Pelobatidae, Bonaparte, 1850
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publication ID |
https://doi.org/ 10.26879/772 |
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persistent identifier |
https://treatment.plazi.org/id/03FD514F-EC59-FFF7-FB94-FAD413CF2884 |
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treatment provided by |
Felipe |
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scientific name |
Pelobatidae |
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Pelobatidae View in CoL indet.
Figure 3.12 View FIGURE 3 -15
Material. Volchaya Balka locality: four scapulae (GIN 1143-233–236); four ilia (GIN 1143-237–240). Gaverdovsky locality: one premaxilla (GIN 1144- 202).
Description. The premaxilla ( Figure 3.12 View FIGURE 3 -13) is almost complete. The outer surface of the bone is smooth. The pars facialis has a narrow base and is situated near the midlength of the horizontal part of the bone (= pars dentalis). This process is relatively narrow and moderately tall, its distal portion is directed laterally. The dorsal end of the pars facialis terminates in a rounded point. From the medial surface the pars facialis is widely convex. The pars dentalis is nearly straight. The number of tooth positions on the premaxilla is 11.
The scapula ( Figure 3.14 View FIGURE 3 -15) lacks its acromial part and distal end. It is relatively robust, slightly curved and has a well-developed anterior lamina, which is concave along the anterior border. The posterior margin of the bone is only slightly concave. The processus glenoidalis is almost complete and well separated from the main corpus of the bone. The crista supraglenoidalis is massive and it is as long as the processus glenoidalis.
Comments. The described premaxilla shows the characteristics (i.e., narrow pars facialis positioned close to the midpoint of the pars dentalis), which generally correspond to some Eopelobates (e.g., E. anthracinus ) and Pelobates . It differs from E. bayeri in which the pars facialis is close to medial end of the pars dentalis. This scapula has a broad and thin anterior lamina typical for Eopelobates , but such lamina may also be occasionally found in Pelobates , though developed to a lesser degree ( Estes, 1970). Since there are no reliable characters in the premaxilla and scapula, which allow distinguishing Eopelobates and Pelobates , we refer the described bones to Pelobatidae indet.
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