Abstract
Manaxius paullus, a new species of axiid burrowing shrimp, is described on the basis of a female holotype from the Society Islands, French Polynesia, and a female paratype from the Ryukyu Islands, Japan. Both specimens were collected on shallow coral reefs. The new species is morphologically closest to five of 17 congeners, viz., M. euophthalmus (de Man, 1905), M. izuensis (Komai, 2011), M. mimasensis (Sakai, 1967), M. poupini (Komai, 2016) and M. supia Poore, 2020, but can be separated from all of them by the rostrum being relatively broad and with one pair of lateral spines, in addition to a pair of supraocular spines; the presence of a subdistal spine on the dorsal margin of the cheliped ischium; the presence of additional three or four small spines on each cheliped palm, adjacent to the dorsal margin; and the lack of a spine near the base of the fingers of each cheliped palm.
References
Clark, P.F., Galil, B. & Poore, G.C.B. (2007) A new species of Calaxius Sakai & de Saint Laurent, 1989, from West Africa (Crustacea, Decapoda, Axiidae) and synonymy of Manaxius Kensley, 2003. Proceedings of the Biological Society of Washington, 120, 63–73.
https://doi.org/10.2988/0006-324X(2007)120[63:ANSOCS]2.0.CO;2
Coelho, P. A. (1973) Descrição preliminar de Calastacus angulatus, n. sp., e de C. spinosus, n. sp., do Norte do Brasil (Crust., Decapoda, Axiidae). Ciência e Cultura, 25 (6) (Supplement), 344–345.
Felder, D.L. & Kensley, B. (2004) A new species of axiid shrimp from chemosynthetic communities of the Louisiana continental slope, Gulf of Mexico (Crustacea: Decapoda: Thalassinidea). Proceedings of the Biological Society of Washington, 117, 68–75.
Huxley, T.H. (1879) On the classification and the distribution of the crayfishes. Proceedings of the Zoological Society of London, 1878, 752–788.
Kensley, B. (2003) Axioid shrimps from Guam (Crustacea, Decapoda, Thalassinidea). Micronesica, 35–36, 359–384.
Kensley, B. & Hickman, C.P. Jr. (2001) A new species of Calaxius Sakai & de Saint Laurent, 1989, from the Galapagos Islands (Crustacea: Decapoda: Axiidae). Proceedings of the Biological Society of Washington, 114, 484–488.
Komai, T. (2011) Deep-sea shrimps and lobsters (Crustacea: Decapoda: Dendrobranchiata and Pleocyemata) from the Sagami Sea and Izu Islands, central Japan. Memoirs of the National Museum of Nature and Science, Tokyo, 47, 279–337.
Komai, T. (2016) Reappraisal of the two axiid genera Manaxius Kensley, 2003 and Calaxidium Sakai, 2014, and description of a new species of Calaxius Sakai & de Saint Laurent, 1989 from French Polynesia, Southwest Pacific (Crustacea: Decapoda: Axiidea). Zootaxa, 4098 (3), 498–510.
Komai, T., Ohtsuka, S., Nakaguchi, K. & Go, A. (2002) Decapod crustaceans collected from the southern part of the Sea of Japan in 2000–2001 using TRV Toyoshio-maru. Natural History Research, 7, 19–73.
Man, J.G. de (1905) Diagnoses of new species of macrurous decapod Crustacea from the “Siboga-Expedition”. Tijdschrift der Nederlandsche Dierkundige Vereeniging, 9, 587–614.
Man, J.G. de (1925a) The Decapoda of the Siboga-Expedition. Part VI. The Axiidae collected by the Siboga-Expedition. Siboga Expéditie Monographie, 39a5, 1–127.
Man, J.G. de (1925b) Axiopsis (Eiconaxius) sibogae n. sp. Zoologische Mededelingen, Leiden, 8, 218–219.
Man, J.G., de. (1925c) Ueber neue oder wenig bekannte Axiidae. Mitteilungen aus dem Zoologischen Museum in Berlin, 12, 117–140.
Ngoc-Ho, N. (2005) Thalassinidea (Crustacea, Decapoda) from French Polynesia. Zoosystema, 27, 47–83.
Poore, G.C.B. (2020) Axiid and micheleid lobsters from Indo-West Pacific deep-sea environments (Crustacea: Decapoda: Axiidea: Axiidae, Micheleidae). In: Corbari, L., Ahyong, S.T. & Chan, T.-Y. (Eds.), Deep-Sea Crustaceans from Papua New Guinea. Tropical Deep-Sea Benthos 31. Mémoires du Muséum national d’Histoire naturelle, Paris, 213, pp. 261–365.
Poore, G.C.B. & Collins, D.J. (2009) Australian Axiidae (Crustacea: Decapoda: Axiidae). Memoirs of Museum Victoria, 66, 221–287.
https://doi.org/10.24199/j.mmv.2009.66.20
Rathbun, M.J. (1901) The Brachyura and Macrura of Porto Rico. Bulletin of the U.S. Fish Commission, 20, 1–137.
Rathbun, M.J. (1906) The Brachyura and Macrura of the Hawaiian Islands. Bulletin of the United States Fisheries Commission, 23, 827–930, pls. 1–24.
Sakai, K. (1967) Three new species of Thalassinidea (Decapoda, Crustacea) from Japan. Researches on Crustacea, 3, 39–51.
https://doi.org/10.18353/rcustacea.3.0_39
Sakai, K. (2011) Axioidea of the world and a reconsideration of the Callianassoidea (Decapoda, Thalassinidea, Callianassida). Crustaceana Monographs, 13, 1–616.
https://doi.org/10.1163/9789047424185
Sakai, K. (2014) A review of Ambiaxiopsis altimanus Komai, 2011 and Calaxius izuensis Komai, 2011, with a new genus, Calaxidium gen. nov. (Decapoda, Pleocyemata, Callianassidea). Crustaceana, 87, 886–889.
https://doi.org/10.1163/15685403-00003313
Sakai, K. (2015) Two new species, Colemanaxius andamanensis sp. nov. and Bruceaxius thailandensis sp. nov. from the Andaman Sea, Thailand (Infraorder Axiidea de Saint Laurent, 1979). Crustaceana, 88 (7/8), 867–880.
https://doi.org/10.1163/15685403-00003440
Sakai, K. & Saint Laurent, M. de (1989) A check list of Axiidae (Decapoda, Crustacea, Thalassinidea, Anomula), with remarks and in addition descriptions of one new subfamily, eleven new genera and two new species. Naturalists, Publications of Tokushima Biological Laboratory, Shikoku University, 3, 1–104.
Williams, A.B. (1974) Two new axiids (Crustacea: Decapoda: Thalassinidea: Calocaris) from North Carolina and the Straits of Florida. Proceedings of the Biological Society of Washington, 87, 451–464.