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Fig. 9 | BMC Evolutionary Biology

Fig. 9

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

Fig. 9

Brain and labyrinth endocast anatomy of Acipenser brevirostrum (FMNH 113538). a lateral view; b interpretative drawing of a; c dorsal view; d interpretative drawing of c; e ventral view; f interpretative drawing of e; g left lateral closeup of bony labyrinth and intramural diverticula; h interpretative drawing of g; i closeup of dorsal view of bony labyrinth and intramural diverticula; j interpretative drawing of I. major cranial nerves in yellow, intramural diverticula in purple. Abbreviations: I, olfactory nerve; II, optic nerve; III, oculomotor nerve; IV, trochlear nerve; V, trigeminal nerve; VII, facial nerve; IX, glossopharyngeal nerve; X, vagus nerve; asc, anterior semicircular canal; aur, cerebellar auricle; cc, crus communis; ep, epiphysis; hsc, horizontal semicircular canal; hyp, hypophyseal chamber; nao, narial opening; nocc, spinooccipital nerve; psc, posterior semicircular canal; sac, saccular recess; tel, telencephalon; vl, vagal lobe. Scale bar equals 2 cm

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BMC Ecology and Evolution

ISSN: 2730-7182

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