Jassa lilipuna

Jassa lilipuna

DIAGNOSIS.—Lateral cephalic lobe coniform, ventral margin of lobe and head sinuous; accessory flagellum 2-articulate, article 1 elongate, article 2 very small; article 3 of peduncle of antenna 1 as long as article 1; epistome weakly and bluntly produced; palp article 3 of mandible extremely clavate; inner plate of maxilla 1 simple; maxilla 2 with about 4 setae on distal half of medial margin; palp article 4 of maxilliped stout, apically setose; coxa 1 of male extending ventrally about half as far as coxa 2; latter bilobate in terminal male; coxa 5 nearly as long as coxa 4, coxae 6–7 short; gnathopod 1 of both sexes and gnathopod 2 of female similar, article 5 cup-shaped and shorter than 6, latter ovate, palm and posterior margin about equal, palm defined by 2 spines, dactyl with several flat inner serrations and lateral comb; gnathopod 2 of male initially with article 6 becoming greatly elongate while dactyl remaining short, palm almost simple and confluent with posterior margin of article 6, then posterior margin developing scant cusp bearing spine, finally in adult, dactyl elongating to full posterior length of article 6, midpalmar tooth becoming proximal medium-sized thumb, palm near dactylar hinge formed of 2 processes, 1 of medium size, 1 smaller and hemispherical, articles 2–3 weakly lobate, article 4 swollen, article 5 small, cup-shaped, not reaching free margin; pereopods 1–2 short, moderately stout, article 6 with 4 large, blunt posterior spines, 2 of them forming a locking pair; pereopods 3–5 with anterior margin of article 6 bearing large pair of locking spines and 1 other large distal spine, dactyls all bearing facial comb; outer ramus of uropod 3 with 2–3 terminal, scarcely reverted cusps, inner ramus with 1 partially immersed distal spinule; telson pointed, bearing a pair of stout dorsal spines and a pair of setules.

OTHER FEATURES.—Mandibular molar large but weakly triturative, bearing molarial flake; eyes large and clear in alcohol.

HOLOTYPE.—Bishop Museum collections, catalog number 7288, male, 1.9 mm.

TYPE-LOCALITY.—Waikiki, Oahu, in ocean seaward of aquarium, from Ulva, 11 March 1964.


MATERIAL.—Nine specimens from the type-locality on Ulva and 20 specimens from Sargassum and 4 from Padina.

DISTRIBUTION.—Hawaiian Islands.