Pycnomma semisquamatum Rutter 1904

photo by J. Van Tassell
San Carlos, MX

IDENTIFICATION

Head Pores - Cephal head canal with pores B',F,H' perhaps D; no preopercle canal pores.

Scales - Scales are large and ctenoid posteriorly, becomming smaller anteriorly and cycloid; extending forward to under 6th dorsal spine, some variation; transverse scales - 8; lateral series - 21; four basicaudal scales present dorsal and ventral most largest.

Fins - D1 - VII, filamentous (?); D2 - 11; pectoral 16(15-17); anal- 10; caudal segmented 17; pelvic I,5 - 5th ray unbranched, fins seperate, frenum absent, extending to anus

Head - Maxilla extending to anterior of pupil; anterior nnostril erect tube; posterior nostril erect tube, shorter than anterior; interorbital wide greater than pupil diameter; no rostral frenum;

Papillae - A transverse pattern with three vertical rows anterior to row b; row 5i/6i continuous and at the anteriorof row b; row d divided into two sections.

Color - Generally mottled brownish; side of body with about 4-5 diffuse blackish, hourglassshaped bars, and black bar at base of caudal fin; a pair of creamy yellow bars below spinous dorsal fin; head with white spots, and diagonal brown bars radiating from eye; a small black spot at bottom of gill cover; median fins with white spots on rays, and white margin on both dorsal fins. (A&R 1994)

Distribution - Pacific, Baja Calafornia Gulf of California (A&R 1994)

Habitat - Inhabits crevices and ledges of weed-covered rocky reefs (A&R 1994)

Notes -