Abstract
A new species of the hermit crab genus Diogenes Dana, 1851, D. spongicola, is described and illustrated on the basis of material collected from two locations off southern India. It appears close to D. takedai Rahayu, 2012 among about 70 congeners, but easily differentiated from the latter by the spinulose anterolateral margins of the shield, the article 2 of the antennal peduncle armed only with one distal spine, the longer, spinose antennal acicle, the absence of prominent spines on the ventrolateral margin of the cheliped meri, and the different color of the cheliped palm. Specimens of the new species were all collected from cavities of a callyspongiid sponge Callyspongia diffusa (Ridley, 1884), suggesting a possible association between the hermit crab and sponge.
References
Asakura, A. & Tachikawa, H. (2010) Diogenes holthuisi, a new species of hermit crab (Decapoda, Anomura, Diogenidae) from shallow waters of the Ogasawara (Bonin) Islands, Japan. In: Fransen, C.H.J.M., De Grave, S. & Ng, P.K.L. (Eds.), Studies on Malacostraca: Lipke Bijdeley Holthuis Memorial Volume. Crustaceana. Monograph 14. Koninklijke Brill NV, Leiden, pp. 133–144.
Igawa, M. & Kato, M. (2017) A new species of hermit crab, Diogenes heteropsammicola (Crustacea, Decapoda, Anomura, Diogenidae), replaces a mutualistic sipunculan in a walking coral symbiosis. PLoS ONE, 12 (9), e0184311.
https://doi.org/10.1371/journal.pone.0184311Komai, T., Liang, J. & Yang, T. (2012) Records of four species of the shallow water hermit crab genus Diogenes (Crustacea: Decapoda: Anomura: Diogenidae) from southern China, with description of a new species. Journal of Natural History, 46, 1219–1248.
https://doi.org/10.1080/00222933.2011.654279Komai, T., Reshmi, R. & Kumar, A.B. (2013) A new species of the hermit crab genus Diogenes (Crustacea: Decapoda: Anomura: Diogenidae) from southern India. Zootaxa, 3613 (4), 380–390.
https://doi.org/10.11646/zootaxa.3613.4.5Landschoff, J. & Rahayu, D.L. (2018) A new species of the hermit crab genus Diogenes (Crustacea: Decapoda: Diogenidae) from the coast of KwaZulu-Natal, South Africa. Zootaxa, 4379 (2), 268–278.
https://doi.org/10.11646/zootaxa.4379.2.7McLaughlin, P.A., Komai, T., Lemaitre, R. & Rahayu, D.L. (2010) Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidae and families Chirostylidae and Galatheidae of the Galatheoidae) Part I—Lithodoidea, Lomisoidea and Paguroidea. Raffles Bulletin of Zoology, 23, 5–107.
Rahayu, D.L. (2012) A new species of the hermit crab genus Diogenes Dana, 1851 (Decapoda, Anomura, Diogenidae) from Lombok, Indonesia. In: Komatsu, H., Okuno, J. & Fukuoka, K. (Eds.), Studies on Eumalacostraca: a homage to Masatsune Takeda. Crustaceana. Monographs 17. Koninklijke Brill NV, Leiden and Boston, pp. 263–274.
Rahayu, D.L. (2015) New record and new species of the hermit crab genus Diogenes Dana, 1851 (Decapoda: Anomura: Diogenidae) from Singapore. Raffles Bulletin of Zoology, 31, 182–192.
Trivedi, J.N., Osawa, M. & Vachhrajani, K.D. (2015) A new species of the genus Diogenes Dana, 1851 (Crustacea: Decapoda: Anomura: Diogenidae) from Gujarat, northwestern India. Zootaxa, 4208 (2), 189–197.
https://doi.org/10.11646/zootaxa.4208.2.6Trivedi, J.N. & Vachhrajani, K.D. (2017) An annotated checklist of hermit crabs (Crustacea, Decapoda, Anomura) of Indian waters with three new records. Journal of Asia-Pacific Biodiversity, 10, 175–182.
https://doi.org/10.1016/j.japb.2017.01.001Xiao, L.-C., Wang, Y.-L. & Sha, Z.-L. (2015) A new species of the genus Diogenes (Decapoda, Anomura, Diogenidae) from the South China Sea. Crustaceana, 88, 1439–1445.
https://doi.org/10.1163/15685403-00003497