FIG. 5 in A new Placoderm fish (Acanthothoraci) from the Early Devonian Jauf Formation (Saudi Arabia)

FIG. 5. — Endocranium of Arabosteus variabilis n. gen., n. sp. as preserved in the holotype (MNHN.F.1992-6-132): A, ventral view; B, reconstruction. Arrows indicate anterior. Abbreviations: IV, trochlear nerve foramen; V, trigeminal nerve foramen; V1, foramen for trigeminal nerve profundus branch; V+VII, trigemino-facial duct; VI, abducens nerve canal and foramen; VII hm, foramen for hyomandibular branch of facial nerve; VIII, acoustic nerve canal; IX, glossopharyngeus nerve tract; X, vagus nerve canal; X1, foramen of the vagus nerve anterior branch; c.e, cranial cavity; c.v.ju, jugular vein canal; c.v.pit, pituitary vein canal; d.art, dermal articular area; fo.hy, hyoidean fossa; fo.pbr, peribranchial fossa; my6, myodome for abducens-innervated eye muscle; orb, orbit; pr.apo, anterior postorbital process; pr.gl, glenoid process; pr.ppo, posterior postorbital process; pr.sv, supravagal process; ru, utricular recess; sac, sacculus; v.hm, hyoid veins foramina. Scale bars: 1 cm.