Lophoplax sextuberculata Takeda and Kurata, 1984

Shaga, I Bevin, Priya, K, Ramar, Selvakumar, Srinidhi, S, Mohan, G Chandra, Ranganathan, Sukanya, Moulvi, S M M & Mani, Bhuvaneswari, 2023, A Small Collection of Subtidal Crabs (Crustacea: Decapoda: Brachyura) from the Palau Islands Collected by Dredging, Bulletin of the National Museum of Nature and Science. Series A, Zoology 49 (1), pp. 7-42 : 28-30

publication ID	https://doi.org/10.50826/bnmnszool.49.1_7
DOI	https://doi.org/10.5281/zenodo.13826525
persistent identifier	https://treatment.plazi.org/id/1B153E3A-FF90-FFAC-F1E5-CD345877FC78
treatment provided by	Felipe (2024-06-17 17:09:32, last updated 2024-11-25 18:32:22)
scientific name	Lophoplax sextuberculata Takeda and Kurata, 1984
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Lophoplax sextuberculata Takeda and Kurata, 1984 View in CoL

( Fig. 9C View Fig )

Lophoplax sextuberculata Takeda and Kurata, 1984, p. 200 View in CoL , figs. 14–16.─Takeda and Marumura, 1995b, p. 87, fig. 1. ─ Marumura and Kosaka, 2003, p. 47, pl. 7 fig. 41.─Takeda and Komasu, 2018, 176, fig. 6H.

Lophoplax aff. sextuberulata Takeda and Kurata : Takeda and Marumura, 1995a, p. 4, pl. 1 figs. 7–8.

Material examined. Entrance to Toagel Mid in Arangel Channel, Babelthuap I., Palau Is., dredged, 30–40 m in depth, with coralline algae; 1 ovig.♀ (cb 5.2×cl 4.0 mm), NSMT-Cr 30992; June 19, 1980; K. Baba leg.

Remarks. This small ovigerous female agrees well with the female holotype and two male paratypes found in stomach contents of roundspot goatfish/sidespot goatfish, Parupeneus pleurostigma (Bennett) from the Ogasawara Islands. In the original description, otherwise, a male from Tanega-shima Island in the south of Kyushu was also recorded as the paratype. In the specimens from the Ogasawara Islands as well as the present ovigerous female, the carapace dorsal surface is ornamented only with a transverse row of six, weakly raised, bare areolets behind the front-orbital margin. Takeda and Marumura (1995b), however, mentioned on the variations of the areolets on the carapace dorsal surface in three Japanese localities. In the specimens from the Kii Peninsula and Tanega-shima Island, the carapace dorsal surface is ornamented, in addition to six areolets behind the front-orbital margin, with two transverse rows of four and three areolets at level of the gastric and cardiac regions, respectively; in a female from Ie-jima Island in the Ryukyu Islands, it is almost impossible to locate the posterior seven areolets.

The carapace anterolateral margin is armed with three tubercular teeth tipped each with a short stiff seta; the third tooth is similar to, but much smaller than the first and second teeth.

The genus Lophoplax is composed of L. bicristata Tesch, 1918 , L. sculpta ( Stimpson, 1858) , L. takakurai Sakai, 1935 , and L. sextuberculata Takeda and Kurata, 1984 , because L. teschi Serène, 1971 was transferred to Serratocoxa Ng, 1987 and then to Cryptolutea Ward, 1936 (Ng et al., 2008). Takeda and Kurata (1984) and Takeda and Marumura (1995b) considered that Pseudocryptocoeloma symmetrinudus Edmondson, 1951 , is to be transferred to Lophoplax , but at present, Pseudocryptocoeloma is considered to be generically distinct from Lophoplax , with two species, P. parvus Ward, 1936 (type species) from Queensland, Australia, and P. symmetrinudus from Samoa and the Ryukyu Islands ( Edmondson, 1951; Marumura and Takeda, 2012; Maenosono, 2019).

Distribution. Previously known only from Japanese waters (Kii Peninsula, Wakayama Prefecture, 80–100 m in depth; Tanega-shima Island, ca. 70 m in depth; Ie-jima Island in the Ryukyu Islands, 70 m in depth; Ogasawara Islands), and now the Palau Islands, 30–40 m in depth.

References

Edmondson, C. H. 1951. Some central Pacific crusta- ceans. Occasional Papers of Bernice P. Bishop Museum 20: 183 - 243.

Maenosono, T. 2019. Report on nine rare pilumnid crabs (Crustacea: Decapoda: Brachyura) collected from southern Japan, including three new records. Fauna Ryukyuana 48: 19 - 44 (in Japanese with English abstract).

Marumura, M. and A. Kosaka 2003. Catalogue of brachyuran and anomuran crabs collection donated by the late Mr. Seiji Nagai to the Wakayama Prefectural Museum of Natural History. Wakayama Prefectural Museum of Natural History, pp. 12 - 73, pls. 1 - 8 (in Japanese).

Marumura, M. and M. Takeda 2012. Taxonomic studies on the crabs of the Nagai Collection preserved in the Wakayama Prefectural Museum of Natural History III. Species new to Japan (3). Journal of Teikyo Heisei University 23: 189 - 197 (in Japanese with English abstract).

Ng, P. K. L. 1987. The Indo-Pacific Pilumnidae II. A revi- sion of the genus Rhizopa Stimpson, 1858, and the status of the Rhizopinae Stimpson, 1858 (Crustacea, Decapoda, Brachyura). Indo-Malayan Zoology 4: 69 - 111.

Ng, P. K. L. and P. F. Clark 2010. Two new species of Notonyx A. Milne-Edwards, 1873 (Crustacea: Decapoda: Brachyura: Goneplacidae) from the Philippines and Fiji. Zootaxa 2509: 30 - 38.

Sakai, T. 1935. New or rare species of Brachyura, collected by the lMisagoz during the zoological survey around the Izu-Peninsula. Science Reports of the Tokyo Bunrika Daigaku (B) 2: 63 - 88, pls. 6 - 8.

Serene, R. and T. D. Pham 1957. Note sur Tetralia nigrifrons Dana 1852. Annales de la Faculte des Sciences, Universite de Saigon 1957: 107 - 131, pls. 1 - 3.

Serene, R. 1971. Observations preliminaires sur des brachyoures nouveaux ou mal connus du Sud-est Asiatique (Crustacea Decapoda). Bulletin du Museum National d`Histoire Naturelle, Paris (2) 42: 903 - 918, pls. 1 - 6.

Stimpson, W. 1858. Prodromus descriptionis animalium evertebratorum quae in Expeditione ad Oceanum Pacificum Septentrionalem, a Republica Federata missa, Cadwaladaro Ringgold et Johanne Rodgers Ducibus, observavit et descripsit. Pars V. Crustacea Ocypodoidea. Proceedings of the Academy of Natural Sciences of Philadelphia 9: 93 - 110.

Takeda, M. and Y. Kurata 1984. Crabs of the Ogasawara Islands. VII. Third report on the species obtained from stomachs of fishes. Bulletin of the National Science Museum, Tokyo, (A) 10: 195 - 202.

Takeda, M. and M. Marumura 1995 a. Rare crabs from the west coast of the Kii Peninsula, central Japan (II). Nankiseibutu 37: 1 - 7 (in Japanese with English summary).

Takeda, M. and M. Marumura 1995 b. Emendatory notes on Lophoplax suxtuberculata Takeda et Kurata (Crustacea, Decapoda, Brachyura). Bulletin of the National Science Museum, Tokyo (A) 21: 87 - 91.

Tesch, J. J. 1918. The Decapoda Brachyura of the Siboga Expedition. II. Goneplacidae and Pinnotheridae. Siboga-Expeditie 39 c 1: 149 - 295, pls. 7 - 18.

Ward, M. 1936. Crustacea Brachyura from the coasts of Queensland. Memoirs of the Queensland Museum 11: 1 - 13, pls. 1 - 3.

Figures

Fig. 9. A: Gaillardiellus rueppellii (Krauss), ♂ (NSMT-Cr 30985; cb 8.8×cl 6.6mm). B: Metaxanthops acutus Serène, ♂ (NSMT-Cr 30987; cb 6.8×cl 5.5mm). C: Lophoplax sextuberculata Takeda and Kurata, ovig.♀ (NSMT-Cr 30992; cb 5.2×cl 4.0mm). D: Vellumnus pygmaeus (Takeda), ♂ (NSMT-Cr 30994; cb 5.7×cl 4.5mm). E: Chlorodiella corallicola Miyake and Takeda, ovig.♀ (NSMT-Cr 30980; cb 4.8×cl 3.2mm). F: Chlorodiella xishaensis Chen and Lan, ♂ (NSMT-Cr 30983; cb 8.0×cl 5.7mm).