Print ISSN: 0031-0247
Online ISSN: 2274-0333
Frequency: biannual
Field trip guides/EAVP Annual Conference/2023
Embrithopod from Croatia
CYLINDRACANTHUS FROM INDIA
BLANCO ET AL.—NECK POSTURE OF M. PATACHONICA
Book of Abstracts/EAVP Annual Conference/2023
Eocene (57) , Quercy phosphorites (37) , Systematics (32) , Rodents (29) , Mammalia (26)
New material of “Eurysternidae” (Thalassochelydia, Pan-Cryptodira) from the Kimmeridgian of the Swiss Jura MountainsChristian Püntener, Jérémy Anquetin and Jean-Paul Billon-BruyatKeywords: Eurysternidae; Late Jurassic; morphology; Switzerland; Testudines; Thalassochelydiadoi: 10.18563/pv.43.1.e2 Abstract The region of Porrentruy (Swiss Jura Mountains) is known for its rich and diverse assemblage of Late Jurassic coastal marine turtles (Thalassochelydia). Dominated by the “Plesiochelyidae”, this assemblage also includes representatives of the two other thalassochelydian groups, the “Thalassemydidae” and “Eurysternidae.” In this study, we present new shell-based material from Porrentruy referable to eurysternids. One specimen represents a juvenile individual or a relatively small taxon, and is notably characterized by a well fenestrated plastron exhibiting a wider than long central plastral fontanelle. Two other specimens are much larger and possibly represent the largest eurysternids known to date. The fourth specimen is characterized by a unique plastral morphology otherwise only known in very small juveniles. This is the first time this unique plastral morphology is known to persist in an adult or subadult. The new material described herein represents at least three distinct taxa, all of them probably new. However, we refrain from naming new species based on this incomplete material in order to avoid adding confusion to an already complex taxonomical situation. This study provides new insights into the great diversity of eurysternids during the Late Jurassic. Article infos Published in Vol 43-1 (2020) |
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