Palaeonatrix, Szyndlar, 1982

Rage, Jean-Claude & Bailon, Salvador, 2005, Amphibians and squamate reptiles from the late early Miocene (MN 4) of Béon 1 (Montréal-du-Gers, southwestern France), Geodiversitas 27 (3), pp. 413-441 : 432

Palaeonatrix aff. P. lehmani

( Rage & Roček, 1983)

Dolniceophis lehmani Rage & Roček, 1983: 17-21 , pls 1-2.

Palaeonatrix lehmani – Szyndlar 1987: 60, 61, fig. 5.

MATERIAL EXAMINED. — 18 trunk vertebrae (Béon 2004 LT 72, 73).

COMMENTS

On the whole, the vertebrae are reminiscent of N. longivertebrata . However, the base of the haemal keel extends anteriorly as a deep keel, the subcentral ridges reach the condyle, the neural arch is less depressed, and the paradiapophyses strongly project below the centrum. Vertebrae of P. lehmani are figured in Rage & Roček 1983 (pl. I, II, as Dolniceophis lehmani ), Szyndlar 1987 (fig. 2), and Szyndlar & Schleich 1993 (fig. 5).

P. lehmani was reported from the early Miocene (M N 4) o f D o l n i c e, C z e c h R e p u b l i c, a n d Petersbuch 2, Germany ( Szyndlar & Schleich 1993). Another species, P. silesiaca , is known from the middle Miocene (MN 7+8) of Poland ( Szyndlar 1982).

Palaeonatrix aff. P. lehmani was reported from the middle Miocene (MN 6) of Sansan ( Augé & Rage 2000); it could not be referred to P. lehmani without reservation because several specimens show tendencies toward P. silesiaca Szyndlar, 1982 (sizes of neural canal, condyle and cotyle). The specimens from Béon 1 do not show these tendencies; however, they differ from the typical specimens of the species in having more vaulted neural arches.