Taxonomy, morphology and phylogeny of plesioteuthidid coleoids from the Upper Jurassic (Tithonian) Plattenkalks of Solnhofen (original) (raw)

2007, Neues Jahrbuch f&# 252; r …

were previously the only two species of plesioteuthidid coleoids luiown from the Solnhofe n Plattenkalks . Based on morphological comparisons of 154 specimens from the Solnhofen area, a thir d taxon must be considered as valid: Plesioteuthis subovata (MONSTER, 1846) . Additionally, it turne d out that "Senefelderiteuthis Icaussi" is identical with Dorateuthis tricarinata (MONSTER, 1846) . The stratigraphical range of the genus Dorateuthis can now be extended from the Late Cretaceou s to the Late Jurassic . Despite a remarkable similarity between prototeuthid and teuthid gladii, Prototeuthidids are attributed to the Vampyropoda . Unambiguous characters of teuthid Decabrachia such as a ventrolateral pair of elongated tentacles are unknown from the fossil record . Instead, characters such as interbrachial web, radial suckers and cirri rather indicate a closer relationship with th e Vampyropoda .