Priscosyrrhoe priscis (J. L. Barnard 1967)

Priscosyrrhoe priscis (J. L. Barnard)

Austrosyrrhoe priscis J. L. Barnard, 1967:157–160, figures 52 i–k, 78.

DESCRIPTION.—Rostrum large, medium, sharp; coxa 3 with acute anteroventral corner, posterior margin weakly excavate; coxa 4 relatively large, thick, subquadrate and scarcely comma-shaped; gnathopod 2 with palm, gnathopods each with only one palmar spine; article 2 of pereopod 5 moderately expanded, subtruncate posteroventrally; outer rami of uropods 1–2 simple; telson entire, if not obscurely trifoliate; epimeron 3 with sharp posteroventral tooth below sinus; pleonites 1–5 each with dorsal tooth.

Article 6 of pereopods 1–2 slightly tumid.

Baja California, 842–1720 m.

Pseudotiron Chevreux

Pseudotiron Chevreux, 1895:166–170.—Stebbing, 1906:284.

DIAGNOSIS.—Forehead protuberant, lateral cephalic lobe not sharp; eyes absent; mandible with palp, molar of medium size, columnar and triturative; mouthparts basic; articles 1–2 of antenna 1 basic; coxa 1 ordinary; coxae 3–4 pelagont or weakly so or not pelagont in P. coas; gnathopods simple, lacking distinctive spines; dactyl of gnathopod 2 normal; pereopods 3–5 typically elongate but short in P. coas, article 2 of pereopod 5 typically rounded posteroventrally but truncate in P. longicaudatus; pleonites 1–3 typically denticulate dorsally but apparently smooth in P. golens; uropod 3 greatly exceeding apices of uropods 1–2, peduncle short; telson elongate, deeply cleft. Pleonite 6 elongate.

Uropod 1 not reaching apex of uropod 2 (see Tiron).

TYPE-SPECIES.—P. bouvieri Chevreux (1895).

The cyphos angle (modified from Bowman and McCain, 1967) on the forehead refers to the generally acute angle between the anteroposterior cephalic axis and the oblique anteroventral margin of the lateral cephalic lobe.