Latigammaropsis afra (Stebbing 1888)

Gammaropsis afra Stebbing

Gammaropsis afra Stebbing, 1888, p. 1097, pl. 113.

Eurystheus afer.—Stebbing, 1906, p. 612.—?K. H. Barnard, 1916, pp. 249–250, pl. 28, fig. 11.—K. H. Barnard, 1937, pp. 165–166, fig. 12.—Pillai, 1957, pp. 55–56, fig. 13.—J. L. Barnard, 1961, pp. 113–114, fig. 79.

DIAGNOSIS (relative to forms of G. atlantica).—Lateral cephalic lobes poorly projecting, eye weakly reniform, but not distinctly lageniform or ovate; accessory flagellum thick and 3-articulate in adults (1.9 mm); gnathopod 2 with palmar axis less oblique than in form A of G. atlantica, with small subquadrate palmar concavity, large defining tooth, palmar bulge with 2 humps, dactyl especially short and thick compared with form B of G. atlantica, and proximal inner margin with 2 small conical processes, article 6 about 1.75 times as long as broad, articles 2 and 6 with very few setae. Female gnathopod 2 of the fully developed condition as in form A of G. atlantica and spine of palm especially enlarged.

COLOR IN 2-DAY FORMALDEHYDE.—Body white, eyes brown.

MATERIAL.—JLB Hawaii 5 (15). Devaney 1 (19).

Hybrid or form intermediate with G. atlantica: Eye slightly more reniform than in typical individuals; palm much less oblique than any form of atlantica or afra, concavity narrowest, palmar bulge quadrate, proximal inner margin of dactyl with low quadrate process; color as in form B of G. atlantica; body length reaching 4 mm in contrast to 2.2 mm maximum size of G. afra.

MATERIAL.—JLB Hawaii 5 (10).

DISTRIBUTION.—East Adantic Ocean, eastward to Hawaii.