Parhyale iwasai

Parhyale iwasai Shoemaker

Hyale gracilis Iwasa, 1939:282–284, fig. 19, pl. 19 [homonym, not Bate].

Parhyale iwasai Shoemaker, 1956:356 [new name].

Hyale iwasa [sic] Bulycheva, 1957:107–109, fig. 39 [new name].

DIAGNOSIS.—One or more spines on outer ramus of uropod 3 shifted disjunctly onto dorsal margin, inner ramus unknown. Palp of maxilla 1 uniarticulate but constricted in middle. Hand of male gnathopod 1 unexpanded, thin, rectangular, apparently bearing only 1 or 2 weakly enlarged spines side by side at defining corner of palm, palm weakly setose, setae elongate; palm and posterior margin of hand on male gnathopod 2 of approximately equal length, distinct, palm sparsely lined with spines. Article 2 of pereopod 5 with broad, rounded posteroventral lobe. Peduncle of uropod 1 with ordinary apicolateral spine, outer rami of uropods 1–2 with 2 and 1 dorsal spines, respectively. Peduncle of antennae 1–2 poorly setose. Coxa 3 apparently with protuberant subsharp posterior tooth. Epimera 2–3 with weak and sharp posteroventral tooth. Article 6 of pereopod 5 with posterior spines.

RELATIONSHIP.—Shoemaker (1956:356) thought this species to be close to P. hawaiensis. At present it cannot be made a synonym of P. hawaiensis, because of the thin and normally armed hand of male gnathopod 1 and the disjunct dorsal spine on the outer ramus of uropod 3. The inner ramus of uropod 3 remains to be discovered. The posterior spines on article 6 of pereopod 5 are known only for P. iwasai and P. hawaiensis.

DISTRIBUTION.—Taiwan and southern Japan.