Fig. 1

A dissected male spiny dogfish (Squalus acanthias), showing the soft tissues identified in MGGC 1976 (G. cuvieri). a The head in left dorsolateral view with the skin removed. b The endocranial cavity in dorsal view with the chondrocranial roof removed. c The abdominal region in ventral view. d The abdominal region in right ventrolateral view. Abbreviations: 2 dc, second dorsal constrictors; ad, adductor mandibulae; cu, cucullaris; d, diencephalon; ep, epaxial muscles; es, endolymphatic sac; i, intestine; ie, inner ear; ll, left liver; mo, medulla oblongata; nc, nasal cavity; ol, optic lobe; op, olfactory peduncle; rl, right liver; sp, spiracle; st, stomach; sv, spiral valve; t, telencephalon; te, testis