Rana 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 : 32-33

Rana sp.

Figure 22 E-F

Material. Hambach 6C: one ilium (IPB-HaH 2321).

Description. IPB-HaH 2321 is moderately preserved. Laterally, a wide and subcircular acetabular fossa is visible. Dorsal to it, there is a shallow supraacetabular fossa. The dorsal tubercle is moderately distinct, low, and anteriorly inclined. Its lateral surface is smooth. The dorsal crest is present, but almost completely broken off. Both dorsal and ventral acetabular expansions are preserved and well distinct, with the latter that is more developed than the former. The dorsal acetabular expansion and the dorsal tubercle define an obtuse angle. The flat medial surface has neither an interiliac tubercle nor a groove. The ilioischiatic juncture is high and narrow.

Remarks. The following combination of features allows referral of this ilium to a brown frog ( Gleed-Owen, 1998; Bailon, 1999): presence of a dorsal crest; poorly distinct dorsal tubercle; angle between tubercle and dorsal acetabular expansion obtuse; and ilioischiatic juncture high and narrow.

Figures

FIGURE 22. Ranids from Hambach: right ilium (IPB-HaH 2307) of Pelophylax sp. in lateral (A) and medial (B) views; left ilium (IPB-HaH 2387) of Pelophylax sp. in lateral (C) and medial (D) views; left ilium (IPB-HaH 2321) of Rana sp. in lateral (E) and medial (F) views; sacral vertebra (IPB-HaR 2018) of Ranidae indet. in dorsal (G) and ventral (H) views; sacral vertebra (IPB-HaR 2019) of Ranidae indet. in dorsal (I) and ventral (J) views; left scapula (IPB-HaH 2323) of Ranidae indet. in ventral (K) and dorsal (L) views; left ilium (IPB-HaR 2087) of Ranidae indet. in lateral (M) and medial (N) views. Scale bars equal 1 mm. Abbreviations: dc, dorsal crest; dt, dorsal tubercle.