A new species of Maraenobiotus Mrázek, 1893 (Copepoda: Harpacticoida Canthocamptidae) from Colombian Andean mosses, with an identification key for the American species Author Gaviria, Santiago 0000-0002-5959-7919 University of Vienna, Dept. of Limnology and Bio-Oceanography & Technisches Büro für Biologie, Fred-Raymond-Gasse 19 / 2 / 4, A- 1220 Vienna, Austria. santiago. gaviria @ gmx. at; https: // orcid. org / 0000 - 0002 - 5959 - 7919 santiago.gaviria@gmx.at Author Defaye, Danielle 0000-0002-1524-6973 27 rue Gaston Charlet, F- 87000 Limoges, France. danielle. defaye @ mnhn. fr; https: // orcid. org / 0000 - 0002 - 1524 - 6973. Corresponding author. danielle.defaye@mnhn.fr text Zootaxa 2021 2021-10-12 5051 1 101 116 journal article 4013 10.11646/zootaxa.5051.1.9 b7a11f1b-6aa3-4529-b619-221de586ae52 1175-5326 5564097 FC1E4C59-C9A9-48F3-8C4A-662FA13A25A7 Identification key for American species of Maraenobiotus Females 1 Leg 2, exopod 3 with 4 setae and spines................................................................... 2 - Leg 2, exopod 3 with 5 setae and spines................................................................... 3 2 Caudal rami dorsally without sigmoid chitinous thickening; caudal setae IV and V bulbous at their base... M. fontinaloides - Caudal rami dorsally with sigmoid chitinous thickening; caudal setae IVand V straight, not bulbous at their base................................................................................................ M. brucei brucei 3 Anal operculum without spinules........................................................... M. naticochensis - Anal operculum with spinules........................................................................... 4 4 Leg 3, distal exopodal segment with six setae and spines...................................................... 5 - Leg 3, distal exopodal segment with five setae and spines..................................................... 6 5 Leg 3, second endopodal segment with five setae and spines; leg 5, baseoendopod with five elements.................. 9 - Leg 3, second endopodal segment with four setae and spines; leg 5, baseoendopod with four elements....... M. canadensis 6 Leg 4, distal exopodal segment with six setae and spines............................................. M. australis - Leg 4, distal exopodal segment with five setae and spines..................................................... 7 7 Leg 4, second endopodal segment with four setae and spines; leg 1, proximal endopodal segment reaching to 2/3 length of second exopodal segment................................................................. M. subterraneus - Leg 4, second endopodal segment with five setae and spines; leg 1, proximal endopodal segment extending to apical margin of second exopodal segment.............................................................................. 8 8 Caudal ramus 2.0–2.5 times longer than broad, dorsally with sigmoid chitinous thickening, innen margin unarmed, seta VI thick, basally leaf-like enlarged; mandibular palp 2-segmented....................................... M. husmanni - Caudal ramus 1.3 times longer than broad, dorsally without chitinous thickening, inner margin armed with four spinules inserted subapically, seta VI thin, bassally not enlarged; mandibular palp 1-segmented.................. M. wellsi sp. nov. 9 Caudal ramus conical, as long as broad; leg 1, proximal endopodal segment reaching to at least apical margin of second exopodal segment............................................................................... M. fontinalis - Caudal ramus barrel shaped, 1.7 times longer than broad; leg 1, proximal endopodal segment reaching to middle of second exopodal segment................................................................. M. insignipes insignipes