Dulzura hamakua

Eriopisa hamakua

DIAGNOSIS OF MALE.—Eyes represented by 8–9 clear facets weakly resembling ommatidia in front of light orange pigment splotch in alcohol; lateral cephalic lobes weakly protruding and lacking anteroventral notch; antenna 1 as long as head and body together, accessory flagellum 2-articulate, flagellum of antenna 2 as long as peduncular article 5 and three-fourths of article 4 together; mandibular palp long, article 3 subfalcate and strongly setose on concave margin; inner plates of maxillae 1–2 medially setose; coxae overlapping each other, coxae 1–2 longer than broad, 3–4 about as broad as long, coxa 1 rectangular, not produced or extended anteroventrally: article 4 of gnathopod 1 not inflated, article 5 much longer than broad, very densely setose posteriorly and laterally but unlobate, article 6 slender, rectangular, palm nearly transverse, dactyl short but fitting spinose palm; gnathopod 2 much larger than 1, article 5 short, stout, slightly inflated, article 6 very elongate and slender, palm from lateral view appearing to occupy entire posterior margin of hand, densely setose, dactyl about half as long as hand and slightly sinuous along inner margin, palm mediodistally with 3 spines and bearing defining bulge with 2 spines at apical extent of dactyl, palm medially with weak excavation; pereopods 1–2 with slender article 2; article 2 of pereopods 3–5 rectangular and relatively slender, posteroventral corners with sharp tiny cusp but not lobate, remainder of pereopodal articles slender; uropod 1 with large distolateral peduncular spine, outer ramus of uropod 2 slightly shorter than inner ramus, peduncle of uropod 2 with comb-row of spines on mediodistal end; (uropod 3 unknown); pleonal epimera 1–2 with small sharp posteroventral tooth and nearly straight posterior margins, epimeron 3 with large obtusely rounded posterior extension bearing sharp cusp on posterodorsal corner, oblique upper margin with 3 setules, ventral margin spinose; pleonite 4 with small dorsolateral setule, 5 with dorsolateral spinule on each side; telson thin dorsoventrally, of medium length but slightly broader than long, fully cleft, lobes less tilted than in E. laakona, new species, each apex with obtusely conical projection guarded on each side by 3 spines, middlemost spine of each triad longest; branchiae broadly ovate and pyriform, with narrow necks.

HOLOTYPE.—Bishop Museum collection, catalog number 7273, male 4.0 mm. Unique.

TYPE-LOCALITY.—JLB Hawaii 2, open sea off W end of Pearl Harbor, Oahu, 4–5 m, sand, encrustations, 29 January 1967.

RELATIONSHIP.—The absence of uropod 3 does not seriously detract from the placement of this species in Eriopisa, but relationships with several other species are clouded; however, the shape of pleonal epimeron 3 is so far unique in the genus.

Gnathopods have a slight relationship to those of E. philippensis (Chilton) and E. seurati Gauthier, but article 4 of gnathopod 1 is not swollen.

The right mandibular molar of E. hamakua has a seta and a flake.

DISTRIBUTION.—Hawaiian Islands.