Fig. 2
From: Evolution of the facial musculature in basal ray-finned fishes
Hyopalatine arch, opercular series, and associated constrictor hyoideus dorsalis of Polypterus senegalus, USNM 229760; left medial view. Abbreviation: CHD, constrictor hyoideus dorsalis. Color code: Salmon, muscle; sand, bone; blue, cartilage; white, tendon or ligament (regular connective tissue); dark grey, irregular connective tissue