Macrobrachium heterochirus ( Wiegmann, 1836 )

Valencia, Diego M. & Campos, Martha R., 2007, Freshwater prawns of the genus Macrobrachium Bate, 1868 (Crustacea: Decapoda: Palaemonidae) of Colombia, Zootaxa 1456, pp. 1-44 : 24-25

Macrobrachium heterochirus ( Wiegmann, 1836)

Fig. 12 A–C

Palaemon heterochirus Wiegmann, 1836: 149 .

Macrobrachium heterochirus, Holthuis, 1952: 69 .— Chace & Hobbs, 1969: 106.— Chace, 1972: 20.— Escobar, 1979: 110.— Rodríguez, 1980: 122.— Rodríguez, 1981: 47.— Abele & Kim, 1989: 10.— Melo, 2003: 354.

Macrobrachium carcinus, Galvis, 1986: 447 .

(For detailed synonymy refer to Holthuis, 1952).

Material examined

Caldas: La Dorada. Corregimiento Guarinocito, 300 m asl, 19 Nov 1987, leg. S. Prada, 1 male, ICN- MHN-CR 0819.— Guarinó River, 170 m asl, 17 Dec 2002, leg. G. Galvis, 1 female, ICN-MHN-CR 2082.— Samaná, Corregimiento Norcasia, La Miel River, 560 m asl, 22 May 1992, leg. G. Galvis, 1 male, ICN-MHN- CR 1469.

Cundinamarca: Puerto Salgar, Negro River, 150 m asl, 14 Mar 1992, leg. P. Cala, 1 male, ICN-MHN-CR 2204.— Yac o p í, Guaguaquí River, 360 m asl, 29 Sep 1997, leg. G. Galvis, 1 male, ICN-MHN-CR 1668.

Chocó: Acandí, Acandí River, 1 ovigerous female, 2 juveniles, INV 768.

La Guajira: Riohacha, south of Mingueo, 45 m asl, 27 Aug 1972, leg. J. Thomerson, 1 female, ICN- MHN-CR 2119.

Magdalena: Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, 6 Jul 1983, leg. G. Galvis, 2 males, ICN-MHN-CR 0 535.

Santander: Simacota. Suárez River, 2 Mar 1973, leg. J. Vega, 1 male, ICN-MHN-CR 0053.— Santa Rosa stream, affluent of Suárez River, 22 May 1981, leg. P. Cala, 2 males, ICN-MHN-CR 1742.

Diagnosis

Rostrum sinuous, apex curved upward, shorter than scaphocerite, as long as or shorter than antennular peduncle, upper margin with 11 to 13 teeth, including 4-5 teeth completely post orbital, the 3 to 4 distal teeth straight and with more recess between them than rest of teeth, lower margin with 2 to 3 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in midspine, flanked by two pairs of spinules, internal pair about same length as midpoint, external pair shorter than midpoint. First pair of pereopods overreaching scaphocerite with total length of carpus. Second pair of pereopods elongated, prominent, similar in shape and size, with conspicuous spines and thickly pubescence on ventral margin from ischium to merus, palm on distal portion, ventral and internal base of fixed finger; overreaching scaphocerite with 1/2 of merus, merus 0.81 to 0.85 x carpus length, 0.59 to 0.63 x palm length; carpus 3.13 to 4.23 x as long as wide, 0.72 to 0.75 x palm length; palm prominent, 4.76 to 6.28 x as long as wide, and 4.0 to 5.60 x as long as high; fingers 0.63 to 0.71 x palm length, cutting edges pubescent with series of small, similar size teeth from their base to midportion.

Size. The largest male TL 113.4 mm, CL 38.4 mm; the largest female TL 83.9 mm, CL 26.1 mm; 1 ovigerous female was examined: TL 58.4 mm, CL 17.8 mm, with small and large number of eggs.

Remarks

Two males identified as Macrobrachium carcinus ( Linnée, 1758) from Santa Marta, Parque Nacional Natural Tayrona, Los Cedros, department of Magdalena (ICN-MHN-CR 0535) by Galvis (1986) are actually M. heterochirus .

Figures

FIGURE 12. Macrobrachium heterochirus (Wiegmann, 1836), male, ICN-MHN-CR 1742: A, anterior part of body, lateral view; B, telson, dorsal view; C, second pereopod, lateral view.