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n.1.(Anat.) The anterior of three principal cartilages in the fins of some fishes.
References in periodicals archive ?
Regarding the genus Benthobatis, there is available information on the neurocranium, hyomandibula, branchial arches, scapulocoracoid, propterygium, synarcual, pelvic girdle and clasper (Carvalho 1999a, Rincon et al.
Total pectoral-fin radials 106-107 (105-107); propterygium 41-42 (40-41), mesopterygium 21 (19-20), metapterygium 44 (46).