Macrobrachium digueti ( Bouvier, 1895 )

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 : 18-19

Macrobrachium digueti ( Bouvier, 1895)

Fig. 8 A–C

Palaemon digueti Bouvier, 1895: 159 .

Macrobrachium digueti, Holthuis, 1952: 103 .— Rodríguez, 1981: 47.— Prahl et al., 1984: 52.— Abele & Kim, 1989: 9.— Wicksten, 1989: 13.

Macrobrachium diguetti, Méndez, 1981: 73 .

(For detailed synonymy refer to Holthuis, 1952).

Diagnosis

Rostrum rather shallow, almost reaching end of antennular peduncle, upper margin with 13 to 18 teeth regularly spaced, including 4-7 teeth completely post orbital, lower margin 2 to 4 teeth; carapace smooth; abdomen smooth; telson terminal margin ending in sharp midpoint, flanked by two pairs of spinules, internal pair overreaching midpoint and external pair. First pair of pereopods overreaching scaphocerite with distal portion of carpus. Second pair of pereopods strongly different in shape and size; the larger second pereopod overreaching scaphocerite with distal portion of merus; merus as long as or slightly shorter than carpus; carpus more than 2 x as long as wide, shorter than palm length; palm strongly compressed, the ventral margin straight or slightly convex, with large, thickly pubescent area on lateral surface, 1.7 x as long as high; fingers strongly gaping when closed, cutting edges thickly pubescent, as long as palm, a prominent tooth on proximal portion of each cutting edge, followed by 1 to 2 small teeth to base of finger, and 9 to 12 placed up to tips. The females present small and numerous eggs. The diagnosis is based on ( Holthuis, 1952).

Remarks

The species Macrobrachium digueti was reported from the Calima River, department of Valle del Cauca, and the specimens were deposited at the CRBMUV by Prahl et al. (1984). In a recent examination of Prahl et al ’s material at the CRBMUV the specimens could not be found. Unfortunately, there are no additional specimens in other collections. The illustrations are taken from Holthuis (1952).

Figures

FIGURE 8. Macrobrachium digueti (Bouvier, 1895), male: A, anterior part of body, lateral view; B, small second pereopod, lateral view; C, larg second pereopod, lateral view. Modified from Holthuis (1952).