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FIGURE 1. Eopelobates aff. E. bayeri from Volchaya Balka locality, Russia (late Miocene, early Turolian). 1-2, frontoparietal (GIN 1143-200) in dorsal (1) and ventral (2) views; 3-4, frontoparietal (GIN 1143-201) in dorsal (3) and ventral (4) views; 5-6, right maxilla (GIN 1143-202) in labial (5) and lingual (6) views; 7-8, right maxilla (GIN 1143-203) in labial (7) and lingual (8) views; and 9-10, ?left maxilla (GIN 1143-204) in labial (9) and lingual (10) views. Scales equal 1 mm.

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FIGURE 2. Eopelobates aff. E. bayeri from Volchaya Balka locality, Russia (late Miocene, early Turolian). 1-3, presacral vertebra (GIN 1143-212) in dorsal (1), ventral (2), and lateral (3) views; 4-5, presacral vertebra (GIN 1143-213) in dorsal (4) and lateral (5) views; 6-8, sacral vertebra (GIN 1143-221) in dorsal (6), ventral (7), and anterior (8) views; and 9-11, left ilium (GIN 1143-222) in lateral (9) and medial (10) views, and outline of the junctura ilioischiadica in caudal view (11). Scales equal 1 mm.

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FIGURE 3. Pelobates sp. (1-11) and Pelobatidae indet. (12-15) from Volchaya Balka and Gaverdovsky localities, Russia (late Miocene, early Turolian). 1-2, frontoparietal (GIN 1143-223) in dorsal (1) and ventral (2) views; 3-4, left maxilla (GIN 1143-225) in labial (3) and lingual (4) views; 5-6, right maxilla (GIN 1143-226) in labial (5) and lingual (6) views; 7-9, presacral vertebra (GIN 1143-231) in dorsal (7), ventral (8), and lateral (9) views; 10-11, sacral vertebra (GIN 1144-201) in dorsal (10) and ventral (11) views; 12-13, premaxilla (GIN 1144-202) in lingual (12) and labial (13) views; and 14-15, left scapula (GIN 1143-233) in dorsal (14) and ventral (15) views. Scales equal 1 mm.

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FIGURE 4. Occurrences of Eopelobates from the Paleogene (circles) and Neogene (squares) of Europe. Co-occurrences with Pelobates are indicated by open symbols. 1, Prémontré in France (Eopelobates aff. E. hinschei), MP 10, early Eocene (Duffaud, 2000); 2, Messel in Germany (E. wagneri), MP 11, middle Eocene (Wuttke, 2012); 3, Geiseltal in Germany (E. hinschei), MP 13, middle Eocene (Estes, 1970); 4, Hordle Cliff in UK (Eopelobates cf. E. hinschei), late Eocene (Milner et al., 1982); 5, Headon Hill in UK (cf. Eopelobates), late Eocene (Rage and Ford, 1980); 6, Quercy in France (cf. Eopelobates), late Eocene (Crochet et al., 1981); 7, Hoogbutsel, Hoeleden, and Boutersem TGV in Belgium (E. bayeri), MP 21, early Oligocene (Smith, 2003); 8, Sieblos in Germany (Eopelobates sp.), early Oligocene (Gaudant, 1985); 9, Rott in Germany (E. anthracinus), MP 30, late Oligocene (Parker, 1929); 10, Bechlejovice in Czech Republic (E. bayeri), late Oligocene (Špinar, 1952, 1972); 11, Oberleichtersbach in Germany (Eopelobates sp.), MP 30, late Oligocene (Böhme, 2008); 12, Dolnice in Czech Republic (Eopelobates sp.), MN 4, early Miocene (Hodrová, 1987b); 13, Sandelzhausen in Germany (Eopelobates sp.), MN 5, early Miocene (Böhme, 2010); 14, Devínska Nová Ves in Slovakia (E. bayeri), middle Miocene (Hodrová, 1988); 15, Suchomasty in Czech Republic (Eopelobates sp.), MN 10, late Miocene (Hodrová, 1987a); 16, Volchaya Balka in Russia (Eopelobates aff. E. bayeri), MN 11, late Miocene (this paper); 17, Osztramos 1 in Hungary (Eopelobates sp.), MN 14, Pliocene (Venczel, 2001); 18, ?Ivanovce in Slovakia (? Eopelobates cf. bayeri), MN 15, Pliocene (Hodrová, 1981); 19, ?Węże 1 in Poland (Eopelobates sp.), MN 15, Pliocene (Młynarski, 1961, 1962; Sanchíz and Mlynarski, 1979); and 20, ?Rębielice Królewskie 1 in Poland (Eopelobates sp.), MN16, Pliocene (Sanchíz and Mlynarski, 1979). Data on taxonomic composition of Eopelobates are based mainly on Roček et al. (2014). The unconfirmed occurrences are denoted by a question-mark.

 

 
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Two pelobatid frogs from the late Miocene of Caucasus (Russia)

Elena V. Syromyatnikova

Plain Language Abstract

Disarticulated bones of spadefoot toads (family Pelobatidae) are described from the late Cenozoic (late Miocene) of the Volchaya Balka and the Gaverdovsky localities of Russia. Two pelobatid frogs, extant Pelobates and extinct Eopelobates, which rarely occur together, are both found in the Volchaya Balka locality. Among them, Pelobates represents the oldest record of this genus with the pustular cranial sculpture, a characteristic of the Pliocene–Recent species.

Resumen en Español

Dos anuros Pelobatidae del Mioceno tardío del Cáucaso (Rusia)

Se describen los restos desarticulados de Pelobatidae del Mioceno tardío (Turoliense temprano, MN 11) de las localidades deVolchaya Balka y Gaverdovsky (Cáucaso septentrional, Rusia). Los registros de Pelobates y Eopelobates de la localidad de Volchaya Balka corresponden a los primeros registros del Mioceno tardío, y también el registro de coexistencia en una misma área no dudoso, para estos géneros. Los restos de Pelobates descritos se caracterizan por un tipo pustuloso de esculturación craneal, que sólo se conocía previamente en formas desde el Plioceno hasta la actualidad. Este registro documenta que la esculturación pustulosa en Pelobates es al menos tan antigua como del Mioceno tardío, al menos durante la transición Vallesiense-Turoliense (aproximadamente 9-8 millones de años).

Palabras clave: Anura; Eopelobates; Mioceno tardío; Pelobates; Pelobatidae; Rusia

Traducción: Enrique Peñalver (Sociedad Española de Paleontología)

Résumé en Français

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Translator: Antoine Souron

Deutsche Zusammenfassung

Zwei pelobatide Frösche aus dem späten Miozän des Kaukasus (Russland)

Es werden disartikulierte Pelobatidae-Überreste aus dem späten Miozän (frühes Turolium, MN 11) aus der Volchaya Balka und Gaverdovsky Lokalität (nördlicher Kaukasus, Russland) beschrieben. Die Funde von sowohl Pelobates als auch Eopelobates aus der Volchaya Balka Lokalität sind die ersten spätmiozänen und die letzten zweifelsfreien Nachweis ihrer Koexistenz in dieser Region. Die beschriebenen Pelobates-Funde sind durch eine pustulöse Cranialstruktur charakterisiert, die bisher nur bei Formen aus dem Pliozän bis heute bekannt war. Dieser Nachweis dokumentiert das Auftreten einer pustulösen Struktur bei Pelobates bereits im späten Miozän, zumindest aber während der Vallesium-Turolium Transition (ca.9–8 Ma).

Schlüsselwörter: Anura; Eopelobates; spätes Miozän; Pelobates; Pelobatidae; Russland

Translator: Eva Gebauer

Arabic

Translator: Ashraf M.T. Elewa

 

 

authorElena V. Syromyatnikova. A. A. Borissiak Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul., 123, Moscow, 117997 Russia; Zoological Institute, Russian Academy of Sciences, Universitetskaya nab., 1, St. Petersburg, 199034 Russia. This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.

Elena Syromyatnikova graduated from St. Petersburg State University (St. Petersburg, Russia) in 2009 and received her PhD in 2012 at Zoological Institute of RAS. She has been working at Zoological Institute since 2002 and at Borissiak Paleontological Institute of RAS since 2015. Her interests are mainly focused on Neogene amphibians and reptiles.