Abstract
Three species of the pagurid hermit crab genus Catapaguroides A. Milne-Edwards & Bouvier, 1892, all from Japanese waters, are reported. Catapaguroides fragilis (Melin, 1939) is redescribed on the basis of the holotype and additional material from southern Japan. Diagnostic characters of this poorly known species are fully assessed. Two new species, C. bythos and C. rubromaculatus, are described and illustrated on the basis of material from upper bathyal depths off the Ryukyu Islands. Catapaguroides rubromaculatus n. sp. resembles C. fragilis and C. hirsutus Komai & Rahayu, 2013, but the characteristic shape of the ocular peduncle and the elongate male right sexual tube with an anteriorly directed distal portion readily separate C. rubromaculatus n. sp. from the latter two congeners. Catapaguroides bythos n. sp. appears close to C. mortenseni de Saint Laurent, 1968 and C. pectinipes (Lewinsohn, 1969), but the different armature of the chelipeds distinguishes C. bythos n. sp. from the latter two allies. Catapaguroides is now represented by 30 species.
References
Arima, H. (2014) Hermit Crab Illustrated. Seibundo Shinkosha Co. Ltd., Tokyo, 223 pp.
Edmondson, C.H. (1951) Some Central Pacific crustaceans. Occasional Papers of the Bernice P. Bishop Museum, 20, 185–243.
Lewinsohn, C. (1969) Die Anomuren des Roten Meeres (Crustacea: Decapoda: Paguridea, Galatheidea, Hippidea). Zoologische Verhandelingen, 104, 3–213, pls. 1, 2.
Komai, T. (2009) A new species of the hermit crab genus Catapaguroides (Crustacea: Decapoda: Anomura: Paguridae) from shallow water in the Ryukyu Islands, Japan. Species Diversity, 14, 197–205.
Komai, T. (2014) A new species of the hermit crab genus Catapaguroides A. Milne-Edwards and Bouvier, 1892 (Crustacea: Decapoda: Anomura: Paguridae) from Sagami Bay, Japan. Natural History Research, 13, 1–9.
Komai, T. & Rahayu, D.L. (2013) Species of the pagurid hermit crab genus Catapaguroides A. Milne-Edwards & Bouvier, 1892 (Crustacea: Decapoda: Anomura) from the Bohol Sea, the Philippines, with descriptions of eight new species. Raffles Bulletin of Zoology, 61, 143–188.
Komai, T. & Takeda, M. (2006) A review of the pagurid hermit crab (Decapoda: Anomura: Paguroidea) fauna of the Sagami Sea, Central Japan. Memoirs of the National Science Museum, Tokyo, 41, 71–144.
Komai, T., Yamada, Y. & Shirakawa, N. (2010) A new hermit crab species of the genus Catapaguroides A. Milne-Edwards & Bouvier (Decapoda: Anomura: Paguridae) from the Ryukyu Islands, Japan, and additional record of C. foresti McLaughlin. Zootaxa, 2690, 32–42.
McLaughlin, P.A. (1997) Crustacea Decapoda: Hermit crabs of the family Paguridae from the KARUBAR cruise in Indonesia. In: Crosnier, A. & Bouchet, P. (Eds.), Résultats des Champagnes MUSORSTOM, vol. 16. Memoires du Muséum National d’Histoire naturelle, Paris, 172, 433–572.
McLaughlin, P.A. (2002) A new species of the genus Catapaguroides (Decapoda, Anomura, Paguroidea, Paguridae) from Guam, Micronesia. Crustaceana, 75, 495–504.
https://doi.org/10.1163/156854002760095543McLaughlin, P.A. (2003) Illustrated keys to families and genera of the superfamily Paguroidea (Crustacea: Decapoda: Anomura), with diagnoses of genera of Paguridae. Memoirs of Museum Victoria, 60, 111–144.
https://doi.org/10.24199/j.mmv.2003.60.16McLaughlin, P. A., Komai, T., Lemaitre, R. & Rahayu, D.L. (2010) Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part I. Lithodoidea, Lomisoidea and Paguroidea. Raffles Bulletin of Zoology, 23 (Supplement), 5–107.
McLaughlin, P.A. & Pittman, C. (2002) Reinstatement and rediagnosis of Catapaguroides setosus and description of a second Hawaiian species of the genus (Decapoda: Anomura: Paguridea: Paguridae). Pacific Science, 56, 41–48.
https://doi.org/10.1353/psc.2002.0006Melin, G. (1939) Paguriden und Galatheiden von Prof. Dr. Sixten Bocks Expedition nach den Bonin-Inseln 1914. Kongliga Svenska Vetenskapsakademiens Handlinger, Series 3, 18, 1–119.
Milne-Edwards, A. & Bouvier, D.L. (1892) Observations préliminaries sur les paguriens recueillis par les expéditions du Travailleur et du Talisman. Annales des Sciences Naturelles, Zoologie et Paléontologie, Series 7, 13, 185–226.
Miyake, S. (1978) The Crustacean Anomura of Sagami Bay. Hoikusha, Tokyo, 200 pp. (English text) + 161 pp. (Japanese text), 4 pls.
Okuno, J. & Arima, H. (2006) Additional records of inshore hermit crabs (Crustacea, Decapoda, Anomura) from Izu-ohshima Island, the northern Izu Islands, Japan. Bulletin of the Biogeographical Society of Japan, 61, 29–43. [in Japanese with English abstract]
Osawa, M. & Takeda, M. (2004) Hermit crabs (Crustacea: Decapoda: Anomura: Paguroidea) from submarine caves in the Ryukyu Islands, south-western Japan. Journal of Natural History, 38, 1097–1132.
https://doi.org/10.1080/0022293031000079589Saint Laurent, M. de (1968) Révision des genres Catapaguroides et Cestopagurus et description de quatre genres nouveaux. I. Catapaguroides A. Milne- Edwards et Bouvier et Decaphyllus nov. gen. (Crustacés Décapodes Paguridae). Bulletin du Muséum National d’Histoire Naturelle, Paris, Series 2, 39, 923–954, 1100–1119. [dated 1967, published 1968]
Saint Laurent, M. de (1970) Révision des genres Catapaguroides et Cestopagurus et description de quatre genres nouveaux. V. Trichopagurus De Saint Laurent (Crustacés Décapodes Paguridae). VI. Conclusion. Bulletin du Muséum National d’Histoire Naturelle, Paris, Series 2, 42, 210–222.