{"title":"德国南部法兰克尼亚早侏罗世腹足类动物","authors":"A. Nützel, Joachim Gründel","doi":"10.1127/PALA/305/2015/1","DOIUrl":null,"url":null,"abstract":"40 nominate gastropod species are described from the Early Jurassic (Late Pliensbachian) Amaltheenton Formation of Franconia (Northern Bavaria, SouthernGermany). In addition 11 species are treated in open nomenclature.Most of thematerial comes from the clay pits at Buttenheim and Kalchreuth. The gastropods occur in grey shales representing former marine soft bottom environments. Gastropods are the most diverse and locally even the most abundant taxonomic group comprising the benthic communities of the Amaltheenton Formation in Franconia. Bivalves, scaphopods, ophiuroids, crinoids and brachiopods are also abundant. Among bivalves, the oyster-likePlicatula spinosa andNuculoidea are especially abundant.The gastropods andmost of the other benthic species are small (< 15 mm) or even minute. Only three gastropod species attain a size >50 mm: Pleurotomaria amalthei, Pseudokatosira undulata and Buttenheimia dietzi. However, these large species are rare. The most abundant gastropods are the caenogastropods Levipleura blainvillei, Kalchreuthia frankei and Francocerithium kochi and the heterobranch Domerionina domeria.Heterobranchia, especially architectibranchs (formerly Opisthobranchia) have the highest species diversity among gastropod subclasses or orders. Eleven species are described as new: Striatoconulus? trimeuselensis, Costasphaera franconica, Cryptaulax johanni, Purpurina liassica, Tripartella neubaueri, Buttenheimia dietzi, Tricarilda schoberti, Tricarilda recta, Camponaxis jurassica, Schobertinella heterogyrata and Sulcoactaeon sendelbachensis. Three genera are described as new: Costasphaera, Buttenheimia and Schobertinella. The validity and identity of the genera Pseudokatosira andKatosira is discussed based on the study of the holotypes of both of the disputed type species ofKatosira:Katosira periniana (Early Jurassic, France) orKatosira fragilis (Late Triassic, SouthernAlps).We conclude that K. periniana is correctly considered to be the type species. Both holotypes are illustrated and re-described here.","PeriodicalId":56099,"journal":{"name":"Palaeontographica Abteilung A-Palaozoologie-Stratigraphie","volume":null,"pages":null},"PeriodicalIF":1.8000,"publicationDate":"2015-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"23","resultStr":"{\"title\":\"Early Jurassic (Pliensbachian)gastropods from Franconia, Southern Germany\",\"authors\":\"A. Nützel, Joachim Gründel\",\"doi\":\"10.1127/PALA/305/2015/1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"40 nominate gastropod species are described from the Early Jurassic (Late Pliensbachian) Amaltheenton Formation of Franconia (Northern Bavaria, SouthernGermany). In addition 11 species are treated in open nomenclature.Most of thematerial comes from the clay pits at Buttenheim and Kalchreuth. The gastropods occur in grey shales representing former marine soft bottom environments. Gastropods are the most diverse and locally even the most abundant taxonomic group comprising the benthic communities of the Amaltheenton Formation in Franconia. Bivalves, scaphopods, ophiuroids, crinoids and brachiopods are also abundant. Among bivalves, the oyster-likePlicatula spinosa andNuculoidea are especially abundant.The gastropods andmost of the other benthic species are small (< 15 mm) or even minute. Only three gastropod species attain a size >50 mm: Pleurotomaria amalthei, Pseudokatosira undulata and Buttenheimia dietzi. However, these large species are rare. The most abundant gastropods are the caenogastropods Levipleura blainvillei, Kalchreuthia frankei and Francocerithium kochi and the heterobranch Domerionina domeria.Heterobranchia, especially architectibranchs (formerly Opisthobranchia) have the highest species diversity among gastropod subclasses or orders. Eleven species are described as new: Striatoconulus? trimeuselensis, Costasphaera franconica, Cryptaulax johanni, Purpurina liassica, Tripartella neubaueri, Buttenheimia dietzi, Tricarilda schoberti, Tricarilda recta, Camponaxis jurassica, Schobertinella heterogyrata and Sulcoactaeon sendelbachensis. Three genera are described as new: Costasphaera, Buttenheimia and Schobertinella. The validity and identity of the genera Pseudokatosira andKatosira is discussed based on the study of the holotypes of both of the disputed type species ofKatosira:Katosira periniana (Early Jurassic, France) orKatosira fragilis (Late Triassic, SouthernAlps).We conclude that K. periniana is correctly considered to be the type species. 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Early Jurassic (Pliensbachian)gastropods from Franconia, Southern Germany
40 nominate gastropod species are described from the Early Jurassic (Late Pliensbachian) Amaltheenton Formation of Franconia (Northern Bavaria, SouthernGermany). In addition 11 species are treated in open nomenclature.Most of thematerial comes from the clay pits at Buttenheim and Kalchreuth. The gastropods occur in grey shales representing former marine soft bottom environments. Gastropods are the most diverse and locally even the most abundant taxonomic group comprising the benthic communities of the Amaltheenton Formation in Franconia. Bivalves, scaphopods, ophiuroids, crinoids and brachiopods are also abundant. Among bivalves, the oyster-likePlicatula spinosa andNuculoidea are especially abundant.The gastropods andmost of the other benthic species are small (< 15 mm) or even minute. Only three gastropod species attain a size >50 mm: Pleurotomaria amalthei, Pseudokatosira undulata and Buttenheimia dietzi. However, these large species are rare. The most abundant gastropods are the caenogastropods Levipleura blainvillei, Kalchreuthia frankei and Francocerithium kochi and the heterobranch Domerionina domeria.Heterobranchia, especially architectibranchs (formerly Opisthobranchia) have the highest species diversity among gastropod subclasses or orders. Eleven species are described as new: Striatoconulus? trimeuselensis, Costasphaera franconica, Cryptaulax johanni, Purpurina liassica, Tripartella neubaueri, Buttenheimia dietzi, Tricarilda schoberti, Tricarilda recta, Camponaxis jurassica, Schobertinella heterogyrata and Sulcoactaeon sendelbachensis. Three genera are described as new: Costasphaera, Buttenheimia and Schobertinella. The validity and identity of the genera Pseudokatosira andKatosira is discussed based on the study of the holotypes of both of the disputed type species ofKatosira:Katosira periniana (Early Jurassic, France) orKatosira fragilis (Late Triassic, SouthernAlps).We conclude that K. periniana is correctly considered to be the type species. Both holotypes are illustrated and re-described here.
期刊介绍:
Palaeontographica Section A publishes peer reviewed results of studies on palaeozoology, paleoecology and biostratigraphy. Its large paper format provides sufficient space for large tables, illustrations, photographs and Palaeontographica’s renowned plates.
Published contributions span all areas of palaeozoology, i.e., systematic, phylogenetic and ecological aspects. Careful peer review ensures the high quality of the papers, covering localities all over the world. Many landmark papers in palaeozoology and biostratigraphy were published in Section A of Palaeontographica. This includes numerous lavishly illustrated monographs of certain groups of fossils and stratigraphic ranges. These monographs, are typical for Paleontographica papers, characterised by numerous highest quality plates and are printed on special high quality paper for excellent reproduction of picture plates.