Xestopilumnus cultripollex Ng and Dai, 1997
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publication ID |
https://doi.org/ 10.50826/bnmnszool.48.4_147 |
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DOI |
https://doi.org/10.5281/zenodo.12760193 |
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persistent identifier |
https://treatment.plazi.org/id/5F30F95F-FFE5-902F-FD40-FB33FE5C5894 |
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treatment provided by |
Felipe |
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scientific name |
Xestopilumnus cultripollex Ng and Dai, 1997 |
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Xestopilumnus cultripollex Ng and Dai, 1997 View in CoL
( Fig. 13 View Fig )
Material examined. RV Hakuhō Maru KH-72-1 cruise, sta. 42, 1 Ə (CB 5.6×CL 4.7 mm), NSMT-Cr 30940.
Remarks. The male at hand is safely identified as Xestopilumnus cultripollex , which is known only by the original description ( Ng and Dai, 1997) based on five males and one subadult female from the vicinity of Hong Kong Island. All known specimens, including the present male, are small and not distinctive in the general appearance of the carapace, chelipeds and ambulatory legs, but the wholly smooth carapace, chelipeds and ambulatory legs is of distinct generic value in the genus Glabropilumnus Balss, 1933 and genera such as Gorgonariana , Lentilumnus , Serenolumnus , Xlumnus separated from Glabropilumnus by Galil and Takeda (1988).
The carapace dorsal surface ( Fig. 13A–B View Fig ) is smooth and glabrous without areolar indication, and evenly convex in both directions; the front prominently extends forward, with transverse margin and without median incision, slightly more than one-third as wide as carapace; the carapace anterolateral margin ( Fig. 13A–B View Fig ) is narrowly edged and cut into three lobes; first lobe is isolated from the less prominent external orbital angle with a short distance, and fringed with minute granules; the second lobe is small, but tooth-like and subacute at the tip, separated from the first lobe by a small but distinct notch; the third lobe obscurely isolated from the second lobe is obscurely convex and weakly convergent toward the carapace posterolateral corner. Both chelipeds ( Fig. 13D–E View Fig ) are different in size and shape; in the right, or larger cheliped in this male, the palm is stout, fairly bulged, but the left cheliped palm is compressed, with sharp lower margin. The ambulatory legs are all slender ( Fig. 13A, F View Fig ).
A small discrepancy is the absence of the fourth anterolateral lobe of the carapace, but the variation of the armature was shown with fine illustrations in the original description.
Distribution. Hitherto known from Hong Kong, and now from the southern South China Sea; subtidal to 36 m depth.
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.