Liagore pulchella, Ng, Peter K. L. & Naruse, Tohru, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.180048 |
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DOI |
https://doi.org/10.5281/zenodo.6251322 |
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persistent identifier |
https://treatment.plazi.org/id/4B0A2C5C-D262-FF97-C6CC-F0A1FBBAF997 |
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treatment provided by |
Plazi |
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scientific name |
Liagore pulchella |
| status |
sp. nov. |
Liagore pulchella View in CoL , new species
( Figs. 1 View FIGURE 1 , 3 View FIGURE 3 a, 4)
Material examined. Holotype: male (45.4 × 32.9 mm) ( MNHN), stn. EP4, off Santo Island, Vanuatu, 15°19'46.3''S 167°7'0.4''E, 89–109 m, in tangle net, coll. SANTO Expedition, 12 September 2006. Paratypes: 2 males (51.5 × 37.5 mm, 41.9 × 31.0 mm), 2 females (44.2 × 31.8 mm, 27.7 × 37.8 mm) ( MNHN), same data as holotype; 2 males (44.9 × 33.3 mm, 46.7 × 34.0 mm), 2 females (38.0 × 27.9 mm, 38.2 × 27.8 mm) ( ZRC 2007.0642), stn EP15, off Santo Island, Vanuatu, 15°21'58.8''S 167°1'7.1''E, 103–105 m, in tangle net, coll. SANTO Expedition, 17 September 2006; 2 males (44.3 × 32.9 mm, 44.9 × 32.9 mm) ( MNHN), 2 males (45.4 × 32.9 mm, 47.8 × 35.4 mm) ( ZRC 2007.0643), 2 males (40.9 × 29.9 mm, 42.9 × 31.3 mm), 1 female (43.3 × 31.2 mm) ( NSMT), stn EP18, off Santo Island, Vanuatu, 15°19'50.7''S 167°7'6.6''E, 81–102 m, in tangle net, coll. SANTO Expedition, 18 September 2006.
Comparative material. Liagore rubromaculata : 3 males (33.6 × 24.9 mm – 36.4 × 27.0 mm) ( ZRC 1998.215), Tashi Fishing Port, Ilan County, northeastern Taiwan, coll. P. K. L. Ng, 3–4 August 1996; 1 male (36.8 × 26.8 mm), 1 female (30.5 × 22.3 mm) ( ZRC 1995.626), northern Taiwan, coll. C. H. Wang, 1990s; 1 male (41.1 × 30.1 mm) ( ZRC 1970.3.9.3), Keelung, northern Taiwan, coll. Institute of Fisheries Research, 1963; 3 males (15.3 × 10.9 mm – 29.5 × 21.5 mm), 3 ovigerous females (26.1 × 19.2 mm – 32.7 × 23.6 mm) ( ZRC 1997.744), South China Sea, Tungkang Port, Kaohsiung, southwestern Taiwan, coll. P. K. L. Ng, 5 August 1996; 1 male (23.8 × 17.3 mm) ( ZRC 1998.6405), South China Sea, near Singapore, coll. Hee Huat, 16 September 1983; 1 male (16.7 × 12.3 mm), 1 female (15.4 × 11.3 mm) ( ZRC 1995.956), Gulf of Carpentaria, northwestern Queensland, Australia, coll. CSIRO “Southern Surveyor”, 21 February 1992; 2 males (18.9 × 14.0 mm, 14.8 × 11.2 mm), 2 females (20.6 × 15.3 mm, 15.7 × 11.8 mm) ( ZRC 2002.0512), Nansha, South China Sea, 45 m, coll. 4 April 1960. Liagore erythematica : 1 juvenile male ( ZRC 1970.1.10.28), Djalandhi, Java, Indonesia, coll. R. Serène, 1963; 3 males (35.5 × 25.2 mm – 37.6 × 26.6 mm), 1 female (34.7 × 24.5 mm) ( ZRC 2002.346), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. J. C. Y. Lai et al., 2–3 September 2001; 1 female (35.5 × 25.1 mm) ( ZRC 2001.1064), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. P. K. L. Ng, 17 February 2001; 2 males (31.2 × 22.3 mm, 35.2 × 24.5 mm), 1 female (34.4 × 24.5 mm) ( ZRC 1998.1132), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. S. Chaitiamvong, December 1998; 7 males (22.3 × 16.0 mm – 33.2 × 23.3mm), 1 female (32.2 × 22.7 mm) ( ZRC 2000.784), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. N. K. Ng et al., 17–20 January 2000; 4 males (26.7 × 19.2 mm – 36.1 × 26.1 mm) ( ZRC 2000.374), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. P. K. L. Ng, 24 August 1999; 11 males (14.3 × 10.4 mm – 41.0 × 28.5 mm), 11 females (18.5 × 13.3 mm – 34.4 × 24.4 mm) ( ZRC 2000.834), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. P. K. L. Ng, 3–6 May 2000; 1 male ( ZRC 1999.155), Andaman Sea, Pichai Fish Port,
Phuket, western Thailand, coll. P. K. L. Ng, April 1999; 1 male (28.9 × 40.6 mm) ( ZRC 1998.1236), Ranong, Tubli, western Thailand, coll. 2 July 1991; 1 male (24.0 × 33.8 mm) ( ZRC 1992.10520), Andaman Sea, between Penang and Langkawi islands, northern Peninsular Malaysia, coll. C. P. How & C. O. Lau, 12 November 1991; 3 males (24.4 × 34.0 mm – 26.3 × 37.0 mm), 3 females (22.2 × 31.9 mm – 25.9 × 37.4 mm) ( ZRC 2001.0873), fish landing opposite Vellar Estuary, Tamil Nadu, south India, coll. A. S. Fernando, 24 March 2001; 2 males (17.7 × 25.3 mm, 22.4 × 31.8 mm), 4 females (20.5 × 29.1 mm – 27.8 × 40.0 mm) ( ZRC 2002.0081), Andaman Sea, Pichai Fish Port, Phuket, western Thailand, coll. J. C. Y. Lai, 22–25 August 2002.
Diagnosis. Carapace ( Fig. 1 View FIGURE 1 ) oval, CW 1.35–1.39 (mean 1.37, n = 16) times CL, dorsal surface convex longitudinally, transversely, smooth, regions ill-defined. Frontal margin with short median wide, rounded sublateral notch, lateral angle ( Fig. 3 View FIGURE 3 a) swollen ventrally; infraorbital margin with inner half swollen, outer half strongly excavated downwards; orbit relatively large, fronto-orbital width 0.50–0.54 (mean 0.52, n = 16) times CW. Anterolateral margin entire, junctions between anterolateral and posterolateral margins rounded, subparallel; posterolateral margins strongly convergent posteriorly. Epistome ( Fig. 3 View FIGURE 3 a) with posterior margin widely concave, with median short projection; short longitudinal sutures on middle and lateral half, posterior end of suture not clearly opened. Merus of third maxilliped with distal inner half excavated, with submedian projection. Chelae ( Fig. 1 View FIGURE 1 ) equal, larger in males; carpus wide, produced outwards as well as inwards, outer angle protruded. Ambulatory legs ( Fig. 1 View FIGURE 1 ) slender; first, second longest; distal end of merus almost reaching to outer projection of carpus of cheliped when leg is stretched along merus of laterally stretched cheliped; length from dactyli to carpi of first, second legs as long as CL. Abdomen with third to fifth segments fused. G1 ( Fig. 4 View FIGURE 4 a–c) slender, gently curving outwards, distal part with short line of short setae on dorsal outer margin, setae directed posteriorly; G2 ( Fig. 4 View FIGURE 4 d) short.
Coloration. Unlike the two known congeners, Liagore pulchella , new species, lacks any red dots on the peach-coloured dorsal surfaces of the carapace and pereiopods ( Fig. 1 View FIGURE 1 ). Inner surface of the palm, the distal part of the cheliped fingers and ventral surfaces are white.
Etymology. The name is derived from the Latin pulchella for beautiful or lovely. The name is used as adjective.
Remarks. Liagore pulchella , new species, can be clearly distinguished from two congeners by the absence of spots on the dorsal surfaces of the carapace and pereiopods ( Figs 1 View FIGURE 1 , 2 View FIGURE 2 ; Guinot 1971: Figs. 3 View FIGURE 3 , 4 View FIGURE 4 ). Other than the marked colour differences, L. pulchella can be differentiated from L. rubromaculata by the presence of a low and rounded lobe on the anterior portion of the junction with the posterolateral margin ( Fig. 1 View FIGURE 1 ) (absent in L. rubromaculata , Fig. 2 View FIGURE 2 a), more concave outer half of the infraorbital margin ( Fig. 3 View FIGURE 3 a) (less concave in L. rubromaculata , Fig. 3 View FIGURE 3 b), a longer projection on the outer angle of the cheliped carpus ( Fig. 1 View FIGURE 1 ) (weaker in L. rubromaculata , Fig. 2 View FIGURE 2 a), the relatively longer ambulatory legs, with the distal end of the merus of the first ambulatory leg almost reaching to the outer projection of the cheliped carpus when stretched along the merus of a laterally stretched cheliped ( Fig. 1 View FIGURE 1 ) (some distance from the outer projection in L. rubromaculata , Fig. 2 View FIGURE 2 a), the closed submedian sutures of the posterior margin of the epistome ( Fig. 3 View FIGURE 3 a) (suture with posterior end opened in L. rubromaculata , Fig. 3 View FIGURE 3 b) and the shape of the G1, being gradually but continuously curving outwards and the dorsal surface of the distal tip with a line of short setae that are directed outwards ( Fig. 4 View FIGURE 4 a–c) (curvature of the G1 not constant, lined setae long, directed anteriorly in L. rubromaculata ) (see also Guinot 1971: Figs. 2 View FIGURE 2 , 4 View FIGURE 4 ; Ng & Chen 2004: Figs. 4 View FIGURE 4 a, b, 5a–d). These morphological characters, especially the conditions of the infraorbital margins and the epistomes, show minor variations, but they can still be distinguished by remaining morphological characters.
Liagore erythematica View in CoL is morphologically closer to L. pulchella View in CoL in their relatively longer ambulatory legs, wider cheliped carpus with the long outer projection, closed posterior margins of their epistomes and the strongly concave outer half of their respective infraorbital margins ( Figs. 1 View FIGURE 1 , 2 View FIGURE 2 b, 3a, c; Guinot 1971: Fig. 2 View FIGURE 2 ). In addition to the pronounced colour differences, the characters separating these two species are the relative width of the basal antennal article (wider in L. pulchella View in CoL , Fig. 3 View FIGURE 3 a than in L. erythematica View in CoL , Fig. 3 View FIGURE 3 c) and the shape of the G1 (gradually but continuously curving outwards for L. pulchella View in CoL , Fig. 4 View FIGURE 4 a-c, proximal third of G1 sharply bent in L. erythematica View in CoL ) (see also Ng & Chen 2004: Fig. 5e, f). The fronto-orbital width of L. pulchella View in CoL ( Fig. 1 View FIGURE 1 ) is also slightly wider than in L. rubromaculata View in CoL and L. erythematica View in CoL ( Fig. 2 View FIGURE 2 ).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.