... 291 Jérôme Prieto The Miocene insectivores and marsupial from Affalterbach (North Alpine Fore... more ... 291 Jérôme Prieto The Miocene insectivores and marsupial from Affalterbach (North Alpine Foreland Basin, Germany) 297 ... The Giganteuston Member is named after the common occurrence of the large-sized belemnite species Megateuthis giganteus (Schlotheim). ...
A b s t r a c t The lithological succession, ammonite faunas, and chrono-/biostratigraphy of the ... more A b s t r a c t The lithological succession, ammonite faunas, and chrono-/biostratigraphy of the former iron-mine at the Kahlenberg near Ringsheim (Upper Rhine Valley) are described with emphasis on strata of the Laeviuscula and Sauzei zones (Lower Bajocian). Two new ammonite faunal horizons are recognized in the Laeviuscula Zone, that of Pelekodites macer (Trigonalis Subzone) and Witchellia glauca (Laeviuscula Subzone). Between them is the faunal horizon of Pseudoshirbuirnia stephani which is also known from Swabia (Trigonalis Subzone). In the Sauzei Zone one new faunal horizon is described, that of Emileia pseudocontrahens, between that of Otoites dilatus below and Stephanoceras macrum above. The "γ-Tone" at Gingen/Fils (Eastern Swabian Alb) include the faunal horizon of Witchellia spinifera. The faunal horizons of the Laeviuscula and Sauzei zones of southern Germany and southern England are correlated. The microfauna is briefly described.
Stephanoceras umbilicum ist die Index-Art des in Mitteleuropa gebräuchlichen umbilicum-Horizonts ... more Stephanoceras umbilicum ist die Index-Art des in Mitteleuropa gebräuchlichen umbilicum-Horizonts (Humphriesianum-Subzone, Humphriesianum-Zone, Unter-Bajocium, Mittel-Jura). Aus dem umbilicum-Horizont an der Typus-Lokalität in Essingen bei Aalen wird die Stephanoceraten-Fauna beschrieben. Diese lässt sich morphospezifisch den Arten S. umbilicum, S. mutabile und S. scalare zuordnen. Der Aufschluss von Essingen wird mit weiteren Fundorten in Süd-und Norddeutschland, Frankreich und Südengland korreliert. Für S. umbilicum (Quenstedt, 1886) und S. mutabile (Quenstedt, 1886) werden Lectotypen designiert. Um Fehlkorrelationen zu vermeiden, sollte eine Umbilicum-(Sub-)Zone keine Verwendung finden.
A Lower Bajocian section from southern Neuquén Basin (Argentina), with 3 faunal horizons (sphaero... more A Lower Bajocian section from southern Neuquén Basin (Argentina), with 3 faunal horizons (sphaeroceroides, submicrostoma and giebeli horizons) in the Singularis and Giebeli zones, is described. The Giebeli Zone is relatively thick in contrast with the section at Paso del Espinacito. The ammonite species Chondromileia submicrostoma (Gottsche) is quite variable and consists of large specimens. For the first time well preserved and complete macroconch specimens of Emileia multiformis (Gottsche) are described. It is shown that the lithostratigraphic and biostratigraphic boundaries are not coincident in the studied section.
We present a modern revision of the dimorphic ammonite pair Strigoceras QUENSTEDT, 1886/Cadomocer... more We present a modern revision of the dimorphic ammonite pair Strigoceras QUENSTEDT, 1886/Cadomoceras MUNIER-CHALMAS, 1892 from the Middle Jurassic. The stratigraphically oldest hitherto known chronospecies of Strigoceras, S. praenuntium (BUCKMAN) appears in the Middle Aalenian as an extreme rarity. Records of the microconch genus Cadomoceras re- main unknown from strata older than Early Bajocian, but otherwise its stratigraphical range corresponds well with that of the macroconchs. The genus probably became extinct in the Early Bathonian (Zigzag Zone). The youngest known Strigoceras is S. callomoni n. sp. descri- bed here from the Macrescens Subzone of the Early Bathonian. Another new strigoceratid species, Granulochetoceras oppeliisculptum n. sp., is recorded by a single specimen from the early Garantiana Zone of eastern Spain, representing an interesting phyletic link between Stri- goceras QUENSTEDT, 1886 and Granulochetoceras GEYER, 1960. We include a brief review of the latter ge...
A new stephanoceratid ammonite species, Riccardiceras richardsoni n. sp. is described from the Lo... more A new stephanoceratid ammonite species, Riccardiceras richardsoni n. sp. is described from the Lower Bajocian of S England and SW Germany. The holotype comes from the Inferior Oolite, Laeviuscula Zone, Sayni Subzone (ammonite faunal horizon Bj-7a) of Bruton, So- merset. Another homoeomorphic stephanoceratid is reported from the same bed and differs from Riccardiceras by its coronate-cadiconic juvenile stage. It is placed in a new genus, Westermannites n. g. (type species: Coeloceras limatum POMPECKJ), and a new species, Wester- mannites brutonensis n. sp., is erected. A cf.-record of Riccardiceras richardsoni n. sp. from SW Germany is reported from the "Unterer Wedelsandstein" Member of the Wutach area. Its stratigraphical level is a calcareous arenite bed within the Ovale Zone.
A succession of 4 ammonite faunal horizons is described in detail from the Lower Bajocian (Ovale ... more A succession of 4 ammonite faunal horizons is described in detail from the Lower Bajocian (Ovale and Laeviuscula zones) of eastern Swabia. Their ammonite faunas are described and reviewed. A new classification is proposed of the Sonniniidae BUCKMAN, 1892 in which the genera Sonninia BAYLE, 1879, Shirbuirnia BUCKMAN, 1910, Witchellia BUCKMAN, 1889, and Pseudoshirbuirnia n. gen. are regarded as independent phyletic strands. Fissilobiceras BUCK- MAN, 1919 is assigned to Hammatoceratidae BUCKMAN, 1887. A new genus, Pseudoshirbuir- nia (type species Amaltheus? stephani BUCKMAN, 1883) with a new species, Pseudoshirbuirnia oechslei n. sp. (= Sonninia tessoniana tessoniana (D'ORBIGNY) in OECHSLE) are erected. To sta- bilize the use of species names lectotypes are formally designated for Witchellia jugifera (WAAGEN), Shirbuirnia gingensis (WAAGEN), Sonninia (Euhoploceras) adicra (WAAGEN), and S. (Eu.) costosa (QUENSTEDT). The type horizons of some important ammonite taxa intro- duced by ...
... Page 3. Editors-in-Chief/Herausgeber: Winfried Werner, Michael Krings Production and Layout/B... more ... Page 3. Editors-in-Chief/Herausgeber: Winfried Werner, Michael Krings Production and Layout/Bildbearbeitung und Layout: Martine Focke, Lydia Geißler, Manuela Schellenberger Bayerische Staatssammlung für Paläontologie und Geologie Richard-Wagner-Str. ...
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2014
The stratigraphy of part of the Inferior Oolite Formation at Frogden Quarry, Dorset, U.K. is revi... more The stratigraphy of part of the Inferior Oolite Formation at Frogden Quarry, Dorset, U.K. is revised based on new ammonite evidence. In the Lower Inferior Oolite Formation the Oborne Ironshot Member is erected to include beds 4 to 5 of the section (Sauzei and Humphriesianum zones). Oborne is designated as the type locality. For part of the Upper Inferior Oolite Formation of the Inferior Oolite Group in the Sherborne area of Dorset a new formal lithostratigraphical scheme is proposed, with the Sherborne Limestone Member at the base (including the basal Acanthothyris Beds, Sherborne Building Stone Beds and Redhole Lane Beds) followed by the Combe Limestone Member. The Sherborne Limestone Member is shown to belong to one ammonite faunal horizon, Bj-24a Garantiana dichotoma, of the Garantiana Zone. In the Combe Limestone Member a new ammonite faunal horizon Bj-24b Garantiana subgaranti is described for the first time in England. Faunal horizons Bj-25 Garantiana tetragona and Bj-26 Parkinsonia rarecostata are confirmed in the Sherborne area. A mechanism is suggested for the deposition of the Sherborne Limestone Member.
A b s t r a c t The classical outcrop of the Paso del Espinacito (San Juan Province, Argentina), ... more A b s t r a c t The classical outcrop of the Paso del Espinacito (San Juan Province, Argentina), wherefrom and TORNQUIST (1898) described many Early Bajocian ammonite species -some of them later became type species of new genera -was restudied by one of us (A. v. H.) in 1968. The newly collected ammonites sampled bed-by-bed are described and illustrated. The fi nds of many topotypes for most of the GOTTSCHE and TORNQUIST taxa allows a reconstruction of their type horizons. The strata are subdivided in the standard chronozones of the Andean Province: the Puchenquia malarguensis Zone in the Aalenian and the Pseudotoites singularis and Chondromileia giebeli zones in the Lower Bajocian. The Singularis Zone is subdivided into two new subzones: the Fissilobiceras zitteli Subzone in the lower part with the Pseudotoites singularis horizon and the Sonninia altecostata Subzone in the upper part with the Pseudotoites sphaeroceroides horizon. The Giebeli Zone is subdivided into their standard subzones: the Chondromileia submicrostoma Subzone with the horizon of Ch. submicrostoma and the Emileia mulitiformis Subzone with the Ch. giebeli horizon. These zones and subzones of the Andean Province are tentatively correlated with the standard zones of the Northwest-European Province.
... 291 Jérôme Prieto The Miocene insectivores and marsupial from Affalterbach (North Alpine Fore... more ... 291 Jérôme Prieto The Miocene insectivores and marsupial from Affalterbach (North Alpine Foreland Basin, Germany) 297 ... The Giganteuston Member is named after the common occurrence of the large-sized belemnite species Megateuthis giganteus (Schlotheim). ...
A b s t r a c t The lithological succession, ammonite faunas, and chrono-/biostratigraphy of the ... more A b s t r a c t The lithological succession, ammonite faunas, and chrono-/biostratigraphy of the former iron-mine at the Kahlenberg near Ringsheim (Upper Rhine Valley) are described with emphasis on strata of the Laeviuscula and Sauzei zones (Lower Bajocian). Two new ammonite faunal horizons are recognized in the Laeviuscula Zone, that of Pelekodites macer (Trigonalis Subzone) and Witchellia glauca (Laeviuscula Subzone). Between them is the faunal horizon of Pseudoshirbuirnia stephani which is also known from Swabia (Trigonalis Subzone). In the Sauzei Zone one new faunal horizon is described, that of Emileia pseudocontrahens, between that of Otoites dilatus below and Stephanoceras macrum above. The "γ-Tone" at Gingen/Fils (Eastern Swabian Alb) include the faunal horizon of Witchellia spinifera. The faunal horizons of the Laeviuscula and Sauzei zones of southern Germany and southern England are correlated. The microfauna is briefly described.
Stephanoceras umbilicum ist die Index-Art des in Mitteleuropa gebräuchlichen umbilicum-Horizonts ... more Stephanoceras umbilicum ist die Index-Art des in Mitteleuropa gebräuchlichen umbilicum-Horizonts (Humphriesianum-Subzone, Humphriesianum-Zone, Unter-Bajocium, Mittel-Jura). Aus dem umbilicum-Horizont an der Typus-Lokalität in Essingen bei Aalen wird die Stephanoceraten-Fauna beschrieben. Diese lässt sich morphospezifisch den Arten S. umbilicum, S. mutabile und S. scalare zuordnen. Der Aufschluss von Essingen wird mit weiteren Fundorten in Süd-und Norddeutschland, Frankreich und Südengland korreliert. Für S. umbilicum (Quenstedt, 1886) und S. mutabile (Quenstedt, 1886) werden Lectotypen designiert. Um Fehlkorrelationen zu vermeiden, sollte eine Umbilicum-(Sub-)Zone keine Verwendung finden.
A Lower Bajocian section from southern Neuquén Basin (Argentina), with 3 faunal horizons (sphaero... more A Lower Bajocian section from southern Neuquén Basin (Argentina), with 3 faunal horizons (sphaeroceroides, submicrostoma and giebeli horizons) in the Singularis and Giebeli zones, is described. The Giebeli Zone is relatively thick in contrast with the section at Paso del Espinacito. The ammonite species Chondromileia submicrostoma (Gottsche) is quite variable and consists of large specimens. For the first time well preserved and complete macroconch specimens of Emileia multiformis (Gottsche) are described. It is shown that the lithostratigraphic and biostratigraphic boundaries are not coincident in the studied section.
We present a modern revision of the dimorphic ammonite pair Strigoceras QUENSTEDT, 1886/Cadomocer... more We present a modern revision of the dimorphic ammonite pair Strigoceras QUENSTEDT, 1886/Cadomoceras MUNIER-CHALMAS, 1892 from the Middle Jurassic. The stratigraphically oldest hitherto known chronospecies of Strigoceras, S. praenuntium (BUCKMAN) appears in the Middle Aalenian as an extreme rarity. Records of the microconch genus Cadomoceras re- main unknown from strata older than Early Bajocian, but otherwise its stratigraphical range corresponds well with that of the macroconchs. The genus probably became extinct in the Early Bathonian (Zigzag Zone). The youngest known Strigoceras is S. callomoni n. sp. descri- bed here from the Macrescens Subzone of the Early Bathonian. Another new strigoceratid species, Granulochetoceras oppeliisculptum n. sp., is recorded by a single specimen from the early Garantiana Zone of eastern Spain, representing an interesting phyletic link between Stri- goceras QUENSTEDT, 1886 and Granulochetoceras GEYER, 1960. We include a brief review of the latter ge...
A new stephanoceratid ammonite species, Riccardiceras richardsoni n. sp. is described from the Lo... more A new stephanoceratid ammonite species, Riccardiceras richardsoni n. sp. is described from the Lower Bajocian of S England and SW Germany. The holotype comes from the Inferior Oolite, Laeviuscula Zone, Sayni Subzone (ammonite faunal horizon Bj-7a) of Bruton, So- merset. Another homoeomorphic stephanoceratid is reported from the same bed and differs from Riccardiceras by its coronate-cadiconic juvenile stage. It is placed in a new genus, Westermannites n. g. (type species: Coeloceras limatum POMPECKJ), and a new species, Wester- mannites brutonensis n. sp., is erected. A cf.-record of Riccardiceras richardsoni n. sp. from SW Germany is reported from the "Unterer Wedelsandstein" Member of the Wutach area. Its stratigraphical level is a calcareous arenite bed within the Ovale Zone.
A succession of 4 ammonite faunal horizons is described in detail from the Lower Bajocian (Ovale ... more A succession of 4 ammonite faunal horizons is described in detail from the Lower Bajocian (Ovale and Laeviuscula zones) of eastern Swabia. Their ammonite faunas are described and reviewed. A new classification is proposed of the Sonniniidae BUCKMAN, 1892 in which the genera Sonninia BAYLE, 1879, Shirbuirnia BUCKMAN, 1910, Witchellia BUCKMAN, 1889, and Pseudoshirbuirnia n. gen. are regarded as independent phyletic strands. Fissilobiceras BUCK- MAN, 1919 is assigned to Hammatoceratidae BUCKMAN, 1887. A new genus, Pseudoshirbuir- nia (type species Amaltheus? stephani BUCKMAN, 1883) with a new species, Pseudoshirbuirnia oechslei n. sp. (= Sonninia tessoniana tessoniana (D'ORBIGNY) in OECHSLE) are erected. To sta- bilize the use of species names lectotypes are formally designated for Witchellia jugifera (WAAGEN), Shirbuirnia gingensis (WAAGEN), Sonninia (Euhoploceras) adicra (WAAGEN), and S. (Eu.) costosa (QUENSTEDT). The type horizons of some important ammonite taxa intro- duced by ...
... Page 3. Editors-in-Chief/Herausgeber: Winfried Werner, Michael Krings Production and Layout/B... more ... Page 3. Editors-in-Chief/Herausgeber: Winfried Werner, Michael Krings Production and Layout/Bildbearbeitung und Layout: Martine Focke, Lydia Geißler, Manuela Schellenberger Bayerische Staatssammlung für Paläontologie und Geologie Richard-Wagner-Str. ...
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2014
The stratigraphy of part of the Inferior Oolite Formation at Frogden Quarry, Dorset, U.K. is revi... more The stratigraphy of part of the Inferior Oolite Formation at Frogden Quarry, Dorset, U.K. is revised based on new ammonite evidence. In the Lower Inferior Oolite Formation the Oborne Ironshot Member is erected to include beds 4 to 5 of the section (Sauzei and Humphriesianum zones). Oborne is designated as the type locality. For part of the Upper Inferior Oolite Formation of the Inferior Oolite Group in the Sherborne area of Dorset a new formal lithostratigraphical scheme is proposed, with the Sherborne Limestone Member at the base (including the basal Acanthothyris Beds, Sherborne Building Stone Beds and Redhole Lane Beds) followed by the Combe Limestone Member. The Sherborne Limestone Member is shown to belong to one ammonite faunal horizon, Bj-24a Garantiana dichotoma, of the Garantiana Zone. In the Combe Limestone Member a new ammonite faunal horizon Bj-24b Garantiana subgaranti is described for the first time in England. Faunal horizons Bj-25 Garantiana tetragona and Bj-26 Parkinsonia rarecostata are confirmed in the Sherborne area. A mechanism is suggested for the deposition of the Sherborne Limestone Member.
A b s t r a c t The classical outcrop of the Paso del Espinacito (San Juan Province, Argentina), ... more A b s t r a c t The classical outcrop of the Paso del Espinacito (San Juan Province, Argentina), wherefrom and TORNQUIST (1898) described many Early Bajocian ammonite species -some of them later became type species of new genera -was restudied by one of us (A. v. H.) in 1968. The newly collected ammonites sampled bed-by-bed are described and illustrated. The fi nds of many topotypes for most of the GOTTSCHE and TORNQUIST taxa allows a reconstruction of their type horizons. The strata are subdivided in the standard chronozones of the Andean Province: the Puchenquia malarguensis Zone in the Aalenian and the Pseudotoites singularis and Chondromileia giebeli zones in the Lower Bajocian. The Singularis Zone is subdivided into two new subzones: the Fissilobiceras zitteli Subzone in the lower part with the Pseudotoites singularis horizon and the Sonninia altecostata Subzone in the upper part with the Pseudotoites sphaeroceroides horizon. The Giebeli Zone is subdivided into their standard subzones: the Chondromileia submicrostoma Subzone with the horizon of Ch. submicrostoma and the Emileia mulitiformis Subzone with the Ch. giebeli horizon. These zones and subzones of the Andean Province are tentatively correlated with the standard zones of the Northwest-European Province.
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