Ampithoe guaspare J. L. Barnard 1979

Ampithoe guaspare

DIAGNOSIS OF MALE.—Epimera 2–3 flat posteriorly, posteroventral corners rounded-quadrate. Article 5 of gnathopod 1 shorter than article 6, posterior lobe truncate, extended as sharp tooth distally, article 6 subrectangular, palm oblique, poorly developed, defined by strong spine, dactyl overlapping palm. Gnathopod 2 with oblique and weakly excavate palm defined by medium sized subacute projection, anterodistal margin of hand tumid, weakly produced, heavily setose, dactyl slender, fitting palm, article 5 elongate, with moderately developed, broad, blunt posterior lobe, article 2 with large blunt lobe at anterodistal corner laterally. Antenna 1 longer than antenna 2, both pairs slender, peduncle of antenna 1 reaching apex of article 4 on peduncle of antenna 2, antenna 2 moderately setose, flagellum slender, about three-fourths as long as article 4–5 of peduncle together. Lateral apical lobule of lower lip projecting strongly, medial lobule very broad, blunt, scarcely projecting. Coxa 1 produced forward. Peduncular process of uropod 1 absent. Body poorly pigmented, eyes red in alcohol.

FEMALE.—Gnathopod 1 with article 5 shorter than in male and less strongly produced apicoposteriorly; gnathopod 2 small, article 5 shorter than in male, palm oblique, slightly concave.

DESCRIPTION.—Lower lip as shown for Ampithoe ramondi by J. L. Barnard (1965a, fig. 15e), pereopods generally similar but articles 2, 6, and 7 of pereopod 7 shown herein; outer ramus of uropod 3 as in figure 16j of Barnard (1965a), but inner ramus with only 3 spines and 6 setae.

HOLOTYPE.—USNM 169014, male “m,” 6.24 mm (illus.).

TYPE-LOCALITY.—DAW 27, Galapagos Islands, Isla Santa Cruz, Academy Bay, 16 February 1962, intertidal, rock wash.

VOUCHER MATERIAL.—Type-locality, female “f,” 6.32 mm (illus.).

RELATIONSHIP.—This species is very similar to Ampithoe ramondi and might appear to be a youthful stage of that species; but in the Galapagos Islands A. ramondi is much smaller than this species when the hand of male gnathopod 2 is fully developed with deep incision and blunt tooth. The palm of male A. guaspare remains scarcely excavate, the hand is broadened and the anterodistal tumidity remains weaker than in A. ramondi.

MATERIAL—GAL 114, 116; DAW 27, 31, 35, 40.

DISTRIBUTION.—Galapagos Islands, Academy Bay, Isla Santa Cruz, Darwin Bay, Tower Island; intertidal.