Latonia sp.

Syromyatnikova, Elena, Tesakov, Alexey, Mayda, Serdar, Kaya, Tanju & Saraç, Gerçek, 2019, Plio-Pleistocene Amphibians And Reptiles From Central Turkey: New Faunas And Faunal Records With Comments On Their Biochronological Position Based On Small Mammals, Fossil Imprint 75 (3 - 4), pp. 343-358 : 349

Latonia sp.

Text-fig. 5a, b

M a t e r i a l. Two ilia, EUNHM PV-13223–13224,

Nasrettinhoca 2, early Pliocene, MN 14.

D e s c r i p t i o n. The specimens are represented by two fragmentary left ilia ( Text-fig. 5a, b ). The largest one ( Text-fig. 5b ) is represented by a posterior part of the shaft and anterior part of the acetabular fossa. The preserved part of the dorsal crest is thin and dorsoventrally inclined. Though fragmentary, the dorsal acetabular expansion (= pars ascendens) is prominent, whereas the ventral acetabular expansion (= pars descendens) is small. The dorsal tubercle (= tuber superior) is well developed and anteriorly elongated and projects dorsolaterally from the outline of the bone. It is located dorsal to the acetabular fossa. The tubercular fossa is deep. Two foramina pierce the bottom of the tubercular fossa. The anterior margin of the acetabular fossa is prominent laterally. The smaller ilium ( Text-fig. 5a ) is better preserved but seemingly belonged to a juvenile specimen. It is missing the dorsal crest and most of the dorsal tubercle. The ilioischiadic juncture (= junctura ilioischiadica) is expanded ventrally with an interiliac tubercle (= tuber interiliacus; visible in the smaller specimen; Text-fig. 5a 3 ).

R e m a r k s. Latonia is most closely related to Discoglossus (subfamily Discoglossinae ; e.g. Sanchiz 1984). Sometimes it is generally difficult to discriminate between these two genera, especially juvenile Latonia and adult Discoglossus . The ilia (especially the smaller one, Text-fig. 5a ) from Nasrettinhoca 2 are relatively small in size. But they can be assigned to Latonia based on the small ventral acetabular expansion, prominent anterior margin and low posterior margin of the acetabular fossa ( Roček 2013). Fossil and recent Discoglossus are unknown in Turkey.

Family Palaeobatrachidae COPE, 1865

Figures

Text-fig. 5. Amphibians: a, b – Latonia sp. from Nasrettinhoca 2: a – left ilium in lateral (a1) and medial (a2) views, and junctura ilioischiadica (a3), EUNHM PV-13223; b – left ilium in lateral (b1) and medial (b2) views, EUNHM PV-13224; c – right angular of Palaeobatrachus sp. from Mercan 1, in medial (c1) and dorsal (c2) views, EUNHM PV-13225; d – left ilium of Pelobates sp. from Nasrettinhoca 2 in lateral (d1) and medial (d2) views, EUNHM PV-13226; e – right ilium of Bufotes viridis s. l. from Nasrettinhoca 2, in lateral (e1) and medial (e2) views, EUNHM PV-13227; f – left angular of Pelophylax sp. from Mercan 1, in dorsal view, EUNHM PV-13228; g – right ilium of Pelophylax sp. from Mercan 1, in lateral (g1) and medial (g2) views, EUNHM PV-13229; h – right ilium of Pelophylax sp. from Hoyhoytepe 1, in lateral (h1) and medial (h2) views, EUNHM PV-13234; i – left angular of Ranidae indet. from Hamamkarahisar A, in dorsal view, EUNHM PV-13237. Scale equals 1 mm.

Text-fig. 3. Arvicolids from Plio-Pleistocene sites of Eskişehir-Sivrihisar region (Central Turkey). a–c – Promimomys cf. insuliferus from Nasrettinhoca 2: a – M3 dex., EUNHM PV-13200; b – fragmentary M2 sin., EUNHM PV-13201; c – M1 sin., EUNHM PV-13202; d – Promimomys sp. from Hamamkarahisar B, M1 sin., EUNHM PV-13203; e–i – Mimomys cf. hajnackensis: e, f – Hoyhoytepe 2, m1–m2 from the same mandibular tooth row: e – m1 sin., EUNHM PV-13204; f – m2 sin., EUNHM PV-13205; g, h – Mercan 1: g – M1 dex., EUNHM PV-13206; h – M3 sin., EUNHM PV-13207; i – Hoyhoytepe 3, M3 sin., EUNHM PV-13208; j – Mimomys ex gr. stehlini-hintoni from Mercan 2, M1 dex., EUNHM PV-13209 in lingual view (j2) and labial (j3) views. Scales for occlusal (larger), and lateral (smaller) views equal 1 mm.