustive review of the information available in museums and the literature, we present evidence suggesting that the dung beetles community structure has shifted dramatically over time at La Selva Biological Station, Costa Rica. 3. To date, 50 dung beetle species have been reported from La Selva. Of these, 10 (20%) were consistently collected within the study timeframe while 21 species (42%) were uncommon. Our results indicate a tendency toward decreasing species richness and changes in species composition over time. 4. Analysis of the community structure revealed a decrease in diversity (H ′ ), an increase in dominance (D) and a decrease in evenness (J) over the 35-year period; all of which can be linked to an increase in the dominance of one species ( Onthophagus acuminatus ). These changes were also reflected in the proportional abundance of major species guilds. 5. Synthesis and applications . Despite the relatively low human impact within La Selva, this study suggests that the dung beetle community has changed as result of habitat loss in the surrounding landscape and the progressive increasing isolation of the reserve over the last 35 years. Our findings, together with studies of other biota in the reserve, indicate a worrying decline in the conservation value of La Selva in recent decades. This shift in the diversity and composition of native forest biota needs to be taken into account in future studies that continue to rely on La Selva as providing an intact baseline for comparative research. More importantly, we suggest that the size of the reserve may need to be increased if its ecological integrity is to be restored. This study provides further evidence that isolated protected areas may often fail to safeguard biodiversity in the long term, and that to be viable, conservation strategies urgently need to adopt a wider landscape perspective.
The following new species of dung beetles (Coleoptera: Scarabaeidae) are described: Canthidium ma... more The following new species of dung beetles (Coleoptera: Scarabaeidae) are described: Canthidium margaritae sp. nov. from Mexico and Canthon inusitatus sp. nov. from Costa Rica. Illustrations of the dorsal habitus and distribution maps are provided for both species.
Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published... more Insecta Mundi is a journal primarily devoted to insect systematics, but articles can be published on any non-marine arthropod taxon. Manuscripts considered for publication include, but are not limited to, systematic or taxonomic studies, revisions, nomenclatural changes, faunal studies, book reviews, phylogenetic analyses, biological or behavioral studies, etc. Insecta Mundi is widely distributed, and referenced or abstracted by several sources including the Zoological Record, CAB Abstracts, etc.
The following new species of dung beetles (Coleoptera: Scarabaeidae) from Costa Rica are describe... more The following new species of dung beetles (Coleoptera: Scarabaeidae) from Costa Rica are described: Ateuchus earthorum sp. nov. (Ateuchini) and Canthidium (Eucanthidium) darwini sp. nov. (Coprini). Illustrations of the dorsal habitus of the new species and a distribution map are provided, as well as a drawing of the internal sac of Ateuchus earthorum sp. nov.
Page 1. v <r :3S«* W^bltM^^Aí' . rj' r*&a... more Page 1. v <r :3S«* W^bltM^^Aí' . rj' r*' r**- pi" f "r^ ^ HDP BANCO MUNDIAL GEF > issrs?-- Page 2. CONTENIDO INTRODUCCIÓN Cómo son los escarabajos 9 Variedad de formas, tamaños y colores 13 Desde cuándo ...
Instituto Nacional de Biodiversidad (INBio). Disponible …, Jan 1, 2010
En este documento se hace un repaso de una serie de métodos y técnicas que se han empleado en may... more En este documento se hace un repaso de una serie de métodos y técnicas que se han empleado en mayor o menor grado en la recolección de Scarabaeoidea. Además se aporta la experiencia del autor en Costa Rica con la mayoría de estos métodos y técnicas.
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