Parhyale penicillata

Parhyale penicillata Shoemaker

Parhyale fascigera penicillata Shoemaker, 1956:350–351, fig. 2g–i.

DIAGNOSIS.—All spines on outer ramus of uropod 3 apical and contiguous, though several spines somewhat facial and subterminal, inner ramus fully articulate. Palp of maxilla 1 uniarticulate. Hand of male gnathopod 1 expanded, bearing 2 enlarged spines in tandem at defining corner, palm weakly setose; palm and posterior margin of hand on male gnathopod 2 of approximate equal length, distinct, palm lined with short spines. Article 2 of pereopod 5 with broad, rounded posteroventral lobe. Peduncle of uropod 1 with enlarged apicolateral spine, outer ramus of both uropods 1–2 naked dorsally. Peduncle of antenna 1 poorly setose ventrally; articles 4–5 of peduncle on antenna 2 with dense but short tufts of ventral setae. Coxa 3 with protruding subsharp posterior lobe. Epimera 2–3 protruding weakly posteroventrally, epimeron 3 strongest.

DESCRIPTION.—Male gnathopod 2 hand with up to 9 setae in posterior acclivity; locking spines on pereopods 3–5 accompanied by up to 4 setae in large adults but setae absent elsewhere, occasionally pereopod 5 with 3 locking spines and 3 setae; gnathopods 1–2 each with 3 recurved posterior spines on article 2; female coxae 2–4 narrower anteroposteriorly than in male and posterior cusps slightly sharper on coxae 2–3, cuticle with scattered alate slit-pits each with a setule, surrounded by simple setules (seen as holes on Figure 66: QE5) and very finely punctate or frosted matrix on cuticular surface, on dorsum of pleonites slit-pits with slightly elevated rims; epimera with frosted surface but bearing only simple bulbar setules (Shoemaker found no setules on P. fascigera).

VOUCHER MATERIAL.—KNO 6: male “a,” 7.8 mm (illus.); female “n,” 6.1 mm (illus.).

DISTRIBUTION.—Gulf of California: Bahfa Kino, Topolobampo, La Paz, 0 m.