Fig. 3
From: Sequence of chondrocranial development in basal anurans—Let’s make a cranium
D. scovazzi, 3D reconstructions of the head skeleton of larvae showing the cartilaginous development during Stages A2, A3, D2, D4, D6 and C4 (top to bottom) in ventral (a) and dorsal (b) view. The 3D reconstructions are color-coded, according to the distinct stage of cartilaginous development: “Light gray” means Anlagen are visible as mesenchymal cell clusters; “light blue” means that condensed precartilaginous cell clusters containing chondroblasts are visible, “dark blue” means that the respective cartilage contains chondrocytes rich in cytoplasm and bordered by a distinct perichondrium. Sizes were adjusted. amc, admandibular cartilage; apch, anterior process of ceratohyal; appq, articular process palatoquadrate; asp, ascending process; bb, basibranchial; bh, basihyal; cbI-IV, ceratobranchial I–IV, ch, ceratohyal; co, orbital cartilage; hp, hypobranchial plate; ir, infrarostral cartilage; mc, Meckel´s cartilage; mppq, muscular process palatoquadrate; mtt, medial tectal taenia; oc, otic capsule; pc, parachordal cartilage; pcI, proximal commissure I; pcIII, proximal commissure III; ppch, posterior process ceratohyal; ppsr, posterior process suprarostral cartilage; pq, palatoquadrate; pr, pars reuniens; rpmc, retroarticular process Meckel´s cartilage; sa, suprarostral ala; sb, subocular bar; sc, suprarostral corpus; sr, suprarostral cartilage; tcI-III, terminal commissure I-III; th, trabecular horn; upb, urobranchial process