Macrobrachium minutum (J. Roux 1917)

Macrobrachium minutum (J. Roux, 1917)

Palaemon minutus J. Roux, 1917:599, pl. 27: figs. 1–3 [type locality: Sentani Lake, northeastern Irian Jaya (West New Guinea)].

Macrobrachium minutum.—Holthuis, 1950a: 140, fig. 32.

DIAGNOSIS.—Rostrum slightly overreaching antennal scale or not, dorsal margin faintly sinuous, rostral formula: 3 + 9–10/4, 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 slightly concave; 1st pereopod with chela as long as carpus; 2nd pereopods slightly unequal in length but nearly similar in form, palm subcylindrical, fingers not covered with dense pubescence, partially dentate on opposable margins, not gaping, – as long as palm, latter without any dense pubescence, chela less than as long as carpus, palm about as long as carpus, carpus 1 times as long as merus, without longitudinal grooves; 3rd pereopod overreaching antennal scale by length of dactyls and of propodus, propodus not profusely spinose or scaly; maximum postorbital carapace length less than 15 mm.

RANGE.—Known only from the type locality in Sentani Lake, Irian Jaya.