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Milnesium is a genus of tardigrades. It is rather common, being found in a wide variety of habitats across the world. It has a fossil record extending back to the Cretaceous, the oldest species found so far is known from Turonian stage deposits on the east coast of the United States.
Arthrotardigrada are an order of tardigrades, first described by Marcus in 1927. It consists of the following families:
The Stygarctidae are a family of tardigrades. The family was first described by Schulz in 1951. The genus Neoarctus was first placed in the family Stygarctidae, but it was moved to a separate family, Neoarctidae, in 1998.
The Halechiniscidae are a family of tardigrades. The family was named and first described by Gustav Thulin in 1928.
Renaudarctus is a genus of tardigrades in the family Renaudarctidae. The genus was first described by Reinhardt Kristensen and Robert P. Higgins in 1984, and named after biologist Jeanne Renaud-Mornant.
Renaudarctidae are a family of tardigrades. It was first described in 1984 by Reinhardt Kristensen and Robert P. Higgins, and named after biologist Jeanne Renaud-Mornant.
Neoarctus primigenius is a species of tardigrades. It is the only species in the genus Neoarctus, which is the only genus in the family Neoarctidae. The genus and species were first described and named by Grimaldi de Zio, D'Addabbo Gallo and Morone De Lucia in 1992. The authors first placed the genus in the family Stygarctidae, but it was moved to a separate family in 1998.
Neostygarctus is a genus of tardigrades. It is the only genus in the family Neostygarctidae. It was named and described by Grimaldi de Zio, D'Addabbo Gallo and Morone De Lucia in 1982.
Faeroestygarctus dezioae is a species of armoured marine tardigrades. It is the only species of Faroestygarctus, a genus of the family Stygarctidae.
Halechiniscus is a genus of tardigrades in the family Halechiniscidae. It was named and described by Ferdinand Richters in 1908.
Parastygarctus is a genus of tardigrades, in the family Stygarctidae. It was first described and named by Jeanne Renaud-Debyser in 1965.
Pseudoastygarctus is a genus of tardigrades in the family Stygarctidae. The genus was first described and named by McKirdy, Schmidt & McGinty-Bayly in 1976.
Clavarctus falculus is a species of tardigrades. It is the only species in the genus Clavarctus, part of the family Halechiniscidae. The species has been found in deep sea in the Mozambique Channel.
Proclavarctus fragilis is a species of tardigrades. It is the only species in the genus Proclavarctus, part of the family Halechiniscidae. The species has been found in deep sea in the Mozambique Channel and the Bay of Biscay.
Exoclavarctus is a genus of tardigrades in the family Halechiniscidae. Its only species is Exoclavarctus dineti. The species has been found in the deep sea in the Bay of Biscay.
Paradoxipus orzeliscoides is a species of tardigrade. It is the only species in the genus Paradoxipus, part of the family Halechiniscidae and the subfamily Orzeliscinae. The species has been found in the coastal waters of the southeastern United States, in the western part of the Atlantic Ocean. The genus and the species were named and described by Reinhardt Kristensen and Robert P. Higgins in 1989.
Raiarctus is a genus of tardigrades in the family Styraconyxidae. The genus was named and first described by Jeanne Renaud-Mornant in 1981.
Victoriopisa cusatensis is a amphipod species in the family Eriopisidae. The species name ‘cusatensis’ refers to the Cochin University of Science and Technology (CUSAT). This species has been described by the team of researchers in 2018 from the Valanthakad mangrove area of Vembanad backwater.
Indosphenia kayalum is a small bivalve species inhabiting fragmented brackish-water habitats around Kochi backwater, Kerala. The specific name kayalum is derived from kayal, the Malayalam name for these backwaters. This species was described in 2018 from the Ezhupunna region of Cochin Backwater, Vembanad Lake along with other myid clam Mytilopsis and brackish water gastropod Nassodonta insignis. This is the fifth species described in the genus Indosphenia. The other species recognized under this genus are Indosphenia cochinensis, Indosphenia abbreviata, Indosphenia abbreviata chilkaensis and Indosphenia sowerbyi.
Stygarctus keralensis is a newly described species of marine Tardigrade. It is described from the intertidal area of Vadakara beach, Kerala it can be easily differentiated from closely related species S. gourbaultae. This species was described by groups of researchers namely N.K. Vishnudattan, S. Bijoy Nandan and P.R. Jayachandran of Cochin University of Science and Technology, Kerala, India and J.G. Hansen of University of Copenhagen, Denmark. This species has been named after "Kerala State" situated in the south west coast of India where this species live. The present discovery is an outcome of an ongoing Ministry of Earth Sciences-National Centre for Earth Science Studies study on the ecology and diversity of submarine groundwater habitats of Kerala led by Sivasankaran Bijoy Nandan.
References
- ↑ Fujimoto, Shinta (27 March 2014). "A new Stygarctus (Arthrotardigrada: Stygarctidae) from Japan, with entangled seminal receptacle ducts". Zootaxa. 3784 (2): 187–95. doi:10.11646/zootaxa.3784.2.8. PMID 24872047.
- ↑ Degma, Peter; Bertolani, Roberto; Guidetti, Roberto (30 June 2018). Actual checklist of Tardigrada species (2009-2018) (PDF). 34th Ed. University of Modena and Reggio Emilia . Retrieved 26 November 2018.
- ↑ VISHNUDATTAN, N. K.; NANDAN, S Bijoy; HANSEN, J. G.; JAYACHANDRAN, P. R. "A new Tardigrade species, Stygarctus keralensis sp. nov.(Arthrotardigrada: Stygarctidae) from the intertidal zone of Southwest coast of India". Zootaxa. 4985 (3): 381–91.
