Nanopilumnus heterodon ( Sakai, 1934 )

deVries, Maaike, McGillis Hall, Linda, Dainty, Katie, Fan, Mark, Tscheng, Dorothy, Hamilton, Michael & Trbovich, Patricia, 2024, Ten Species of Crabs of the Families Acidopsidae, Aphanodactylidae and Pilumnidae (Crustacea: Decapoda: Brachyura) from the Ogasawara Islands, Japan, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (4), pp. 155-169 : 161

publication ID	https://doi.org/10.50826/bnmnszool.50.4_155
DOI	https://doi.org/10.5281/zenodo.14680495
persistent identifier	https://treatment.plazi.org/id/03C6D170-FFC7-3B6D-28AE-5F8FAAD00D78
treatment provided by	Felipe (2025-01-17 17:53:59, last updated 2025-01-17 18:02:12)
scientific name	Nanopilumnus heterodon ( Sakai, 1934 )
status

Treatment

Nanopilumnus heterodon ( Sakai, 1934) View in CoL [Jn: Kawari-kebukagani]

( Fig. 4D–E View Fig )

Pilumnus heterodon Sakai, 1934, p. 307 View in CoL , fig. 19; 1976, pp. 484 (in key), 488 (English vol.), p. 301 (Japanese vol.), fig. 262a, pl. 174 fig. 3. — Sankarankutty, 1962, p. 114, figs. 48–50. — Muraoka, 1998, p. 44. — Takeda & Manuel, 2000, p. 159, fig. 4B. — Kato & Okuno, 2001, p. 131, 1 unnumbered fig.

Pilumnus barbatus A. Milne-Edwards, 1873 View in CoL : Balss, 1938, p. 57. — Sakai, 1939, p. 538. — Takeda & Miyake, 1968, p. 9, figs. 1d–f, 2.

Nanopilumnus heterodon View in CoL : Ng et al., 2008, p. 141 (in list). — Trivedi et al., 2018, p. 60 (in list).

Material examined. ɹ Chichi-jima Is. —Omura Beach (27°05′35′′N, 142°11′38′′E), Chichi-jima I., 12 m, 1 ˁ (cb 7.9×cl 5.7 mm), NSMT-Cr 32394, 13-XI-2013, coll. by H. Komatsu.

Remarks. ɹ This small species is characterized by the club-shaped hairs of filthy appearance covering the carapace, chelipeds and ambulatory legs; the hairs are variable in length, but basically separated into short and long types. As shown in Fig. 4D–E View Fig , of three anterolateral teeth of the carapace behind the external orbital tooth, the first two are prominent and elongate, each with a minute horny tip, protruding from the hairs; the first originates from behind the outer part of the supraorbital margin, directing anterolaterally; the second is similar to the first in size and shape, but directed more anteriorly and weakly curving forwards; the third is small, acute at tip, and disguised by the hairs. The differences of the carapace anterolateral armature of this species and the close relative, N. barbatus (A. Milne-Edwards, 1873) , were illustrated by Sakai (1976).

Distribution. ɹ Known from Japan, the Philippines, Singapore and the Palau Islands in the West Pacific Ocean, and the Nicobar Islands in the eastern Indian Ocean.

References

Balss, H. 1938. Die Dekapoda Brachyura von Dr Sixten Bocks Pazifik-Expedition 1917 - 18. Goteborgs Kungl. Vetenskaps- och Vitterhets-Samhalles Handlingar (B) 5 (7): 1 - 85, pls. 1 - 2.

Kato, S. and J. Okuno 2001. Shrimps and Crabs of Hachijo Island. 157 pp. TBS-Britannica Co., Ltd., Tokyo (in Japanese).

Milne-Edwards, A. 1873. Recherches sur la faune carcinologique de la Nouvelle-Caledonie, Deuxieme partie. Nouvelles Archives du Museum d`Histoire naturelle de Paris 9: 155 - 332, pls. 4 - 18.

Muraoka, K. 1998. Catalogue of the brachyuran and anomuran crabs donated by Prof. Dr. Tune Sakai to the Kanagawa Prefectural Museum. Catalogue of the Collection in the Kanagawa Prefectural Museum of Natural History 11: 1 - 67, pls. 1 - 16 (in Japanese).

Ng, P. K. L., D. Guinot and P. J. F. Davie 2008. Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world. The Raffles Bulletin of Zoology 17: 1 - 286.

Sakai, T. 1934. Brachyura from the coast of Kyushu, Japan. Scientific Reports of the Tokyo Bunrika Daigaku (B) 1: 281 - 330, pls. 17 - 18.

Sakai, T. 1939. Studies on the Crabs of Japan. IV. Brachygnatha, Brachyrhyncha, pp. 365 - 741, pls. 42 - 111. Yokendo Ltd., Tokyo.

Sakai, T. 1976. Crabs of Japan and the Adjacent Seas. xxix + 773 pp. (English vol.); 461 pp. (Japanese vol.); 16 pp. + 251 pls. (Plates). Kodansha Ltd., Tokyo.

Sankarankutty, C. 1962. On Deapoda Brachyura from the Andaman and Nicobar Islands: 2. Family Xanthidae. Journal of Marine Biological Association of India 4: 121 - 150.

Takeda, M. and S. Miyake 1968. Pilumnid crabs of the family Xanthidae from the West Pacific. I. Twentythree species of the genus Pilumnus, with description of four new species. OHMU: Occasional Papers of Zoological Laboratory, Faculty of Agriculture, Kyushu University 1: 1 - 60, pls. 1 - 4.

Takeda, M. and M. R. Manuel 2000. Taxonomic accounts of some rare crabs new to the Philippines. In Matsuura, K. (ed.): Proceedings of the First and Second Symposia on Collection Building and Natural History Studies in Aisa. National Science Museum Monographs, Tokyo 18: 149 - 162.

Trivedi, J. N., D. J. Trivedi, K. D. Vachhrajani and P. K. L. Ng 2018. An annotated checklist of the marine brachyuran crabs (Crustacea: Decapoda: Brachyura) of India. Zootaxa 4502: 1 - 83.

Figures

Fig. 4. A–C: Pilumnus tahitensis De Man, ˁ (NSMT-Cr 32402; cb 6.2×cl 4.9 mm) from Sujiiwa-misaki, Anijima I. D–E: Nanopilumnus heterodon (Sakai), ˁ (NSMT-Cr 32394; cb 7.9×cl 5.7mm) from Omura Beach, Chichi-jima I. F: Crinitocinus alcocki (Borradaile), juv. (NSMT-Cr 323889; cb 4.7×cl 3.8mm) found in stomach contents of sidespot goatfish, Parupeneus pleurostigma (Bennett) from off Futami Bay, Chichi-jima I.

Copyright notice

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.

Taxonomy

Kingdom	Animalia
Phylum	Arthropoda
Class	Malacostraca
Order	Decapoda
Family	Pilumnidae
Genus	Nanopilumnus