Early Cretaceous ribbed aptychi – a proposal for a new systematic classification

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dc.contributor.author Měchová, Lucie
dc.contributor.author Vašíček, Zdeněk
dc.contributor.author Houša, Václav
dc.date.accessioned 2010-07-20T10:45:41Z
dc.date.available 2010-07-20T10:45:41Z
dc.date.issued 2010
dc.identifier.citation Bulletin of geosciences. 2010, vol. 85, no. 2, p. 219-274. en
dc.identifier.issn 1214-1119
dc.identifier.issn 1802-8225
dc.identifier.uri http://hdl.handle.net/10084/78321
dc.description.abstract The older system for classification of ribbed calcareous Early Cretaceous aptychi consisted of two genera: Punctaptychus and Lamellaptychus. Later, I. Turculet divided Lamellaptychus into several subgenera. Within the framework of both the genera, species and subspecies were distinguished, which resulted in binominal and trinominal nomenclature. With regard to the richness of newly described species and subspecies in recent years, is not possible to continue using the original system. It is the basic ribbing that plays the decisive role in the generic and subgeneric classification of ribbed aptychi. In the case of subspecies systematics, all details on the valve surface are used with the exception of the sigmoidal bend (fractocostatus) and radial lines (radiatus). The ribbed aptychi are newly divided into the following families: Punctaptychidae fam. nov. and Lamellaptychidae fam. nov. Within the family Punctaptychidae we are able to distinguish two genera: Punctaptychus Trauth, 1927 and Cinctpunctaptychus gen. nov. The family Lamellaptychidae includes five genera differing in the basic arrangement of the ribs: Lamellaptychus Trauth, 1927, Beyrichilamellaptychus Turculet, 1994, Mortilletilamellaptychus gen. nov., Thorolamellaptychus Turculet, 1994 and Didayilamellaptychus Turculet, 1994. Eight species and one subspecies are established as new: Cinctpunctaptychus undulatus, Beyrichilamellaptychus pseudostuderi, Mortilletilamellaptychus mortilletioides, M. submortilleti noricus, M. stanislavi, Didayilamellaptychus hennigi, D. andrusovi and D. renzi. en
dc.format.extent 6216368 bytes cs
dc.format.mimetype application/pdf cs
dc.language.iso en en
dc.publisher Česká geologická služba en
dc.relation.ispartofseries Bulletin of geosciences en
dc.relation.uri http://dx.doi.org/10.3140/bull.geosci.1162 en
dc.subject Late Jurassic en
dc.subject J/K boundary en
dc.subject Early Cretaceous en
dc.subject aptychi en
dc.subject taxonomy en
dc.subject new taxa en
dc.title Early Cretaceous ribbed aptychi – a proposal for a new systematic classification en
dc.type article en
dc.identifier.location Ve fondu ÚK en
dc.identifier.doi 10.3140/bull.geosci.1162
dc.rights.access openAccess
dc.type.version publishedVersion
dc.identifier.wos 000279347300003

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