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Figure 2


Fig. 2. Morphology of the hagfish feeding apparatus (HFA) in the retracted position and methods for measuring HFA length in (A) lateral view, (B) ventral view and (C) dorsal view. ABP, anterior basal plate; CM, clavatus muscle; DPM, deep protractor muscle; DP, dental plate; MBP, middle basal plate; PBP, posterior basal plate; PC, perpendicularis cartilage; PM, perpendicularis muscle; VK, ventral keel; SPM, superficial protractor muscle; TM, tubulatus muscle. Dental plate cartilages (not shown in C) are covered by oral mucosa.