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. 2020 May 15;237(3):543–555. doi: 10.1111/joa.13210

Figure 2.

Figure 2

Ventral views of the skull in the same aged (41–44 days post‐fertilization) Alizarin‐stained larvae: (A) control larva at stage 52, snout–vent length (SVL) 18 mm – maxilla is missing, premaxilla lacks vomerine process, vomer and palatopterygoid, both bearing multi‐row dentition, are separate; (B) thyroid hormone (TH)‐treated (1 ng mL‐1) larva at stage 53, SVL 15.5 mm – premaxilla and maxilla are fused and bear vomerine processes which meet the vomerine edentate plate. Note the occurrence of the vomero‐palatopterygoid bearing one‐row dentition along its medial edge; (C) TH‐treated (2 ng mL‐1) larva at stage 52, SVL 15 mm – palatine is absent, vomer bears a small vomerine bar, pterygoid is enlarged and adult‐shaped. VB, vomerine bar; v‐palpt, vomero‐palatopterygoid; for other abbreviation definitions see Figure 1. Scale bars are 1 mm.