Reinhardt Møbjerg Kristensen (born 1948) is a Denmark, Danish invertebrate biologist, noted for the discovery of three new phylum, phyla of microscopic animals: the Loricifera in 1983, the Symbion, Cycliophora in 1995, and the Limnognathia, Micrognathozoa in 2000. He is also considered one of the world's leading experts on Tardigrada, tardigrades. His recent field of work revolves mostly around arctic biology. He is also known for documenting ''Dendrogramma'', an invertebrate genus that was later classified as Siphonophorae of the family Rhodaliidae.

Loricifera

Kristensen collected the first members of the Loricifera phylum in Roscoff, France, in 1970, but did not describe it until 1983.Heiner, I. 2005. Preliminary account of the loriciferan fauna of the Faroe Bank (NE Atlantic). Biofar Proceedings 2005: 213–219.

Cycliophora

Kristensen and Peter Funch described ''Symbion pandora'', on the mouth-parts of Norwegian lobsters, in 1995; other species were later found on other types of lobsters.

Micrognathozoa

Kristensen described ''Limnognathia maerski'', the first (and so far only) known species in the group, in a cold spring on Disko Island in 2000.

Selected publications

* ; 2009: ''Urnaloricus gadi'' nov. gen. et nov. sp. (Loricifera, Urnaloricidae nov. fam.), an aberrant Loricifera with a viviparous pedogenetic life cycle. ''Journal of morphology'', 270(2): 129-153. * and , 2001. A New Tanarctid Arthrotardigrade with Buoyant Bodies. ''Zoologischer Anzeiger'', vol. 240, issue 3-4: 425-439. * , 1982. New Aberrant Eutardigrades from Homothermic Springs on Disko Island, West Greenland. ''Proceedings of the Third International Symposium on the Tardigrada'', August 3–6, 1980, Johnson City, Tennessee, USA: 203-220. * and , 1984. A New Family of Arthrotardigrada (Tardigrada: Heterotardigrada) from the Atlantic Coast of Florida, U.S.A. ''Transactions of the American Microscopical Society'', vol. 103, no. 3: 295-311
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Danish zoologists 1948 births Place of birth missing (living people) Living people {{Denmark-scientist-stub