Macrobrachium hungi, Xuan, Nguyen Van, 2012

Xuan, Nguyen Van, 2012, Macrobrachium hungi, a new freshwater palaemonid prawn (Decapoda: Caridea: Palaemonidae) from the Tonle Sap Great Lake of Cambodia, Zootaxa 3560, pp. 32-40 : 32-34

Macrobrachium hungi , sp. nov.

( Figs 1–6 )

Material examined. Holotype: Adult full grown 3, OUMNH.ZC.2011-10-015 (tl 89, cl 20.4, rl 22.7), Τοnlė Sap Lake (13o 0’N 104o 0’E), 20/1/2003. Paratypes: 3 3: OUMNH.ZC.2011-10-016 (cl 21.3, apex of rostrum broken), OUMNH.ZC.2011-10-017 (tl 85.5, cl 20, rl 22.5), OUMNH.ZC.2011-10-018 (tl 80, cl 19, rl 20); Ƥ, OUMNH.ZC.2011-10-019 (tl 80.5, cl 17.7, rl 21.2); post ovigerous Ƥ, OUMNH.ZC.2011-10-020 (tl 77, cl 17, rl 18); ovigerous Ƥ, OUMNH.ZC.2011-10-021 (tl 62, cl 13.7, rl 15) mm. All same data as holotype.

4 3: 50 MK (tl 98.5, cl 26, rl 25); 51 MK (tl 91.5, cl 23, rl 23.7); 52 MK (tl 84, cl 19, rl 23); 53 MK (tl 81, cl 19.5, rl 19.5). 4 Ƥ: post ovigerous Ƥ, 90 MK (tl 83, cl 20.5, rl 19.5); 91 MK (tl 82, cl 19.3, rl 20.2); 92 MK (tl 78, cl 17.8, rl 18.5); ovigerous Ƥ 93 MK (tl 77, cl 17, rl 19).

Figures

FIGURE 1. Macrobrachium hungi n. sp., holotype male, cl 21 mm, tl 89 mm. A, carapace, antennule, scaphocerite (setae between dorsal and ventral teeth omitted). B, carapace and scaphocerite (paratype male, cl 20 mm, tl 85. 5 mm). C, infraorbital angle. D, epistome. E, paragnath (holotype). F, second pereiopod (male, cl 21 mm). G, fingers of holotype and distal portion of palm (outer face), the hairs on proximal basal of fingers partly removed for showing the teeth on the basal part of the cutting edge. H, fingers of the same, and distal portion of palm, inner face, the hairs on proximal basal of fingers partly removed for showing the teeth on the basal part of the cutting edge.

FIGURE 2. Macrobrachium hungi n. sp. A, first maxilliped. B, second maxilliped. C, third maxilliped. D, abdomen and telson of a male. E, telson and uropods. F, posterior part of sixth abdominal somite. G, posteroventral of sixth abdominal somite. H, distal portion of telson. I, movable spine of uropodal diaeresis of holotype. J, movable spine of uropodal diaeresis of paratype old males. K, movable spine of uropodal diaeresis of young male and ovigerous female paratypes. L, first pereiopod. M, palm of first pereiopod. N, distal end of fingers of first pereiopod, apical claw partly concealed by distal apical curvature of the cutting edge, in developed males and ovigerous females.

FIGURE 3. A, antennal scale. B, mandible. C, maxillula. D, palp of maxillula. E, maxilla. F, median process of fourth thoracic sternite. G, third pereiopod. H, dactyl and distal portion of propodus of third pereiopod. I, first pleopod male. J, second pleopod male. K, L, first and second abdominal sternite. M, distal end of palp of maxilla (in old males).