Fig. 2 A in Evolution and diversity of ram-suction feeding in damselfishes (Pomacentridae)

Fig. 2 A model of the morphological basis of the capacity to generate suction pressure in the buccal cavity (Carroll et al. 2004). The model allows one to relate morphological variation among fish individuals and species to relative capacity for generating suction pressure. EPAXcsa cross-sectional area of the epaxial muscle, EP epaxial muscle, Lin moment arm of the EP, Lout moment arm of the buccal cavity, PMX premaxillary, S-PT joint between the supracleithrum and the postemporal of the pectoral girdle, SI suction index. The cylinder represents the buccal cavity