Stylasterids (Hydrozoa: Stylasteridae) from Mar del Plata submarine canyon and adjacent area (southwestern Atlantic), with a key to the species off Argentina Author Bernal, M. C. Museo Argentino de Ciencias Naturales “ Bernardino Rivadavia ” - CONICET-Av. Ángel Gallardo 470, C 1405 DJR, Buenos Aires, Argentina Author Cairns, S. D. 0000-0001-7209-9271 Department of Invertebrate Zoology, Smithsonian Institution- 10 th St. & Constitution Ave. NW, Washington DC, 20560 USA cairnss @ si. edu; http: // orcid. org / 0000 - 0001 - 7209 - 9271 cairnss@si.edu Author Penchaszadeh, P. E. 0000-0002-2043-8814 Museo Argentino de Ciencias Naturales “ Bernardino Rivadavia ” - CONICET-Av. Ángel Gallardo 470, C 1405 DJR, Buenos Aires, Argentina & pablopench @ gmail. com; https: // orcid. org / 0000 - 0002 - 2043 - 8814 pablopench@gmail.com Author Lauretta, D. 0000-0001-5344-2425 Museo Argentino de Ciencias Naturales “ Bernardino Rivadavia ” - CONICET-Av. Ángel Gallardo 470, C 1405 DJR, Buenos Aires, Argentina & dlauretta @ gmail. com; http: // orcid. org / 0000 - 0001 - 5344 - 2425 dlauretta@gmail.com text Zootaxa 2021 2021-05-12 4969 3 401 452 journal article 6481 10.11646/zootaxa.4969.3.1 ea7a5aa0-0ce5-48f3-bebc-bae40df09c91 1175-5326 4751258 140804AC-7852-46F4-811D-3D86F4AA1130 Genus Conopora Moseley, 1879 Type species. Conopora tenuis Moseley, 1879 Included species. Conopora adeta Cairns ; C. alloporoides † Cairns ; C . arborescens † Nielsen ; C. beebei Cairns ; C. bifacialis Cairns ; C. cactos Cairns ; C. candelabrum Cairns ; C. cardata Cairns ; C. crassisepta Cairns ; C. croca Cairns ; C. dura Hickson & England ; C. forticula † Cairns ; C. gigantea Cairns ; C. laevis (Studer) ; C . mariae † Stolarski ; C . sola Cairns & Zibrowius ; C . tenuiramus Cairns & Zibrowius ; C . tetrastichopora Cairns ; C . unifacialis Cairns ; C . verrucosa (Studer) Distribution. Indo-West Pacific, Subantarctic and Antarctic regions, 95–2355 m (see Cairns 2015 ). New record off Mar del Plata, 1275–1398 m Diagnosis. See Cairns 2015 .