Comprehensive Description

provided by Smithsonian Contributions to Zoology
Macrobrachium cowlesi Holthuis, 1950

Palaemon sp. Cowles, 1914:397, pl. 3: fig. 11.

Macrobrachium cowlesi Holthuis, 1950a:257 [type locality: Manila water supply, Luzon, Philippines].

DIAGNOSIS.—Rostrum not reaching level of distal end of antennular peduncle and falling far short of that of distal extremity of antennal scale, dorsal margin slightly convex, rostral formula: 6–7 + 8/2, dorsal teeth subequally spaced; branchiostegal suture not extending posteriorly beyond hepatic spine; telson with posterior apex not overreaching posterolateral spines; 2nd pereopods unequal in length and dissimilar in form; major 2nd pereopod with palm compressed, fingers not concealed by dense pubescence, bearing teeth and tubercles on opposable surface, gaping, subequal to palm in length, palm bearing dense patches of pubescence at extreme proximal end, chela 3 times as long as carpus, palm 1 times as long as carpus, carpus shorter than merus, without longitudinal grooves; minor 2nd pereopod with fingers less than 1 times as long as palm; 3rd pereopod overreaching antennal scale by length of dactyl and of propodus, latter not covered with spines or scales, maximum postorbital carapace length 20 mm.

RANGE.—Known only from two syntypes from the Manila water supply, Philippines, and from seven specimens recorded from Sumba in the Lesser Sunda Islands of Indonesia by Holthuis (1978b).

*14. Macrobrachium equidens (Dana, 1852)

Palaemon equidens Dana, 1852a:26 [type locality: Singapore].

Palaemon sundaicus var. bataviana De Man, 1897:784 [type locality: Djakarta, Java].

P[alaemon] (Eupalaemon) sundaicus var. brachydactyla Nobili, 1899:238 [type locality: Ambon].

P[alaemon] (Eupalaemon) acanthosoma Nobili, 1899:242 [type locality: “Katau” [?= Binaturi River, near Fly River], Papua New Guinea].

Palaemon (Eupalaemon) sundaicus var. baramensis De Man, 1902:770 [type locality: Baram River, Sarawak].

Palaemon (Eupalaemon) nasutus Nobili, 1903a:9, 1 fig. [type locality: Singapore].

Palaemon sulcatus Henderson and Matthai, 1910:289, pl. 16: fig, 4 [type locality: Cochin, southern India].

Palaemon sundaicus.—Cowles, 1914:355, pl. 2: fig. 3 [not P. sundaicus Heller, 1862].

Palaemon delagoae Stebbing, 1915:74, pl. 16 [type locality: Delagoa Bay. Mozambique].

Urocaridella borradailei Stebbing, 1923:8, pl. 14 [type locality: Mhlatuze River, Natal].

Macrobrachium equidens.—Holthuis, 1950a: 162, fig. 36.—Johnson, 1973:283.

DIAGNOSIS.—Rostrum reaching nearly as far as or beyond level of distal end of antennal scale, dorsal margin convex or slightly sinuous, rostral formula: 2–4 + 7–9/4–7, dorsal teeth unequally spaced, usually with wider gaps near posterior and anterior ends of series; branchiostegal suture not extending posteriorly beyond hepatic spine; telson with posterior apex not overreaching posterolateral spines; antennal scale with lateral margin straight or convex; 1st pereopod with chela as long as carpus; 2nd pereopods subequal in length, similar in form, palm subcylindrical, fingers covered with soft, dense pubescence, not dentate on opposable margins, not gaping (in full-grown males), about as long as palm, latter completely naked, without pubescence, chela longer than carpus, palm – as long as carpus, carpus 1–1 as long as merus, without longitudinal grooves; 3rd pereopod overreaching antennal scale by length of dactyl, propodus partially pubescent, not covered with spines or scales; maximum postorbital carapace length about 30 mm.

MATERIAL.—INDONESIA. Pulau Sebatik, Borneo; [4°10′N, 117°45′E]; 1 Oct 1909: 3 males [12.8–21.2].

RANGE.—South Africa, southern India to Fukien Province, China, Philippines, Indonesia, and Palau Islands eastward to New Britain, the Solomon Islands, and Nigeria [possibly introduced]; high salinity brackish and salt water, rarely in pure fresh water.
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bibliographic citation
Chace, Fenner Albert, Jr. and Bruce, A. J. 1993. "The caridean shrimps (Crustacea: Decapoda) of the Albatross Philippine Expedition 1907-1910, Part 6: Superfamily Palaemonoidea." Smithsonian Contributions to Zoology. 1-152. https://doi.org/10.5479/si.00810282.543