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Fig. 1 | Zoological Letters

Fig. 1

From: Evolution of the vertebrate neurocranium: problems of the premandibular domain and the origin of the trabecula

Fig. 1

a and b Schematized composition of crown gnathostome cranium. Early (a) and late (b) stages of development. Precartilaginous condensation and cartilages are shown in dots. Based on reference [8]. c and d. Early (c) and late (b) stages of chondrocranium in Salmo. Based on reference [42]. e, eye; eth, ethmoidal plate; Fen. bas.-caps., basicapsular fenestra; Fe, hypophys., hypophyseal fenestra; nas, nasal capsule; ns, nasal sac; nt, notochord; occ, occipital cartilage; opt, optic capsule; otc, otic capsule; ov, otic vesicle; pc, parachordals; tr, trabecula; ve, vertebrae

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