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Ankerius grusocurare, a new species of Aphanodactylidae (Decapoda, Brachyura) from Iriomote Island, Ryukyu Islands, Japan

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A new species of aphanodactylid genus Ankerius Ng, Rahayu & Shih, 2016, is described from Iriomote Island, Ryukyu Islands, Japan. Ankerius grusocurare n. sp. is distinct from the only congener, A. aenigmaticus, by the shape of the lateral corner of the front (= supraorbital tooth), proportionally wider carapace, and the fewer number of the teeth along the upperflexor margin of the ambulatory meri. The present study brings the number of aphanodactylid taxa to 13 species.

Affiliations: 1: 1Tropical Biosphere Research Center, Iriomote Station, University of the Ryukyus, 870 Uehara, Taketomi, Okinawa 907-1541, Japan ; 2: 2Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima, Kagoshima 890-0065, Japan

3Corresponding author; e-mail:

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1. Ahyong S. T., Ng P. K. L., 2009. "Aphanodactylidae, a new family of thoracotreme crabs (Crustacea: Brachyura) symbiotic with polychaete worms". Zootaxa, Vol 2289: 33-47.
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5. Naruse T., Maenosono T., 2012. "A new genus and species of Aphanodactylidae Ahyong & Ng, 2009 (Decapoda, Brachyura, Pinnotheroidea) from the Ryukyu Islands, Japan". In: Komatsu H., Okuno J., Fukuoka K. (eds.), Studies on Eumalacostraca: a homage to Takeda Masatsune. Crustaceana Monographs, 17 : 225-231. [Crossref]
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7. Ng P. K. L., Naruse T., 2009. "On the identity of Pinnixa brevipes H. Milne Edwards, 1853, and a new species of Aphanodactylus Tesch, 1918 (Crustacea: Decapoda: Brachyura: Pinnotheroidea) from the Philippines". Raffles Bull. Zool., Vol 20(Suppl.): 283-290.
8. Ng P. K. L., Rahayu D. L., 2016. "On the genera Selwynia Borradaile, 1903, and Gandoa Kammerer, 2006, with descriptions of two new species from Papua New Guinea and French Polynesia (Crustacea: Decapoda: Brachyura: Aphanodactylidae)". Zootaxa, Vol 4092(3): 339-370. [Crossref]
9. Ng P. K. L., Rahayu D. L., Shih H.-S., 2016. "Ankerius aenigmaticus, a new genus and new species of aphanodactylid crab symbiotic with polychaetes from the Red Sea coast of Saudi Arabia (Crustacea: Decapoda: Brachyura: Aphanodactylidae)". Zootaxa, Vol 4179(2): 271-278. [Crossref]
10. Tesch J. J., 1918. Decapoda Brachyura II. Goneplacidae and Pinnotheridae. Siboga Exped. Monogr., 39c1: 149-295.

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