Hyla sp.

Villa, Andrea, Macaluso, Loredana & Mörs, Thomas, 2024, Miocene and Pliocene amphibians from Hambach (Germany): New evidence for a late Neogene refuge in northwestern Europe, Palaeontologia Electronica (a 3) 27 (1), pp. 1-56 : 30

publication ID	https://doi.org/10.26879/1323
DOI	https://doi.org/10.5281/zenodo.11033567
persistent identifier	https://treatment.plazi.org/id/03F52665-D049-FF96-FBE2-9A81FA5776D3
treatment provided by	Felipe (2024-04-11 18:25:58, last updated 2024-11-26 06:59:27)
scientific name	Hyla sp.
status

Treatment

Hyla sp.

Figure 20 View FIGURE 20

Material. Hambach 6C: one sacral vertebra (IPB-HaH 2195). Hambach 11: one ilium (IPB-HaR 2088).

Description. The sacral vertebra ( Figure 20 View FIGURE 20 A-D) is moderately small and has an anterior cotyle and two posterior condyles. The posterior condyles are well separated. The neural canal is elliptical and the dorsal surface of the neural arch does not present a distinct carina neuralis. The prezygapophyses are suboval and slightly tilted dorsally (about 30°). The transverse processes are broken off, but, judging from the preserved portion of the left one, they seem to have been anteroposteriorly extended.

IPB-HaR 2088 ( Figure 20E View FIGURE 20 ) is a small ilium with a globular and laterally-bending dorsal tubercle. The dorsal crest is absent and the preacetabular zone is strongly expanded anteroventrally. The posterior portion of the ilial body is broken.

Remarks. Following the diagnostic criteria reported by Bailon (1999), these two fossils can be attributed to a tree frog. The combination of features that is diagnostic for the sacral vertebra is: anterior cotyle; two well-differentiated posterior condyles; extended transverse processes; and no carina neuralis. The diagnostic combination for the ilium is, on the other hand: no dorsal crest; expanded preacetabular zone; and globular and laterally-bending dorsal tubercle. A specific identification of European Hyla species based on isolated bones is considered impossible by most authors (e.g., Bailon, 1999; Sanchiz, 1981; Sanchiz and Młynarski, 1979a; Sanchiz and Sanz, 1980). Nevertheless, it is possible that at least the ilium coming from the most recent level in Hambach pertains to the Hyla arborea ( Linnaeus, 1758) species complex, including the extant European species of the genus ( Faivovich et al., 2005; Stöck et al., 2008).

References

Bailon, S. 1999. Differenciation osteologique des anoures (Amphibia, Anura) de France, p. 1 - 41. In Desse, J. and Desse-Berset, N. (eds.), Fiches d'osteologie animale pour l'Archeologie, Serie C: Varia, 1. APDCA, Antibes.

Faivovich, J., Haddad, C. F. B., Garcia, P. C. A., Frost, D. R., Campbell, J. A., and Wheeler, W. C. 2005. Systematic review of the frog family Hylidae, with special reference to Hylinae: phylogenetic analysis and taxonomic revision. Bulletin of the American Museum of Natural History, 294: 1 - 240. https: // doi. org / 10.1206 / 0003 - 0090 (2005) 294 [0001: SROTFF] 2.0. CO; 2

Linnaeus, C. 1758. Systema naturae per regna tria naturae, secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis. Tomus 1, Pars 1. Laurentii Salvii, Stockholm. https: // doi. org / 10.5962 / bhl. title. 542

Sanchiz, B. and Mlynarski, M. 1979 a. Remarks on the fossil anurans from the Polish Neogene. Acta Zoologica Cracoviensia, 24: 153 - 174.

Sanchiz, B. and Sanz, J. L. 1980. Los anfibios del Pleistoceno medio de Aridos- 1 (Arganda, Madrid), p. 105 - 126. In Lopez Martinez, N., Perez Gonzalez, A., and Santonja Gomez, M. (eds.), Ocupaciones achelenses en el valle del Jarama. Diputacion Provincial, Servicios de Extension Cultural y Divulgacion, Madrid.

Sanchiz, B. 1981. Registro fosil y antiguedad de la familia Hylidae (Amphibia, Anura) en Europa. Anais do Congreso Latino-americano de Paleontologia, 22: 757 - 764.

Stock, M., Dubey, S., Klutsch, C., Litvinchuk, S. N., Scheidt, U., and Perrin, N. 2008. Mitochondrial and nuclear phylogeny of circum-Mediterranean tree frogs from the Hyla arborea group. Molecular Phylogenetics and Evolution, 49: 1019 - 1024. https: // doi. org / 10.1016 / j. ympev. 2008.08.029

Figures

FIGURE 20. Hyla sp. from Hambach: sacral vertebra (IPB-HaH 2195) in dorsal (A), ventral (B), anterior (C) and posterior (D) views; left ilium (IPB-HaR 2088) in lateral view (E). Scale bars equal 1 mm. Abbreviations: dt, dorsal tubercle; pz, preacetabular zone.