Pasiphaea tarda Kroyer 1845

Pasiphaea tarda Krøyer, 1845

(Figure 4)

Pasiphaea tarda Krøyer, 1845: 453; Matthews & Pinnoi 1973: 139; Hayashi, 2006a: 234 –237; De Grave & Fransen, 2011: 259. Pasiphaea princeps — Rathbun, 1904: 23.

Pasiphaea principalis Sund, 1913: 6; De Man 1920: 2.

Material Examined. REVIZEE, St. 0 506, 19°42.716’S, 38°36.497’W, 935m, 1 female (70.44mm), MNRJ13737; St. 0 524, 19°43.663´S, 38°39.838’W, 925m, 1 male (47.33mm), MNRJ14605; St. 0 535, 19°58.936’S, 39°38.657’W, 1002m, 1 female (68.27mm), MNRJ26957. HABITATS, St. 13, 989m, 1 female (78.73mm), MNRJ26956.

Diagnosis: Body soft, but not fragile. Rostrum short, with basal slit; apex distinctly overreaching anterodorsal margin of carapace. Carapace acutely carinate with shallow depression at each side of rostral base (Fig. 4A, B). Branchiostegal sinus deep; branchiostegal spine small, marginal (Fig. 4A). First pereopod with 4–8 spines on merus, unarmed on ischium and basis, posterodistal angle of basis produced, but not dentiform (Fig. 4C). Second pereopod with 13–24 spines on merus, 0–1 spine on ischium and 1–7 spines and posterodistal tooth on basis (Fig. 4D). First abdominal somite with dorsal carina on distal half; second to fifth abdominal somites carinate; sixth abdominal somite with dorsal carina on proximal half (Fig. 4E, F). Telson grooved in dorsal midline, posterior margin moderately or deeply forked, with 8–12 pairs of spines (Fig. 4G, H); telson shorter than sixth somite. Pleurobranch on the eighth thoracic somite (modified from Hayashi, 2006a).

Distribution: Type locality: Atlantic Ocean, South Greenland (unknown location). Southern Canary Islands, South Carolina (American coast) and Angola. New record: Brazil (Espírito Santo). Depth: 250 – 2400m.

Remarks: Pasiphaea tarda is included in P. alcocki species group and differs from its close related species Pasiphaea multidentata Esmark, 1866 by the basis of second pereopod with 2–4 spines (Fig. 4D) vs. more than 6 spines (Fig. 4A) (Matthews & Pinnoi, 1973).