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Fig. 5 | BMC Evolutionary Biology

Fig. 5

From: Internal cranial anatomy of Early Triassic species of †Saurichthys (Actinopterygii: †Saurichthyiformes): implications for the phylogenetic placement of †saurichthyiforms

Fig. 5

Coronal views of tomographic renderings of different regions of the braincase and parasphenoid of †Saurichthys sp. (NHMD_157546_A); a posterior view of occipital region; b interpretative drawing of a; c posterior view of otic region; d interpretative drawing of c; e anterior view of orbitotemporal region; f interpretative drawing of e; g posterior view of ethmoidal region; h interpretative drawing of g; gray shade indicates elements of dermal origin. Abbreviations: I, olfactory nerve; II, optic nerve; III, oculomotor nerve; IV, trochlear nerve; Vmx, maxillary ramus of trigeminal nerve; IX, glossopharyngeal nerve; X, vagus nerve; apal, palatine artery (parabasal canal); aps, pseudobranchial artery; asc, anterior semicircular canal; asp, ascending process of parasphenoid; crsf, craniospinal fossa; crsp, craniospinal process; damy, dorsal anterior myodome; dlf, likely origin of dilatator and/or hyomandibular protractor muscles; epo?, epiotic-like ossification; fb, fossa bridgei; hmf, hyomandibular facet; ica, ascending branch of internal carotid artery; ios, interorbital septum; jc, jugular canal; lacp, potential origin of levator arcus palatini muscle; occ, occipital crest; oph, opthalmic artery; otp, otic process; psp, parasphenoid; pspk, parasphenoid keel; tsf, tectosynotic fossa; vamy + prof?, ventral anterior myodome and potential course of profundus nerve. Scale bar equals 1 cm

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