NDLI: A new palaeospinacid shark (Chondrichthyes, Neoselachii) from the Upper Jurassic of southern Germany

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A new palaeospinacid shark (Chondrichthyes, Neoselachii) from the Upper Jurassic of southern Germany

Content Provider	Scilit
Author	Klug, Stefanie
Copyright Year	2009
Description	The Palaeospinacidae are a highly diverse clade (> 30 species) within the Synechodontiformes, which are considered to be a monophyletic group of basal galeomorph sharks. Four genera, Macrourogaleus, Paraorthacodus, Palidiplospinax, and Synechodus, are included in the Palaeospinacidae, ranging in age from the Early Permian to the Paleogene. So far, the only described palaeospinacids from the Upper Jurassic lithographic limestones of southern Germany are several specimens of Macrourogaleus from the Solnhofen area, and a single one of Paraorthacodus jurensis from Nusplingen. The presence of Synechodus in the Upper Jurassic of southern Germany was only indicated by a single figured but undescribed tooth. An incomplete and disarticulated skeleton of a small neoselachian shark and additional isolated teeth from the Kimmeridgian of Baden-Württemberg represent the first record of Synechodus in the Upper Jurassic lithographic limestones of Germany. The skeleton includes parts of the vertebral column, the left palatoquadrate, the right Meckel's cartilage, several fragments of calcified cartilage of the cranial skeleton, 32 teeth, and several placoid scales. The dental features unique to this species include a slender and sub-triangular main cusp, a crown ornamentation consisting of long ridges, a basal reticulation pattern that does not extend basally to the crown-root boundary, and a basal labial depression of the main cusp in anterior teeth.
Related Links	http://doc.rero.ch/record/210230/files/PAL_E4319.pdf
Ending Page	335
Page Count	10
Starting Page	326
ISSN	02724634
e-ISSN	19372809
DOI	10.1671/039.029.0203
Journal	Journal of Vertebrate Paleontology
Issue Number	2
Volume Number	29
Language	English
Publisher	Informa UK Limited
Publisher Date	2009-06-12
Access Restriction	Open
Subject Keyword	Journal: Journal of Vertebrate Paleontology Paleontology Diverse Basal Germany Macrourogaleus Cusp Palaeospinacidae Cartilage Upper Jurassic Paraorthacodus
Content Type	Text
Resource Type	Article
Subject	Paleontology

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