Photis hawaiensis J. L. Barnard 1955

Photis hawaiensis J. L. Barnard

Photis hawaiensis J. L. Barnard, 1955, pp. 35–37, figs. 18, 19.

DIAGNOSIS OF MALE.—Head with medium-sized ocular lobes, eyes horizontally ovate, filling ocular lobe and projecting into head proper, ommatidia much larger than in other Hawaiian photises and partially discontiguous, all not perfectly spherical, eyes pale eosin in alcohol when viewed under high power; antennae 1–2 as long as head and pereon together, article 3 of antenna 1 equal to article 1 or slightly shorter, article 2 scarcely longer than either; coxa 1 elongate-rectangular and with 1 long and several short setae, coxae 2–4 broader than 1 and thus relatively less elongate, essentially asetose, coxae 3–4 with ventrolateral stridulating ridges, coxa 3 with set of ventromedial ridges also, coxae weakly rounded ventrally, coxa 5 with normally broad anterior lobe; gnathopod 1 with articles 5 and 6 equal to each other in length, article 5 broadly truncate posteriorly, article 6 normally but broadly ovate, palm weakly convex (drawing of Barnard, 1955a, poor), undefined, bearing 1 medial spine near middle, dactyl long, fitting palm theoretically, with small teeth and crenulations on inner edge; gnathopod 2 very large, article 2 with immense anterodistal mammilliform hump armed with stridulating ridges, article 3 quadrate from lateral view and bearing medial keel projecting mediad (shown folded down in drawing), article 4 medially setose (setae shown by pits only in figure), article 5 very broad, unlobate medioposteriorly, but bearing large, setose posterolateral lobe and anterior rounded setose keel, setae very heavy, article 6 broad but tapering distally, palm occupying full posterior margin of hand and defined by medioproximal tooth, palm distally with 2 sinuses and 2 cusps, dactyl as long as hand, inner edge smooth except for weak distal tooth and setae; pereopods 1–2 with article 4 especially turgid anterodistally; pereopod 3 fairly stout for genus but not as stout as that of P. aina, new species, dactyl with 1 sharp accessory cusp, pereopod 4 similar to 3 but article 2 narrower, pereopod 5 dactyl with 1 slender accessory cusp; uropods 1–2 with very small sharp leaflike ventrodistal tooth between rami, inner ramus of uropod 1 lacking marginal spines, otherwise rami of uropods 1–2 with 1 marginal spine each, apices of each with jewel-like nails; outer ramus of uropod 3 of variable length relative to peduncle, but about three-fourths as long as mat peduncle, article 2 well developed and barrel-shaped, apical spines long, inner ramus 20–25 percent as long as outer ramus; telson triangular, bearing deep anterolateral notch on each side to form shape of leaf, the 2 acclivities of the notches apparently representing nobs normally found in females or juveniles; pleonal epimera all with softly rounded posteroventral corners, epimeron 2 with 2 weak ventral setae.

FEMALE.—Gnathopod 2 smaller than that of male, article 2 with medium-sized mammilliform lobe, article 5 with narrower posterior lobe, article 6 expanded, palm slightly oblique, with weak sinus near dactyl, then cusp bordered by deep sinus followed by transverse sinuous margin with quadrate defining corner and bearing small, medial, submarginal spine, dactyl slightly shorter than palm, with 2 inner teeth.

MATERIAL.—Same as J. L. Barnard (1955a).

DISTRIBUTION.—Hawaiian Islands.