Ophisaurus, Daudin, 1803

Venczel, Márton & Stiuc, Emanoil, 2008, Late middle Miocene amphibians and squamate reptiles from Taut ,, Romania, Geodiversitas 30 (4), pp. 731-763: 753-754

publication ID

http://doi.org/10.5281/zenodo.4665621

persistent identifier

http://treatment.plazi.org/id/03D08790-FFD3-FFFF-5652-A303FDF4501C

treatment provided by

Felipe

scientific name

Ophisaurus
status

 

Ophisaurus   sp. ( Fig. 13A, B View FIG )

MATERIAL EXAMINED. — Ten vertebrae ( ISER Tt-0460/- 1-10), 14 osteoderms ( ISER Tt-0461/1-14).

DESCRIPTION

Vertebrae

The vertebrae belonged to individuals of various sizes. The ventral surface of the centrum is slightly convex while the subcentral margins are slightly concave. Shallow anteroposterior grooves pass on the subcentral foramina, delimiting a median more elevated subcentral area.The interzygapophyseal ridges are better developed in the vicinity of the zygapophyses featuring an X-shape to the vertebrae ( Fig. 13B View FIG ). The haemal processes in all caudal vertebrae are broken off.

Osteoderms

The osteoderms are small, relatively thin and of

rectangular shape. The outer surface displays a distinct medial ridge and a series of bifurcating and confluent tubercles are developed on the lateral sides of the osteoderm ( Fig. 13A View FIG ). A specimen (ISER Tt-0461/2) displays a uniting line which indicates that it was constituted from two consecutive osteoderms.

REMARKS

The morphology and size of trunk vertebrae approaches the condition seen in cf. Ophisaurus   – morphotype I, described from the late early Miocene (MN 4) of Dolnice, Czech Republic ( Roček 1984) and that of Ophisaurus   sp., described from the late Miocene (MN 13) of Polgárdi, Hungary ( Venczel 2006: fig. 2C, D). Furthermore, some resemblance with the trunk vertebrae of Anguis Linnaeus, 1758   may be evidenced too. However, the latter never displays longitudinal grooves delimiting a medial keel. In the genus Pseudopus Merrem, 1820   the centrum is more flattened and widened anteriorly ( Rage & Bailon 2005) and the osteoderms are more thickened in the middle. The osteoderms in Anguis   have an oval or irregular shape and are devoid of

bony keel on their sculptured surface.

Venczel M. & Ştiucă E.

Family BLANIDAE Kearney, 2003  

ISER

Institutul Speologie Emil G. Racovita

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Squamata

Family

Anguidae