A new genus and species of axiid shrimp (Crustacea, Decapoda) from a southwestern Indian Ocean seamount

Peter C. Dworschak

Abstract


A new genus and species of axiid shrimp, Montanaxius mediumquod gen. et sp. nov., is described and illustrated based on three specimens collected from hexactinellid sponges from a seamount in the southwest Indian Ocean. The new genus is characterized by a laterally denticulate rostrum, short lateral carina, absence of submedian carina, a prominent toothed median carina, round pleomere pleura 2–5, pleurobranchs on second to fourth pereopods, and the presence of a male first pleopod and appendix interna on pleopods 3–5. It most closely resembles Levantocaris Galil & Clark, 1993 and Planaxius Komai & Tachikawa, 2008, but differs from the former by being gonochoristic, having a strongly elevated gastric region and well-developed eyes, and from the latter by its toothed median carina and the presence of a median telson spine.

Keywords


Montanaxius mediumquod gen. et sp. nov.; Axiidae; seamount; sponge associate

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DOI: https://doi.org/10.5852/ejt.2016.229

References


Coleman C.O. 2003. “Digital inking”: how to make perfect line drawings on computers. Organisms Diversity & Evolution 3: 303–304. http://dx.doi.org/10.1078/1439-6092-00081

Coleman C.O. 2009. Drawing setae the digital way. Zoosystematics and Evolution 85 (2): 305–310. http://dx.doi.org/10.1002/zoos.200900008

Haug C., Mayer G., Kutschera V., Waloszek D., Maas A. & Haug J.T. 2011. Imaging and documenting gammarideans. International Journal of Zoology article ID 380829: 1–9. http://dx.doi.org/10.1155/2011/380829

IUCN 2013. Seamounts Project. An Ecosystem Approach to Management of Seamounts in the Southern Indian Ocean. International Union for Conservation of Nature and Natural Resources, Gland, Switzerland. Available from http://www.undp.org/content/dam/undp/library/Environment%20and%20Energy/Water%20and%20Ocean%20Governance/Seamounts_Project.pdf [accessed 19 Feb. 2016]

Kensley B. 1989. New genera in the thalassinidean families Calocarididae and Axiidae (Crustacea, Decapoda). Proceedings of the Biological Society of Washington 102 (4): 960–967. Available from http://biodiversitylibrary.org/page/34551350 [accessed 9 Feb. 2016]

Komai T. 2013. A new species of the hippolytid genus Paralebbeus Bruce & Chace, 1986 (Crustacea: Decapoda: Caridea) from the Coral Seamount, southwestern Indian Ocean. Zootaxa 3646 (2): 171–179. http://dx.doi.org/10.11646/zootaxa.3646.2.5

Komai T. & Tachikawa H. 2008. Thalassinidean shrimps (Crustacea: Decapoda) from the Ogasawara Islands, Japan. Natural History Research 10 (1): 19–52. Available from http://www.chiba-muse.or.jp/NATURAL/publication/nhr_10-1_4komai.pdf [accessed 19 Feb. 2016]

Komai T., De Grave S. & Saito T. 2016. Two new species of the stenopodidean shrimp genus Spongio-caris Bruce & Baba, 1973 (Crustacea: Decapoda: Spongicolidae) from the Indo-West Pacific. Zootaxa 4111 (4): 421–447. http://dx.doi.org/10.11646/zootaxa.4111.4.5

Poore G.C.B. 1994. A phylogeny of the families of Thalassinidea (Crustacea: Decapoda) with keys to families and genera. Memoirs of the Museum of Victoria 54: 79–120. Available from http://biodiversitylibrary.org/page/39767522 [accessed 9 Feb. 2016]

Poore G.C.B. 1997. A review of the thalassinidean families Callianideidae Kossmann, Micheleidae Sakai, and Thomassiniidae de Saint Laurent (Crustacea, Decapoda) with descriptions of fifteen new species. Zoosystema 19 (2-3): 345–420.

Poore G.C.B. & Collins D.J. 2009. Australian Axiidae (Crustacea: Decapoda: Axiidea). Memoirs of Museum Victoria 66 (2): 221–287. Available from http://museumvictoria.com.au/pages/13541/b221-287_MMV66_PooreCollins_F.pdf [accessed 19 Feb. 2016]

Rogers A.D. & Taylor M.L. 2012. Benthic biodiversity of seamounts in the southwest Indian Ocean. Cruise report – R/V James Cook 066. Southwest Indian Ocean Seamounts expedition – November 7th – December 21st, 2011, 235 pp. Available from http://iwlearn.net/iw-projects/1462/reports/cruise-reports/asclme-benthic-biodiversity-of-seamounts-in-the-southwest-indian-ocean-cruise-report-1/at_download/file [accessed 3 Aug. 2015]

Sakai K. 2011. Axioidea of the World and a reconsideration of the Callianassoidea (Decapoda, Thalassinidea, Callianassida). Crustaceana Monographs 13: 1–616.

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.

Stone G.S. 2012. Mountains in the Sea. National Geographic 2012 (September): 67–77. Available from http://ngm.nationalgeographic.com/2012/09/seamounts/stone-text [Accessed 19 Feb. 2016]


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