First record of two species of parthenopid crabs (Crustacea: Decapoda: Parthenopidae) from Korean waters Author Lee, Seok Hyun Author Park, Jae Hui Author Ko, Hyun Sook text Journal of Species Research 2016 2016-10-31 5 3 359 363 http://dx.doi.org/10.12651/jsr.2016.5.3.359 journal article 10.12651/JSR.2016.5.3.359 2713-8615 13145749 Pseudolambrus lobatus ( Flipse, 1930 ) ỄǕÑŔöNj (ṳAE) Lambrus ( Pseudolambrus ) lobatus Flipse, 1930: 48 , 53, fig. 37. Parthenope ( Pseudolambrus ) ozakii : Sakai, 1969: 257 , fig. 6; 1976: 277, pl. 94, fig. 2. Pseudolambrus lobatus : Ng et al. , 2008: 131 (list). Material examined. 1♂ (cl 7.2 mm, cw 7.3 mm), Korea : Munsum in Jeju Island , 28 Oct 2014 , Park JH , SCUBA diving in about 20m in depth . Description. Carapace ( Figs. 1B , 3A, B ) partly broken, 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. 362 JOURNAL OF SPECIES RESEARCH Vol. 5, No. 3 D A C B Fig. 3. Pseudolambrus lobatus ( Flipse, 1930 ) , male (cl 7.2 mm, cw 7.3 mm). A, Left half of carapace; B, Lateral view of carapace; C, Left cheliped; D, Third left ambulatory leg. Scale bars: A­D = 2 mm. missing right branchial region, subtriangular, depressed, as long as broad; regions indistinct; gastric and cardiac regions each with conical tubercle, gastric and cardiac regions connected saddle like ridge; branchial region flattened, depressed; hepatic margin rounded as lobe; epibranchial margin expanded, convex, dividet into 6 rectangular teeth by narrow fissures; lateral posterior margin with 7 triangular unequal sized teeth; posterior margin produced. Front rounded triangular, directed obliquely downward, concaved and depressed medially. Left cheliped ( Fig. 3C ) robust; merus subrectangular, with 4­5 lamelliform teeth on outer and inner margins; propodus subrectangular, 1.5 times longer than broad, inner margin tuberculated; movable finger curved, 2 small triangular teeth on cutting margin; fixed finger missing. Third ambulatory leg ( Fig. 3D ) short, slender; merus with 6 triangular teeth on anterior margin and 3 teeth on posterior margin; carpus with 2 lamelliform teeth on anterior margin; propodus with tooth on anterior and 2 larmelliform teeth on posterior margins; dactylus with spinules distally. Color. Generally reddish orange. Habitat. Broken shelly and sandy bottom at intertidal region. Distribution. Indonesia , Philippines , Japan and now Korea . Remarks. Pseudolambrus lobatus ( Flipse, 1930 ) is the first species in the genus Pseudolambrus Paul’son, 1875 from Korean waters. The genus Pseudolambrus is composed of 15 species ( Ng et al. , 2008 ) and distinguished from other partheonpid genera by having entirely fused hepatic region and a postobital tooth on the carapace, not constricted hepatic and branchial regions, and short chelipeds ( Sakai, 1976 ). Pseudolambrus lobatus is different from other congeneric species by having a carapace with produced hepatic lobe, an enormous sized with a large lobe on proximal part of right cheliped, and a left cheliped with crossed dactyli ( Sakai, 1976 ). Althought the present specimen does not have a right cheliped and a fixed finger of the left cheliped, characteristics of the carapace and the left cheliped agree with Sakai (1976) ’s description of this species.