A new species of Mirocaris (Crustacea: Decapoda: Caridea: Alvinocarididae) associated with hydrothermal vents on the Central Indian Ridge, Indian Ocean


  • Tomoyuki Komai Natural History Museum and Institute, Chiba
  • Joel W. Martin Natural History Museum and Institute, Chiba
  • Krista Zala Natural History Museum of Los Angeles County
  • Shinji Tsuchida Japan Agency for Marine-Earth Science Technology (JAMSTEC)
  • Jun Hashimoto Faculty of Fisheries, Nagasaki University




Crustacea, Decapoda, Caridea, Alvinocarididae, Mirocaris, new species, Central Indian Ridge, hydrothermal vent


Mirocaris indica, a new species of the caridean family Alvinocarididae, is described based on 17 specimens from hydrothermal vent fields on the Central Indian Ridge near the Rodriguez Triple Junction. The new species closely resembles the only known representative of Mirocaris, the Atlantic species M. fortunata (Martin and Christiansen). Shared major characters include the dorsoventrally flattened, unarmed rostrum, the presence of epipods on the third maxilliped through to the fourth pereopod with corresponding setobranchs on the first to fifth pereopods, and the lack of appendices internae on the third and fourth pleopods. However, the lack of submarginal rows of short to long stiff setae on the external surfaces of the fingers of the first chela distinguishes M. indica from M. fortunata, and may reflect a difference in feeding habit between the two species. Further, M. indica may attain a larger adult size than M. fortunata does.


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Baba, K. and A.B. Williams. – 1998. New Galatheoidea (Crustacea, Decapoda, Anomura) from hydrothermal systems in the West Pacific Ocean: Bismarck Archipelago and Okinawa Trough. Zoosystema, 20: 143-156.

Guinot, D. and L.A. Hurtado. – 2003. Two new species of hydrothermal vent crabs of the genus Bythograea from the southern East Pacific Rise and from the Galapagos Rift (Crustacea Decapoda Brachyura Bythograeidae). C. R. Biol., 326: 423-439. doi:10.1016/S1631-0691(03)00126-4 PMid:12876893

Guinot, D., L.A. Hurtado and R. Vrijenhoek. – 2002. New genus and species of brachyuran crab from the southern East Pacific Rise (Crustacea Decapoda Brachyura Bythograeidae). C. R. Biol., 325: 1143-1152. doi:10.1016/S1631-0691(02)01520-2 PMid:12506727

Hashimoto, J., S. Ohta, T. Gamo, H, Chiba, T. Yamaguchi, S. Tsuchida, T. Okudaira, H. Watabe, T. Yamanaka and M. Kitazawa. 2001. – First hydrothermal vent communities from the Indiana Ocean discovered. Zool. Sci., 18: 717-721. doi:10.2108/zsj.18.717

Hayashi, K. and J. Ohtomi. 2001. – A new species of the genus Periclimenes (Decapoda: Caridea: Palaemonidae) collected from hydrothermal vent fields in Kagoshima Bay, Japan. Crust. Res., 30: 160-171.

Kikuchi, T. and J. Hashimoto. – 2000. Two new caridean shrimps of the family Alvinocarididae (Crustacea: Decapoda) from a hydrothermal vent field at the Minami-Ensei Knoll in the Mid-Okinawa Trough, Japan. Species Diversity, 5: 135-148.

Kikuchi, T. and S. Ohta. – 1995. Two caridean shrimps of the families Bresiliidae and Hippolytidae from a hydrothermal field on the Iheya Ridge, off the Ryukyu Islands, Japan. J. Crust. Biol., 15: 771-785. doi:10.2307/1548826

Komai, T. and M. Segonzac. – 2003. A review of the hydrothermal vent shrimp genus Mirocaris, redescription of M. fortunate (Martin and Christiansen), and reassessment of the taxonomic status of the family Alvinocarididae (Crustacea: Decapoda: Caridea). Cah. Biol. Mar., 44: 199-215.

Komai, T. and M. Segonzac. – 2004. A new genus and species of alvinocaridid shrimp (Crustacea: Decapoda: Caridea) from the North Fiji and Lau Basins, southwestern Pacific. J. Mar. Biol. Assoc. U.K., 84: 1179-1181. doi:10.1017/S0025315404010628h

Komai, T. and M. Segonzac. – 2005a. A revision of the genus Alvinocaris Williams and Chace (Crustacea: Decapoda: Caridea: Alvinocarididae), with descriptions of a new genus and a new species of Alvinocaris. J. Nat. Hist., 39: 1111-1175. doi:10.1080/00222930400002499

Komai, T. and M. Segonzac. – 2005b. Two new species of Nematocarcinus A. Milne-Edwards, 1881 (Crustacea: Decapoda: Caridea: Nematocarcinidae) from hydrothermal vents on the North and South East Pacific Rise. Zoosystema, 27: 243-364.

Komai, T., T.M. Shank and C.L. Van Dover. – In press. A new species of Alvinocaris (Crustacea: Decapoda: Caridea: Alvinocarididae) and new record of A. muricola from methane seeps on the Blake Ridge Diapir, Northwestern Atlantic. Zootaxa.

Martin, J.W. and J.C. Christiansen. – 1995. A new species of the shrimp genus Chorocaris Martin and Hessler, 1990 (Crustacea, Decapoda, Bresiliidae) from hydrothermal vent fields along the Mid-Atlantic Ridge. Proc. Biol. Soc. Wash., 108: 220-227.

Martin, J.W. and T.A. Haney. – In press. Decapod crustaceans from hydrothermal vents and cold seeps: a review through 2004. Zool. J. Lin. Soc. London.

Martin, J.W. and T.M. Shank. – 2005. A new species of the shrimp genus Chorocaris (Decapoda: Caridea: Alvinocarididae) from hydrothermal vents in the eastern Pacific Ocean. Proc. Biol. Soc. Wash., 118: 183-198. doi:10.2988/0006-324X(2005)118[183:ANSOTS]2.0.CO;2

Shank, T.M. and J.W. Martin. – 2003. A new caridean shrimp of the family Alvinocarididae from thermal vents at Menez Gwen on the Mid-Atlantic Ridge. Proc. Biol. Soc. Wash., 116: 158-167.

Shank, T.M., M.B. Black, K.M. Halanych, R.A. Lutz and R.C. Vrijenhoek. – 1999. Miocene radiation of deep-sea hydrothermal vent shrimp (Caridea: Bresiliidae): Evidence from mitochondrial cytochrome oxidase subunit I. Mol. Phyl. Evol., 13: 244-254. doi:10.1006/mpev.1999.0642 PMid:10603254

Takeda, M., J. Hashimoto and S. Ohta. – 2000. A new species of the family Bythograeidae (Crustacea, Decapoda, Brachyura) from the hydrothermal vents along volcanic front of the Philippine Sea Plates. Bull. Natn. Sci. Mus., Tokyo, Ser. A, 26: 159-172.

Tsuchida, S. and J. Hashimoto. – 2002. A new species of bythograeid crab, Austinograea rodriguezensis (Decapoda: Brachyura), associated with active hydrothermal vents from the Indian Ocean. J. Crust. Biol., 22: 642-650. doi:10.1651/0278-0372(2002)022[0642:ANSOBC]2.0.CO;2

Van Dover, C. L., S.E. Humphris, D. Fornari, C.M. Cavanaugh, R. Collier, S.K. Goffredi, J. Hashimoto, M.D. Lilley, A.L. Reysenbach, T.M. Shank, K.L. Von Damm, A. Banta, R.M. Gallant, D. Gotz, D. Green, J. Hall, T.L. Harmer, L.A. Hurtado, P. Johnson, Z.P. McKiness, C. Meredith, E. Olson, I.L. Pan, M. Turnipseed and Y. Won. – 2001. Biogeography and ecological setting of Indian Ocean hydrothermal vents. Science, 294: 818–823. doi:10.1126/science.1064574 PMid:11557843

Vereshchaka, A.L. – 1997. A new family for a deep-sea caridean shrimp from North Atlantic hydrothermal vents. J. Mar. Biol. Ass. U. K., 77: 425-438.

Watabe, H. and J. Hashimoto. – 2002. A new species of the genus Rimicaris (Alvinocarididae: Caridea: Decapoda) from the active hydrothermal vent field, “Kairei Field,” on the Central Indian Ridge, the Indian Ocean. Zool. Sci., 19: 1167-1174. doi:10.2108/zsj.19.1167 PMid:12426479

Webber, W.R. – 2004. A new species of Alvinocaris (Crustacea: Decapoda: Alvinocarididae) and new records of alvinocaridids from hydrothermal vents north of New Zealand. Zootaxa, 444: 1-26.

Williams, A.B. – 1988. New marine decapod crustaceans from waters influenced by hydrothermal, discharge, brine and hydrocarbon seepage. Fish. Bull., 86: 263-287.




How to Cite

Komai T, Martin JW, Zala K, Tsuchida S, Hashimoto J. A new species of Mirocaris (Crustacea: Decapoda: Caridea: Alvinocarididae) associated with hydrothermal vents on the Central Indian Ridge, Indian Ocean. Sci. mar. [Internet]. 2006Mar.30 [cited 2024Apr.20];70(1):109-1. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/188