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Figure 10 | BMC Evolutionary Biology

Figure 10

From: A new xinjiangchelyid turtle from the Middle Jurassic of Xinjiang, China and the evolution of the basipterygoid process in Mesozoic turtles

Figure 10

Braincase and palatoquadrate of select basal turtles and a pan-pleurodire showing the presence or absence of a basipterygoid process. A, Proganochelys quenstedti (SMNS 16980); B, Kayentachelys aprix (MCZ 8917); C, Heckerochelys romani (PIN 4561–2); D-E, Mongolochelys efremovi (PIN, uncatalogued) in ventral and oblique posterior view; F, Kallokibotion bajazidi (NHMUK R4925); G, Meiolania platyceps (NHMUK R682); H, Chubutemys copelloi (MPEF-PV1236); I, Notoemys laticentralis (cast of MOZP 2487). Abbreviations: bo: basioccipital, bpt: basipterygoid process, bs: basisphenoid, ex: exoccipital, fca: fenestra caroticus, fpccc: foramen posterius canalis carotici cerebralis, fpcci: foramen posterius canalis carotici interni, fpccp: foramen posterius canalis carotici palatinum, ips: intrapterygoid slit, ipv: interpterygoid vacuity, pr: prootic, pt: pterygoid, pte: processus pterygoideus externus.

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