Macrobrachium lorentzi (J. Roux 1921)

Macrobrachium lorentzi (J. Roux, 1921)

Palaemon (Parapalaemon) lorentzi J. Roux, 1921:596, pl. 16: figs. 1–3 [type locality: Sungai Lorentz basin, southwestern New Guinea (Irian Jaya)].

Macrobrachium lorentzi.—Holthuis, 1950a:213, fig. 44.

DIAGNOSIS.—Rostrum not overreaching antennal scale, dorsal margin distinctly sinuous, rostral formula: 3–4 + 6–10/2–4, dorsal teeth subequally spaced; branchiostegal suture not extending posteriorly beyond hepatic spine; telson with posterior apex not overreaching posterolateral spines; antennal scale with lateral margin straight or slightly concave; 1st pereopod with chela more than as long as carpus; 2nd pereopods unequal in length but similar in form, palm slightly compressed, fingers densely pubescent, fingers partially dentate on opposable margins, not gaping, 1–1 times as long as palm, latter nowhere densely pubescent, chela 1 –1 times as long as carpus, palm – as long as palm, carpus longer than merus, with shallow longitudinal groove; 3rd pereopod barely overreaching antennal scale, propodus somewhat spinose; nose; maximum postorbital carapace length about 25 mm.

RANGE.—Known only from Papua New Guinea and western New Guinea (Irian Jaya).