Enoplolambrus laciniatus (De Haan, 1839)

Lee, Seok Hyun, Park, Jae Hui & Ko, Hyun Sook, 2016, First record of two species of parthenopid crabs (Crustacea: Decapoda: Parthenopidae) from Korean waters, Journal of Species Research 5 (3), pp. 359-363 : 359-360

Enoplolambrus laciniatus (De Haan, 1839)

ŭųƞöNj (ṳAE)

Parthenope (Lambrus) laciniatus De Haan, 1839 : pl. 22, figs. 2, 3; 1839: 91.

Lambrus laciniatus : Ortmann, 1893: 415; Stimpson, 1907: 29.

Lambrus laciniatus enoshimanus : Parisi, 1915: 259.

Lambrus validus : Kamita, 1936: 31 (in part).

Lambrus (Platylambrus) validus : Kamita, 1941: 81 (in part).

Parthenope (Platylambrus) laciniata : Yamaguchi and Baba, 1993: 370, fig. 125A, B.

Parthenope (Platylambrus) valdius forma laciniatus : Sakai, 1976: 269, pl. 92, fig. 1.

Lambrus intermedius : Miers, 1879: 29.

Enoplolambrus laciniatus : Ng et al., 2008: 130 (list).

Material examined. 1♂ (cl 38 mm, cw 38 mm), Korea: Jindo Is , 27 Jul 2012, Lee SH, trap in about 10 m in depth .

Description. Carapace ( Figs. 1A , 2A ) subpentagonal, as long as broad; anterior half of dorsal surface relatively smooth; regions convex; mesogastric and cardiac regions convex and large tubercle; epi­ and meso­branchial regions with ridge; exorbital tooth developed; hepatic margin defined, not fused with epibranchial margin; epibranchial margin enlarged, convex, with 4 granulated, lamella teeth; lateral posterior margin with 3 triangular teeth; posterior margin produced. Front prominent, triangular, concaved medially frontal and protogastric regions.

Chelipeds ( Figs. 1A , 2B ) symmetrical, extremely long, robust, tuberculated; merus as long as propodus, with medial ridge, outer margin with 13 unequal sized tubercles; propodus prismatic, 10­13 tubercles on angles; movable finger curved, upper margin with tubercles on decreased in size distally.

Ambulatory legs ( Fig. 2 C-F) short, flattened; posterior margins of meri and propodi of first to fourth ambulatory legs with acute tubercles; anterior margins of merus, carpus and propodus of fourth ambulatory leg carinated; distal margin of propodi and dactyli covered with setae.

Male abdomen ( Fig. 2G ) 5­segmented; third and fourth segments with transverse ridge; fifth segment with triangular tubercle. Telson triangular.

First gonopod ( Fig. 2H ) stout, prismatic, tapering distally; with truncated tip, with surrounded setae. Second gonopod ( Fig. 2I ) slender, slightly shorter than first gonopod, segmented 1/3 of proximal part, with pointed tip.

Color. Generally brown, dactyli of chelipeds and ambulatory legs black.

Habitat. Muddy sand bottom covered with broken shells at intertidal region.

Distribution. Australia, China, Japan and now Korea.

Remarks. Enoplolambrus laciniatus (De Haan, 1839) is very similar to E. valdius (De Haan, 1837) by having tuberculated carapace and chelipeds, however, they can be easily distinguished by the following characteristics. The protogastric and epibranchial regions of the carapace are relatively smooth in the former (vs. granulated in the latter), the meri of chelipeds are long in the former (vs. relatively short in the latter), and the anterior margin of the carpi and propodi of the fourth ambulatory leg are carinated in the former (vs. not carinated and with tubercles in the latter). E. laciniatus is the second recorded species in the genus Enoplolambrus in Korea.

Genus Pseudolambrus Paul’son, 1875 ỄǕÑŔöNjṩ (ṳAE)

Figures

Fig. 1. Color photographs of two parthenopid crabs. A, Enoplolambrus laciniatus (De Haan, 1839), male (cl 38 mm, cw 38 mm): B, Pseudolambrus lobatus (Flipse, 1930), male (cl 7.2 mm, cw 7.3 mm).

Fig. 2. Enoplolambrus laciniatus (De Haan, 1839), male (cl 38 mm, cw 38 mm). A, Left half of carapace; B, Left cheliped; C­F, First to fourth left ambulatory legs; G, First gonopod; H, Second gonopod; I, Male abdomen. Scale bars: A=1 cm, B=2 cm, G, H=3 mm, C­F, I=5 mm.