Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae)

Keywords: Indian Ocean, hydrothermal vents, Anatoma, Gastropoda, INDEX project


New species in Anatoma Woodward, 1859 (Anatomidae, Vetigastropoda) are found in abyssal hydrothermal vent field habitats on the oceanic plate margins in the Indian Ocean. Six species are identified using molecular sequence analyses of which four species are described as new based on their morphological characters: Anatoma discapex sp. nov., Anatoma declivis sp. nov., Anatoma laevapex sp. nov. and Anatoma paucisculpta sp. nov. Inadequate material was available for a morphological description of the other two species with genetic identification, but it is likely that all six species are new to science and endemic to the Indian Ocean. The northern Central Indian Ridge localities are dominated by Anatoma declivis sp. nov.; its closest relative is Anatoma discapex sp. nov. which occurs in the central area near the Rodriguez Triple Junction. Anatoma laevapex sp. nov. and Anatoma paucisculpta sp. nov. as well as a fifth undescribed species are mainly found on the Southeast Indian Ridge.


Altschul S.F., Gish W., Miller W., Myers E.W. & Lipman D.J. 1990. Basic local alignment search tool. Journal of Molecular Biology 215: 403–410. https://doi.org/10.1016/S0022-2836(05)80360-2

Chen C., Copley J.T., Linse K., Rogers A.D. & Sigwart J.D. 2015a. The heart of a dragon: 3D anatomical reconstruction of the ‘scaly-foot gastropod’ (Mollusca: Gastropoda: Neomphalina) reveals its extraordinary circulatory system. Frontiers in Zoology 12 (1): 13. https://doi.org/10.1186/s12983-015-0105-1

Chen C., Linse K., Copley J.T. & Rogers A.D. 2015b. The ‘scaly-foot gastropod’: a new genus and species of hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae) from the Indian Ocean. Journal of Molluscan Studies 81 (3): 322–334. https://doi.org/10.1093/mollus/eyv013

Chen C., Uematsu K., Linse K. & Sigwart J.D. 2017. By more ways than one: rapid convergence at hydrothermal vents shown by 3D anatomical reconstruction of Gigantopelta (Mollusca: Neomphalina). BMC Evolutionary Biology 17 (1): 1–19. https://doi.org/10.1186/s12862-017-0917-z

Chen C., Han Y., Copley J.T. & Zhou Y. 2021. A new peltospirid snail (Gastropoda: Neomphalida) adds to the unique biodiversity of Longqi vent field, Southwest Indian Ridge. Journal of Natural History 55 (13–14): 851–866. https://doi.org/10.1080/00222933.2021.1923851

Galindo L., Puillandre N., Strong E. & Bouchet P. 2014. Using microwaves to prepare gastropods for DNA Barcoding. Molecular Ecology Resources 14: 700–705. https://doi.org/10.1111/1755-0998.12231

Geiger D.L. 2006. A new blind Anatoma species from the bathyal of the northeastern Pacific (Vetigastropoda: Anatomidae). Molluscan Research 26 (2): 108–112.

Geiger D.L. 2012. Monograph of the Little Slit Shells. Volume 1. Introduction, Scissurellidae: 1–728. Volume 2. Anatomidae, Larocheidae, Depressizonidae, Sutilizonidae, Temnocinclidae: 729–1291. Santa Barbara Museum of Natural History Monographs 7, Santa Barbara.

Geiger D.L. & Thacker C. 2005. Molecular phylogeny of Vetigastropoda reveals non-monophyletic Scissurellidae, Trochoidea, and Fissurelloidea. Molluscan Research 25: 47–55.

Geller J., Meyer C., Parker M. & Hawk H. 2013. Redesign of PCR primers for mitochondrial cytochrome c oxidase subunit I for marine invertebrates and application in all-taxa biotic surveys. Molecular Ecology Resources 13: 851–861. https://doi.org/10.1111/1755-0998.12138

Gerdes K.H., Martínez Arbizu P., Schwarz-Schampera U., Schwentner M. & Kihara T.C. 2019a. Detailed mapping of hydrothermal vent fauna: a 3D reconstruction approach based on video imagery. Frontiers in Marine Science 6: 96. https://doi.org/10.3389/fmars.2019.00096

Gerdes K.H., Martínez Arbizu P., Schwentner M., Freitag R., Schwarz-Schampera U., Brandt A. & Kihara T.C. 2019b. Megabenthic assemblages at the southern Central Indian Ridge–spatial segregation of inactive hydrothermal vents from active-, periphery-and non-vent sites. Marine Environmental Research 151: 104776. https://doi.org/10.1016/j.marenvres.2019.104776

Gerdes K.H., Kihara T.C., Martínez Arbizu P., Kuhn T., Schwarz-Schampera U., Mah C.L., Norenburg J.L., Linley T.D., Shalaeva K., Macpherson E., Gordon D., Stöhr S., Messing C.G., Bober S., Guggolz T., Christodoulou M., Gebruk A., Kremenetskaia A., Kroh A., Sanamyan K., Bolstad K., Hoffman L., Gooday A.J. & Molodtsova T. 2021. Megafauna of the German exploration licence area for seafloor massive sulphides along the Central and South East Indian Ridge (Indian Ocean). Biodiversity Data Journal 9: e69955. https://doi.org/10.3897/BDJ.9.e69955

Han Y., Gonnella G., Adam N., Schippers A., Burkhardt L., Kurtz S., Schwarz-Schampera U., Franke H. & Perner M. 2018. Hydrothermal chimneys host habitat-specific microbial communities: analogues for studying the possible impact of mining seafloor massive sulfide deposits. Scientific Reports 10386. https://doi.org/10.1038/s41598-018-28613-5

Hashimoto J., Ohta S., Gamo T., Chiba H., Yamaguchi T., Tsuchida S., Okudaira T., Watabe H., Yamanaka T. & Kitazawa M. 2001. First hydrothermal vent communities from the Indian Ocean discovered. Zoological science 18 (5): 717–721. https://doi.org/10.2108/zsj.18.717

Haszprunar G., Kunze T., Warén A. & Heß M. 2017. A reconsideration of epipodial and cephalic appendages in basal gastropods: homologies, modules and evolutionary scenarios. Journal of Molluscan Studies 83 (4): 363–383. https://doi.org/10.1093/mollus/eyx032

Hoffman L., Gofas S. & Freiwald A. 2021. The genus Anatoma Woodward, 1859 (Gastropoda, Anatomidae) from Azorean seamounts collected during the R/V Meteor Cruise M151 Athena. Iberus 39 (2): 139–152. https://doi.org/10.5281/zenodo.5035715

Johnson S.B., Warén A., Tunnicliffe V., van Dover C., Wheat C.G., Schultz T.F. & Vrijenhoek R.C. 2015. Molecular taxonomy and naming of five cryptic species of Alviniconcha snails (Gastropoda: Abyssochrysoidea) from hydrothermal vents. Systematics and Biodiversity 13 (3): 278–295. https://doi.org/10.1080/14772000.2014.970673

Kano Y. 2008. Vetigastropod phylogeny and a new concept of Seguenzioidea: independent evolution of copulatory organs in the deep-sea habitats. Zoologica Scripta 37: 1–21. https://doi.org/10.1111/j.1463-6409.2007.00316.x

Katoh K., Misawa K., Kuma K. & Miyata T. 2002. MAFFT: a novel method for rapid multiple sequence alignment based on fast Fourier transform. Nucleic Acids Researh 30: 3059–3066. https://doi.org/10.1093/nar/gkf436

Kearse M., Moir R., Wilson A., Stones-Havas S., Cheung M., Sturrock S., Buxton S., Cooper A., Markowitz S., Duran C., Thierer T., Ashton B., Meintjes P. & Drummond A. 2012. Geneious Basic: an integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics 28 (12):1647–1649. https://doi.org/10.1093/bioinformatics/bts199

Kim J., Son S.K., Kim D., Pak S.J., Yu O.H., Walker S.L., Oh J., Choi S.K., Ra K., Ko Y. & Kim K.H. 2020. Discovery of active hydrothermal vent fields along the Central Indian Ridge, 8–12°S. Geochemistry, Geophysics, Geosystems 21 (8): e2020GC009058. https://doi.org/10.1029/2020GC009058

Kumar S., Stecher G., Li M., Knyaz C. & Tamura K. 2018. MEGA X: Molecular Evolutionary Genetics Analysis across computing platforms. Molecular Biology Evolution 35: 1547–1549. https://doi.org/10.1093/molbev/msy096

Li W. & Godzik A. 2006. Cd-hit: a fast program for clustering and comparing large sets of protein or nucleotide sequences. Bioinformatics 22 (13): 1658–1659. https://doi.org/10.1093/bioinformatics/btl158

Lobo Arteaga J., Costa P., Teixeira M., Ferreira M., Costa M.H. & Costa F. 2013. Enhanced primers for amplification of DNA barcodes from a broad range of marine metazoans. BMC Ecology 13: 34. https://doi.org/10.1186/1472-6785-13-34

Monaghan M.T., Wild R., Elliot M., Fujisawa T., Balke M., Inward D.J.G., Lees D.C., Ranaivosolo R., Eggleton P., Barraclough T.G. & Vogler A.P. 2009. Accelerated species inventory on Madagascar using coalescent-based models of species delineation. Systematic Biology 58 (3): 298–311. https://doi.org/10.1093/sysbio/syp027

Nakamura K., Watanabe H., Miyazaki J., Takai K., Kawagucci S., Noguchi T., Nemoto S., Watsuji T.O., Matsuzaki T., Shibuya T. & Okamura K. 2012. Discovery of new hydrothermal activity and chemo-synthetic fauna on the Central Indian Ridge at 18–20° S. PLoS ONE 7 (3): e32965. https://doi.org/10.1371/journal.pone.0032965

Okutani T., Hashimoto J. & Sasaki T. 2004. New gastropod taxa from a hydrothermal vent (Kairei Field) in the Central Indian Ocean. Venus 63: 1–11.

Pons J., Barraclough T.G., Gomez-Zurita J., Cardoso A., Duran D.P., Hazell S., Kamoun S., Sumlin W.D. & Vogler A.P. 2006. Sequence-based species delimitation for the DNA taxonomy of undescribed insects. Systematic Biology 55 (4): 595–609. https://doi.org/10.1080/10635150600852011

Puillandre N., Lambert A., Brouillet S. & Achaz G. 2012. ABGD, Automatic Barcode Gap Discovery for primary species delimitation. Molecular Ecology 21: 1864–1877. https://doi.org/10.1111/j.1365-294X.2011.05239.x

Ratnasingham S. & Hebert P.D.N. 2007. BOLD: the Barcode of Life Data System (http://www.barcodinglife.org). Molecular Ecology Notes 7: 355–364. https://doi.org/10.1111/j.1471-8286.2007.01678.x

Ratnasingham S. & Hebert P.D.N. 2013. A DNA-based registry for all animal species: the Barcode Index Number (BIN) system. PLoS ONE 8: e66213. https://doi.org/10.1371/journal.pone.0066213

Sasaki T., Geiger D.L. & Okutani T. 2010. A new species of Anatoma (Vetigastropoda: Anatomidae) from a hydrothermal vent field in Myojin Knoll Caldera, Izu-Ogasawara Arc, Japan. Veliger 51 (1): 63–75.

Suchard M.A., Lemey P., Baele G., Ayres D.L., Drummond A.J. & Rambaut A. 2018. Bayesian phylogenetic and phylodynamic data integration using BEAST 1.10. Virus Evolution 4 (1): vey016. https://doi.org/10.1093/ve/vey016

Sun J., Zhou Y., Chen C., Kwan Y.H., Sun Y., Wang X., Yang L., Zhang R., Wei T., Yang Y. & Qu L. 2020. Nearest vent, dearest friend: biodiversity of Tiancheng vent field reveals cross-ridge similarities in the Indian Ocean. Royal Society Open Science 7 (3): 200110. https://doi.org/10.1098/rsos.200110

Van Dover C.L. 2002. Trophic relationships among invertebrates at the Kairei hydrothermal vent field (Central Indian Ridge). Marine Biology 141 (4): 761–772. https://doi.org/10.1007/s00227-002-0865-y

Van Dover C.L., Humphris S.E., Fornari D., Cavanaugh C.M., Collier R., Goffredi S.K., Hashimoto J., Lilley M.D., Reysenbach A.L., Shank T.M. & Von Damm K.L. 2001. Biogeography and ecological setting of Indian Ocean hydrothermal vents. Science 294 (5543): 818–823.https://doi.org/10.1126/science.1064574

Watanabe H. & Beedessee G. 2015. Vent fauna on the Central Indian Ridge. In: Ishibachi J.-I., Okino K. & Sunamura M. (eds) Subseafloor Biosphere Linked to Hydrothermal Systems: 205–212. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54865-2_16

WoRMS Editorial Board 2020. World Register of Marine Species. Available from http://www.marinespecies.org [accessed 1 Aug. 2020].

Zhang J., Kapli P., Pavlidis P. & Stamatakis A. 2013. A general species delimitation method with applications to phylogenetic placements. Bioinformatics 29 (22): 2869–2876. https://doi.org/10.1093/bioinformatics/btt499

Zhou Y., Zhang D., Zhang R., Liu Z., Tao C., Lu B., Sun D., Xu P., Lin R., Wang J. & Wang C. 2018. Characterization of vent fauna at three hydrothermal vent fields on the Southwest Indian Ridge: implications for biogeography and interannual dynamics on ultraslow-spreading ridges. Deep Sea Research Part I: Oceanographic Research Papers 137: 1–12. https://doi.org/10.1016/j.dsr.2018.05.001

How to Cite
Hoffman, L., Kniesz, K., Martínez Arbizu, P., & Kihara, T. C. (2022). Abyssal vent field habitats along plate margins in the Central Indian Ocean yield new species in the genus Anatoma (Vetigastropoda: Anatomidae). European Journal of Taxonomy, 826(1), 135-162. https://doi.org/10.5852/ejt.2022.826.1841
Research article