Szabó János szerk.: Fragmenta Mineralogica Et Palaentologica 19. 2001. (Budapest, 2001)

VENCZEL, M. Genus Elaphe FlTZINGER, 1833 Elaphe kormos! (BOLKAY, 1913) (Figure 6: A-D) Material — Osztramos 1/c: 1 supraoccipital, 10 vertebrae (HNHM. No. V.99.30). Description and comments — The supraocccipital is assigned with some doubt to this form. The occipital crests are well developed, and slightly inclined posteromedially. The sagittal crest is relatively long and of low height. The hypapophysis of a cervical vertebra is directed ventrally. The trunk vertebrae are large-sized and closely resemble those described from Polgárdi 2 (e.g. flattened haemal keel, moderately long and obtuse prezygapophyseal processes, straight zygosphene) (VENCZEL 1994). The centrum length in five trunk vertebrae is between 4.61—6.58 mm, while the centrum width is between 3.43-4.88 mm. The centrum length / centrum width ratio ranged between 1.22—1.41 (mean — 1.32). Elaphe praelongissima VENCZEL, 1994 Figure 6: G-K) Material — Osztramos 1/b: 1 prootic, 1 axis, 2 vertebrae (HNHM. No. V.99.31); Osztramos 1/c: 1 exoccipital, 1 basioccipital, 16 vertebrae (HNHM. No. V.99.32). Description and comments — The morphology of the exoccipital, and in a lesser degree the prootic, resembles those described from Polgárdi 4 (VENCZEL 1994). A well-preserved basioccipital, which belonged to a small-sized specimen, having weakly defined basioccipital crests and basioccipital tubercles, was assigned to this species, too. The vertebrae are smallsized and poorly preserved. The neural arch is vaulted, provided with a relatively high neural spine. The zygosphene is concave (in few specimens it is crenate), and the prezygapophyseal processes are shorter than the prezygapophyseal articular facets, and obtused distally. The paradiapophyses are slightly divided into parapophyses and diapophyses, the former being distinctly longer than the latter one. The haemal keel is prominent and spatula-shaped (but in a few specimens it is weakly defined). In four vertebrae from Osztramos 1/c the centrum length ranges from 3.21 to 4.12 mm, while the centrum width is between 2.73—3.53 mm. The centrum length/centrum width ratio is between 1.13— 1.23. Elaphe sp. (Figure 6: E-F) Material — Osztramos 1/c: 2 vertebrae (HNHM. No. V.99.33); Osztramos 1/e: 1 basiparasphenoid, 1 exoccipital, 1 frontal, 1 compound bone, 60 vertebrae (HNHM. No. V.99.34). Description and comments — The material belonged to two different forms. Two vertebrae coming from Osztramos 1/c are small-sized (the centrum length is 3.64 and 3.68 mm respectively), with extremely low centrum length/centrum width ratio (1.01). The neural arch is depressed, with a low neural spine. The zygosphene is nearly straight with an indistinct median lobe. The haemal keel is flattened and wide. The prezygapophyseal processes in both specimens are broken off. The above described characters somewhat resemble those observed in E. s^yndlari. A fragmentary basiparasphenoid (Figure 6: E, F) is comparable to that of Elaphe praelongissima (e.g. the disposition of the foramina), but it differs from the latter by having larger basipterygoid processes, suborbital flanges, and a concave posterolateral margin. The vertebrae coming from Osztramos 1/e are small-sized. In seven trunk vertebrae the centrum length ranged between 2.82-3.12 mm, while the centrum width between 2.76—3.02 mm. The centrum length/centrum with ratio is between 1.01—1.03 (mean — 1.02). The neural arch is moderately vaulted, the haemal keel is flattened and spatulateshaped. The zygosphene is usually crenate (but a few cases it is concave or straight). The prezygapophyseal processes are moderately long and obtuse. Some of these characters similar to those of the Recent E. situla (SZYNDLAR 1991a), but the material in hand is unsuitable to demonstrate the identity. Genus Natrix LAURENTI, 1768 Natrix longivertebrata SZYNDLAR, 1984 (Figure 7: A-E) Material — Osztramos 1/b: 2 basiparasphenoids, 2 (HNHM. No. V.99.35); Osztramos 1/c: 1 frontal, 2 supraoccipitals, 4 frontals, 2 prootics, 1 prootic, 1 exoccipitals, 1 baziparasphenoid, 8 vertebrae (HNHM. ectopterygoid, 2 compound bones, 14 vertebrae No. V.99.43) Osztramos 1/e: 1 basioccipital, 2 exocci-