Fig. 3.

Chondrocranium of Ptychoglossus bicolor at stage 35. Dashed lines denote subjacent cartilage. (A) Dorsal view. (B) Lateral view. Abbreviations: apps, anterior process of planum supraseptale; ar, articular; asp, ascending process of pterygoquadrate; bf, basicranial fenestra; bpl, basal plate; bpt, basipterygoid process; ch, cartilago hypochiasmatica; ec, extracolumella; fe, foramen epiphaniale; fep, fenestra epioptica; fhn, hypoglossal foramina; fo, fenestra olfactoria; fop, fenestra optica; fs, fenestra in nasal or interorbital septum; fsu, fenestra superior; is, interorbital septum; lta, lamina transversalis anterior; Mc, Meckel's cartilage; ns, nasal septum; oa, occipital arch; oc, otic capsule; onf, orbitonasal fissure; pacc, pila accesoria; pai, processus alaris inferior; pat, ascending process of tectum; pf, pituitary fossa; pla, planum antorbitale; pm, pila metoptica; pnc, paranasal cartilage; ps, planum supraseptale; ptc, parietotectal cartilage; q, quadrate; rp, rostral process; sc, sphenethmoid commisure; si, subiculum infundibuli; t, trabecula; tc, trabecula communis; te, tectum; tm, taenia medialis; tma, taenia marginalis. Scale bar: 0.5 mm.