A new early Late Oligocene (MP 26) continental vertebrate fauna from Saint-Privat-des-Vieux (Alès Basin, Gard, Southern France)
Author
Vianey-Liaud, Monique
Author
Comte, Bernard
Author
Marandat, Bernard
Author
Peigné, Stéphane
Author
Rage, Jean-Claude
Author
Sudre, Jean
text
Geodiversitas
2014
2014-12-26
36
4
565
622
http://dx.doi.org/10.5252/g2014n4a4
journal article
6390
10.5252/g2014n4a4
8bc26961-9853-4113-a63d-4cf691aa7100
1638-9395
4538625
cf.
Chelotriton
Pomel, 1853
TYPE
SPECIES
. —
Chelotriton paradoxus
Pomel, 1853
by monotypy.
MATERIAL EXAMINED. — One incomplete trunk vertebra (
SPV
710).
DESCRIPTION
Ŋe vertebra preserves the centrum, incomplete prezygapophyses and the right rib-bearer. Ŋe centrum is opisthocoelous, its condyle being well-ossified. Ŋe rib-bearer is bicipital; the two processes are clearly, although not widely, divergent and connected by a bony lamina up to their tips. Ŋe anterior zygapophyseal crest is not horizontal; it extends posteroventrally to join the lamina that unites the rib-bearers. Ŋe surface of the bone shows an ornamention comprising pits and ridges.
DISCUSSION
Although the specimen is incomplete, the available characters permit identification below family level. Ŋe connection of the anterior zygapophyseal crest to the lamina of the rib-bearer is characteristic of a small assemblage of extinct and living
Salamandridae
. Among them is
Chelotriton
(
Bailon
et al.
2011
)
, the only genus of this assemblage that occurs in the Oligocene of Europe. Ŋe overall morphology of the fossil is consistent with
Chelotriton
; however, the ornamentation of the bone surface appears to be more marked than in the known remains of this genus. Ŋerefore, the referral to
Chelotriton
cannot be accepted without reservation.
Chelotriton
was reported only in Europe, from the Middle Eocene (MP 11) to the Late Pliocene (MN 16) (
Bailon 1989
). It occurs more frequently in the Oligocene and Miocene than in the other levels.