Undetermined undetermined, McDowell, 1987

Venczel, Márton, Codrea, Vlad A., Solomon, Alexandru A., Fărcaș, Cristina & Bordeianu, Marian, 2025, Late Eocene-early Oligocene snakes from the Transylvanian Basin (Romania), Comptes Rendus Palevol 24 (13), pp. 229-240 : 236

UNGALIOPHIIDAE indet.

( Fig. 4 J-N)

MATERIAL. — Treznea : one posterior caudal vertebra ( UBB V 1048 ) .

DESCRIPTION

The only available caudal vertebra (UBB V 1048) is known from the Treznea locality ( Fig. 4 J-N). It appears well-preserved; however, its surface displays some signs of erosion. The neural arch is strongly depressed and the neural spine is reduced to a low keel. In ventral and lateral views, the centrum possesses a prominent haemal keel, connected to a rounded condyle. The haemal keel is somewhat enlarged posteriorly and displays on the posteroventral side two small knobs ( Fig. 4K).

REMARKS

The main feature of the single available specimen (UBB V 1048) is the presence of a well-developed haemal keel on the subcentral surface, reminiscent of Rieppelophis ermannorum ( Schaal & Baszio, 2004) , in which the haemapophyses in the caudal vertebrae are replaced by paired knobs ( Scanferla et al. 2016: fig. 18B). Additionally, it shares similarities with recent ungaliophiids ( Exiliboa and Ungaliophis ), which possess a distinct haemal keel in the caudal vertebrae, instead of paired haemapophyses ( Szyndlar & Georgalis 2023).