. Bulletin of the Natural History Museum Zoology. REVISED CLASSIFICATION FOR CERTAIN CIRRHITOID GENERA. Fig. 1 The urohyal of:A. Paracirrhites forsteri; Cirrhitidae; left lateral view (BMNH : 119). B. Chironemus marmoratus; Chironemidae; left lateral and ventral views. (BMNH :28). C. Aplodactylus punctatus; Aplodactylidae; left lateral and ventral views. (BMNH : 157). D. Dactylophora nigricans; Cheilodactylidae; left lateral view. (BMNH :8). Relative to other figures, this bone has been rotated through 90° to the left; arrow indicates dorsal prominence. Scale
. Bulletin of the Natural History Museum Zoology. REVISED CLASSIFICATION FOR CERTAIN CIRRHITOID GENERA. Fig. 1 The urohyal of:A. Paracirrhites forsteri; Cirrhitidae; left lateral view (BMNH : 119). B. Chironemus marmoratus; Chironemidae; left lateral and ventral views. (BMNH :28). C. Aplodactylus punctatus; Aplodactylidae; left lateral and ventral views. (BMNH : 157). D. Dactylophora nigricans; Cheilodactylidae; left lateral view. (BMNH :8). Relative to other figures, this bone has been rotated through 90° to the left; arrow indicates dorsal prominence. Scale in millimetres. Drawn by Gordon Howes. type can be correlated with one of the five family groups recognised by Regan (1911), these will be referred to as the cirrhitid, latrid, chironemid, aplodactylid and cheilodactylid types respectively. The cirrhitid type (Fig. 1A) appears to be a plesiomorphic form, one fundamentally similar to that found in several basal percoids (see Kusaka, 1974; also personal observations). The latrid urohyal (Fig. 2) differs markedly from the cirrhitid type, and also shows slightly more intrafamilial variation, particularly with regard to its posterior margin's degree of indentation, the extent to which the ventral margin is produced bilaterally into a narrow or broader shelf, the extent to which the bone is produced ventrally, and whether the bone's upper margin is sharp or somewhat flattened. Like the cirrhitid type, the latrid urohyal is also of a pleisomorphic form, one occurring in such basal percoids as the Serranidae and Centropomidae (Kusaka, 1974; Greenwood, 1976: 39, fig. 21, and other personal observations). Departure from the basal percoid form of urohyal is most pronounced in the chironemid, aplodactylid and cheilodac- tylid types of bone. In chironemids (Fig. IB) the bone is shallow, the ventral margin greatly flattened and expanded bilaterally to form a broad shelf, while the dorsal margin is also noticeably flattened and bilaterally
Size: 1594px × 1568px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bhlconsortium, bookc, bookcentury1900, bookcollectionbiodiversity
