A new tardigrade species of the genus Neostygarctus Grimaldi de Zio et al., 1982 (Tardigrada, Arthrotardigrada) from the Great Meteor Seamount, Northeast Atlantic

Authors

  • Alexei V. Tchesunov Department of Invertebrate Zoology, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, 119991

DOI:

https://doi.org/10.5852/ejt.2018.479

Keywords:

Arthrotardigrada, marine Tardigrada, Neostygarctus, seamounts, taxonomy

Abstract

A new species of Neostygarctus Grimaldi de Zio et al., 1982 is described from the Great Meteor Seamount summit plateau in the Northeast Atlantic. Neostygarctus grossmeteori sp. nov. is characterized by the number and position of dorsomedian spines (five spines on the cephalic plate and each body plate and on the caudal plate, the spines decreasing in length backwards); the presence of eyes and of one or two pairs of ventral cervical spines; a transversal row of two to five short but strong spikes on the ventral side of the lateral body processes; only the internal claws of each leg provided with a normal accessory spine. The new species is related to N. acanthophorus Grimaldi de Zio et al., 1982 but differs by details of the dorsal body spines and the sculptures, the presence of ventral neck spines and ventral spikes on lateral body projections. Neostygarctus grossmeteori sp. nov. differs from two other known species of Neostygarctus, N. oceanopolis Kristensen et al., 2015 (Condor Seamont, NE Atlantic) and N. lovedeluxe Fujimoto & Miyazaki, 2013 (submarine cave NW Pacific), even more obviously by the number and position of dorsal body spines.

References

Bartels P.J., Apodaca J.J., Mora C. & Nelson D.R. 2016. A global biodiversity estimate of a poorly known taxon: Phylum Tardigrada. Zoological Journal of the Linnean Society 178 (4): 730–736. https://doi.org/10.1111/zoj.12441

Bello G. & Grimaldi de Zio S. 1998. Phylogeny of the genera of the Stygarctidae and related families (Tardigrada: Heterotardigrada). Zoologischer Anzeiger 237 (2): 171–183.

Degma P., Bertolani R. & Guidetti R. 2017. Actual checklist of Tardigrada species. Available from http://www.tardigrada.modena.unimo.it/miscellanea/Actual%20checklist%20of%20Tardigrada.pdf, [accessed 8 Apr. 2017].

Fontoura P., Bartels P.J., Jørgensen A., Kristensen R.M. & Hansen J.G. 2017. A dichotomous key to the genera of the marine heterotardigrades (Tardigrada). Zootaxa 4294 (1): 1–45. https://doi.org/10.11646/zootaxa.4294.1.1

Fujimoto S. & Miyazaki K. 2013. Neostygarctus lovedeluxe n. sp. from the Miyako Islands, Japan: the first record of Neostygarctidae (Heterotardigrada: Arthrotardigrada) from the Pacific. Zoologial Science 30: 414–419. https://doi.org/10.2108/zsj.30.414

Fujimoto S., Jørgensen A. & Hansen J.G. 2017. A molecular approach to arthrotardigrade phylogeny (Heterotardigrada, Tardigrada). Zoologica Scripta 46 (4): 496–505. https://doi.org/10.1111/zsc.12221

Gad G. 2002. The relation between habitus and habitat structure as evidenced by a new species of Glochinema (Nematoda, Epsilonematidae) from the plateau of the Great Meteor Seamount. Hydrobiologia 474: 171–182. https://doi.org/10.1023/A:1016531720833

Gad G. 2004a. The Loricifera fauna of the plateau of the Great Meteor Seamount. Archive of Fishery and Marine Research 51 (1–3): 9–29.

Gad G. 2004b. Diversity and assumed origin of the Epsilonematidae (Nematoda) of the plateau of the Great Meteor Seamount. Archive of Fishery and Marine Research 51 (1–3): 30–42.

Gad G. 2009. Colonisation and specialisation on seamounts, evidence from Draconematidae (Nematoda) of the Great Meteor Seamount. Marine Biodiversity 39: 57–69. https://doi.org/10.1007/s12526-009-0007-6

Gallo M., D’Addabbo R., De Leonardis C., Sandulli R. & Grimaldi de Zio S. 2007. The diversity of Indian Ocean Heterotardigrada. In: Pilato G. & Rebecchi L. (eds) Proceedings of the Tenth International Symposium on Tardigrada, Journal of Limnology 66 (suppl.): 60–64. https://doi.org/10.4081/jlimnol.2007.s1.60

George K.H. 2006. New Ancorabolinae Sars, 1909 (Copepoda, Harpacticoida, Ancorabolidae) of the Atlantic Ocean. Description of Pseudechinopsyllus sindemarkae gen. et sp. nov. and Dorsiceratus ursulae sp. nov. from the Great Meteor Seamount, and redescription of D. octocornis Drzycimski, 1967, and D. triarticulatus Coull, 1973 (part.). Meiofauna Marina 15: 123–156.

George K.H. 2013. Faunistic research on metazoan meiofauna from seamounts – a review. Meiofauna Marina 20: 1–32.

George K.H. & Schminke H.K. 2002. Harpacticoida (Crustacea, Copepoda) of the Great Meteor Seamount, with first conclusions as to the origin of the plateau fauna. Marine Biology 141: 887–895. https://doi.org/10.1007/s00227-002-0878-6

Giere O. 2009. Meiobenthology: the microscopic motile fauna of aquatic sediments. 2nd edition. Springer-Verlag, Berlin / Heidelberg.

Grimaldi de Zio S. & D’Addabbo Gallo M. 2001. Further data on the Mediterranean Sea tardigrade fauna. Zoologischer Anzeiger 240: 345–360. https://doi.org/10.1078/0044-5231-00042

Grimaldi de Zio S., D’Addabbo Gallo M. & Morone de Lucia M.R. 1982. Neostygarctus acanthophorus, n. gen., n. sp., nuovo Tardigrado marino del Mediterraneo. Cahiers de Biologie Marine 23: 319–323.

Grimaldi de Zio S., D’Addabbo Gallo M. & Morone de Lucia M.R. 1987. Adaptive radiation and phylogenesis in marine Tardigrada and the establishment of Neostygarctidae, a new family of Heterotardigrada. Bollettino di Zoologia 54: 27–33.

Grimaldi de Zio S., D’Addabbo Gallo M., Morone de Lucia M.R. & Troccoli A. 1990. New description of Neostygarctus acanthophorus (Tardigrada, Arthrotardigrada). Cahiers de Biologie Marine 31: 409–416.

Hansen J.G. 2005. The ongoing investigation of the Faroe Bank tardigrade fauna. Frøᵭskapparit supplementum. Proceedings from the BIOFAR Symposium, Tórshavn, Faroe Islands, 24–26 April 2003, North-East Atlantic marine benthic organisms in the Faroes – taxonomy, distribution and ecology: 220–223.

Hansen J.G., D’Addabbo Gallo M.G. & Grimaldi de Zio S. 2003. A comparison of morphological characters within the genus Rhomboarctus (Tardigrada: Heterotardigrada) with description of two new species. Zoologischer Anzeiger 242: 83–96. https://doi.org/10.1078/0044-5231-00089

Hansen J.G., Jørgensen A. & Kristensen R.M. 2001. Preliminary studies of the tardigrade fauna of the Faroe Bank. Zoologischer Anzeiger 240: 385–393. https://doi.org/10.1078/0044-5231-00046

Hansen J.G., Kristensen R.M. & Jørgensen A. 2012. The armoured marine tardigrades (Arthrotardigrada, Tardigrada). Scientia Danica. Series B, Biologica 2: 8–91.

Jørgensen A. & Kristensen R.M. 2001. A new tanarctid arthrotardigrade with buoyant bodies. Zoologischer Anzeiger 240: 425–439. https://doi.org/10.1078/0044-5231-00051

Kristensen R.M. & Higgins R.P. 1984. A new family of Arthrotardigrada (Tardigrada: Heterotardigrada) from the Atlantic Coast of Florida, U.S.A. Transactions of the American Microscopical Society 103 (3): 295–311. https://doi.org/10.2307/3226191

Kristensen R.M., Sørensen M.V., Hansen J.G., Zeppilli D. 2015. A new species of Neostygarctus (Arthrotardigrada) from the Condor Seamount in the Azores, Northeast Atlantic. Marine Biodiversity 45 (3): 453-467. https://doi.org/10.1007/s12526-015-0323-y

Mohn C. 2010. Spotlight 5: Great Meteor Seamount. Oceanography 23 (1): 106–107. https://doi.org/10.5670/oceanog.2010.77

Renaud-Mornant J. 1988. Tardigrada. In: Higgins R.P. & Thiel H. (eds) Introduction to the Study of Meiofauna: 357–361. Smithsonian Institution Press, Washigton, DC.

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Published

2018-11-27

How to Cite

Tchesunov, A. V. (2018). A new tardigrade species of the genus Neostygarctus Grimaldi de Zio et al., 1982 (Tardigrada, Arthrotardigrada) from the Great Meteor Seamount, Northeast Atlantic. European Journal of Taxonomy, (479). https://doi.org/10.5852/ejt.2018.479

Issue

No. 479 (2018): A new tardigrade species of the genus Neostygarctus Grimaldi de Zio et al., 1982 (Tardigrada, Arthrotardigrada) from the Great Meteor Seamount, Northeast Atlantic

Section

Zoology

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