Osteological development of the lophiid anglerfish, Lophius gastrophysus.

概要

論文の詳細を見る
The osteological development of the head skeleton and dorsal, pectoral, and anal fin supports, are described from cleared and stained specimens of <I>Lophius gastrophysus</I> larvae, ranging from 4.6 to 21.8mm NL; the results are compared with those of juvenile (79.8mm SL) and adult (398mm SL) specimens. Tiny conical teeth are present on the premaxillary, dentary, palatine and vomer since early stage. The first three dorsal fin spines are initially positioned on the midline of body posterior to the supraoccipital, but they migrate forward with growth and become cephalic in juveniles. The forward movement of the dorsal spines is produced by the forward extension of the cartilaginous basal inside the subepidermal space. During the planktonic larval stage the pectoral fins are on the sides of body as in ordinary fishes, but they move ventrad and become leg-like in bottom living juveniles and adults. Ossification of the caudal complex of <I>L. gastrophysus</I> larvae proceeds very slowly and only the 21.8mm NL larva has an almost completely ossified caudal complex. Eight principal caudal rays are loosely attached on the posterior edge of the hypurals and no procurrent rays are present. Larvae have well developed parhypurapophysis at the mid-portion of the urostyle which transforms into keel-like structure in juveniles and adults.
日本魚類学会の論文