Macrobrachium mammillodactylus (Thallwitz 1892)

Macrobrachium mammillodactylus (Thallwitz, 1892)

Palaemon idae var. mammillodactylus Thallwitz, 1892:15 [type locality: Luzon, Philippines, or northern Celebes (acc. to Holthuis, 1950a: 150)].

Palaemon (Eupalaemon) Wolterstorffi Nobili, 1900b: 1 [type locality: Surabaja, eastern Java].

Palaemon philippinensis Cowles, 1914:340, pl. 2: fig. 2 [type locality: San Juan and Pasig rivers, near Manila, Philippines].

?Palaemon talaverae Blanco, 1939a:168, pl. 2 [type locality: Lake Sampaloc, San Pablo, Laguna Province, Luzon, Philippines].

Macrobrachium mammillodactylus.—Holthuis, 1950a: 148, fig. 34.

DIAGNOSIS.—Rostrum variable, not overreaching antennal scale, dorsal margin somewhat sinuous, rostral formula: 2–3 + 9–12/2–5, dorsal teeth more widely spaced posteriorly than anteriorly; branchiostegal suture not extending posteriorly beyond hepatic spine; telson with posterior apex not overreaching posterolateral spines; antennal scale with lateral margin straight or concave; 1st pereopod with chela less than as long as carpus; 2nd pereopods subequal in length and similar in form, palm subcylindrical, fingers not densely pubescent, partially dentate on opposable margins, gaping slightly, not widely, to quite as long as palm, latter nowhere densely pubescent, chela 1–1 times as long as carpus, palm to quite as long as carpus, carpus as long as to twice as long as merus, not longitudinally grooved; 3rd pereopod overreaching antennal scale by more than length of dactyl, propodus not profusely spinose or scaly but bearing numerous minute spines; maximum postorbital carapace length more than 40 mm.

RANGE.—Philippines and Indonesia.