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Representative images of Alcian blue staining of the head cartilages are presented in three views. Ventral view is taken at a deeper focus from the dorsal side. Abbreviations: bh, basihyal; cb, ceratobranchials; ch, ceratohyal; ep, ethmoid plate; hs, hyosymplectic; m, Meckel's cartilage; not, notochord; pch, parachordal; pq, palatoquadrate; tr, trabeculae.
