Skip to main content

Taxonomy, morphology and phylogeny of Lower Jurassic teudopseid coleoids (Cephalopoda)

Buy Article:

$39.00 plus tax (Refund Policy)

Abstract:

Previously, the number of teudopseid coleoids that roamed the European seas during Early Toarcian times has been unclear. Re-study of a large set of teudopseid gladii from different European localities show that three species existed at that time: Teudopsis bunelii Eudes-Deslongchamps, 1835, Teudopsis bollensis Voltz, 1836 and Teudopsis subcostata (M√ľnster, 1843). In the course of taxonomic treatments, the three taxa are re-described, a lectotype is designated for the first one, and neotypes are designated for the latter two. The most striking difference concerns the anterior shape. It is rachis-like in Teudopsis bunelii, triangular in Teudopsis bollensis, and lanceolate in Teudopsis subcostata. Although an out-group comparison is problematic, the pronounced dorsal keel is an unequivocal autapomorphy of the Teudopseina. The gladius of Teudopsis subcostata seems to possess the most ancient character combination. Phylogenetically, the trachyteuthidid lineage might have been originated from Teudopsis subcostata, whereas the palaeololiginid/muensterellid lineage evolved from Teudopsis bunelii. A close phylogenetic relationship between teudopseids and modern decabrachian as sometimes proposed is not supported.

Keywords: FOSSIL COLEOIDEA; GLADIUS MORPHOLOGY; TAXONOMY; TEUDOPSEINA; TEUDOPSIS; TOARCIAN

Document Type: Research Article

DOI: https://doi.org/10.1127/0077-7749/2010/0083

Publication date: 2010-09-01

More about this publication?
  • Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more