Macrobrachium javanicum (Heller 1862)

Macrobrachium javanicum (Heller, 1862)

P[alaemon] javanicus Heller, 1862b:421, pl. 2: fig. 48 [type locality: Java].

Palaemon (Eupalaemon) neglectus De Man, 1905:201, pl. 15: fig. 6 [type locality: Mergui Archipelago and northeastern Sumatra].

Macrobrachium javanicum.—Holthuis, 1950a:190, fig. 38.

DIAGNOSIS.—Rostrum not reaching level of distal end of antennal scale, dorsal margin somewhat sinuous, rostral formula: 3 + 8–10/3–5, dorsal teeth subequally spaced, except posteriormost tooth often more remote; branchiostegal suture not extending posteriorly beyond hepatic spine; telson with posterior apex not overreaching posterolateral spines; antennal scale with lateral margin nearly straight; 1st pereopod with chela as long as carpus; 2nd pereopods subequal in length and rather similar in form, palm somewhat compressed, fingers without dense pubescence, dentate on opposable margins, not widely gaping, – as long as palm, latter not densely pubescent, even in part, chela twice as long as carpus, palm 1–1 times as long as carpus, carpus longer than merus, without longitudinal grooves; 3rd pereopod overreaching antennal scale by less than length of dactyl, propodus not covered with spines or scales; maximum postorbital carapace length about 32 mm.

RANGE.—Mergui Archipelago, Malaya, Thailand, and Indonesia.