There are 50 endemic species in the Arctic polar basin (zone 27)
Arcticomisophria bathylaptevensis Martinez Arbizu & Seifried, 1996 (F)(presence in 1 zones) Arctokonstantinus hardingi Markhaseva & Kosobokova, 2001 (F)(presence in 1 zones) Brodskius arcticus Andronov & Kosobokova, 2011 (F)(presence in 1 zones) Byrathis laptevorum (Markhaseva, 1998) (F)(presence in 1 zones) Caromiobenella arctica (Davis & Green, 1974) (M)(presence in 1 zones) Chiridiella sarsi Markhaseva, 1983 (F)(presence in 1 zones) Disco triangularis Markhaseva & Kobosokova, 1998 (F)(presence in 1 zones) Drepanopus bungei Sars, 1898 (F,M)(presence in 1 zones) Eurytemora bilobata Akatova, 1949 (F)(presence in 1 zones) Eurytemora brodskyi Kos, 1993 (F,M)(presence in 1 zones) Eurytemora canadensis Marsh, 1920 (F,M)(presence in 1 zones) Eurytemora foveola Johnson, 1961 (F,M)(presence in 1 zones) Eurytemora gracilis Sars, 1898 (F,M)(presence in 1 zones) Eurytemora raboti Richard, 1897 (F,M)(presence in 1 zones) Eurytemora richingsi Heron & Damkaer, 1976 (F,M)(presence in 1 zones) Eurytemora yukonensis M.S. Wilson, 1953 (F,M)(presence in 1 zones) Jaschnovia brevis (Farran, 1936) (F,M)(presence in 1 zones) Jaschnovia tolli (Linko, 1913) (F,M)(presence in 1 zones) Kirnesius groenlandicus Markhaseva & Semenova, 2005 (M)(presence in 1 zones) Lucicutia pseudopolaris Heptner, 1969 (F,M)(presence in 1 zones) Mesaiokeras spitsbergensis Schulz & Kwasniewski, 2004 (F,M)(presence in 1 zones) Microcalanus sp. A Vidal, 1971 (F,M)(presence in 1 zones) Microcalanus sp. B Vidal, 1971 (F,M)(presence in 1 zones) Mimocalanus damkaeri Brodsky, Vyshkvartzeva, Kos & Markhaseva, 1983 (F,M)(presence in 1 zones) Monstrilla bernardensis (Willey, 1920) (M)(presence in 1 zones) Monstrilla nasuta Davis & Green, 1974 (F)(presence in 1 zones) Monstrilla sp.1 [Davis & Green, 1974] (M)(presence in 1 zones) Monstrillopsis ferrarii Suarez-Morales & Ivanenko, 2004 (F)(presence in 1 zones) Monstrillopsis planifrons Delaforge, Suarez-Morales, Walkusz, Campbell & Mundy, 2017 (F)(presence in 1 zones) Neomormonilla polaris (Sars, 1900) (F)(presence in 1 zones) Onchocalanus cristogerens Markhaseva & Kobosokova, 1998 (M)(presence in 1 zones) Paraeuchaeta polaris Brodsky, 1950 (F,M)(presence in 1 zones) Pertsovius heterodentatus Andronov & Kosobokova, 2011 (F)(presence in 1 zones) Pertsovius serratus Andronov & Kosobokova, 2011 (F)(presence in 1 zones) Pertsovius tridentatus Andronov & Kosobokova, 2011 (F)(presence in 1 zones) Phaennocalanus unispinosus Markhaseva, 2002 (F)(presence in 1 zones) Pseudeuchaeta arctica Markhaseva, 1986 (F,M)(presence in 1 zones) Pseudoamallothrix paralaminata Vyshkvartzeva, 2003 (F,M)(presence in 1 zones) Pseudocalanus sp. Vidal, 1971 (F,M)(presence in 1 zones) Sarsicopia polaris Martinez Arbizu, 1997 (F,M)(presence in 1 zones) Scaphocalanus polaris Brodsky, 1950 (F)(presence in 1 zones) Scaphocalanus sp. a Vidal, 1971 (F)(presence in 1 zones) Scaphocalanus sp. b Vidal, 1971 (F)(presence in 1 zones) Senecella siberica Vyshkvartzeva, 1994 (F,M)(presence in 1 zones) Spinocalanus sp. Johnson, 1963 (M)(presence in 1 zones) Stephos arcticus Sars, 1909 (F,M)(presence in 1 zones) Xantharus siedleckii Schulz & Kwasniewski, 2004 (F)(presence in 1 zones) Xanthocalanus polarsternae Markhaseva, 1998 (F,M)(presence in 1 zones) Xanthocalanus quasiprofundus Vyshkvartzeva, 2002 (F)(presence in 1 zones) Xanthocalanus spinodenticulatus Markhaseva, 1998 (F)(presence in 1 zones)
