Census of Cnidaria (Medusozoa) and Ctenophora from South American marine waters OLIVEIRA, OTTO M. P. MIRANDA, THAÍS P. ARAUJO, ENILMA M. AYÓN, PATRICIA CEDEÑO-POSSO, CRISTINA M. CEPEDA-MERCADO, AMANCAY A. CÓRDOVA, PABLO CUNHA, AMANDA F. GENZANO, GABRIEL N. HADDAD, MARIA ANGÉLICA MIANZAN, HERMES W. MIGOTTO, ALVARO E. MIRANDA, LUCÍLIA S. MORANDINI, ANDRÉ C. NAGATA, RENATO M. NASCIMENTO, KARINE B. JÚNIOR, MIODELI NOGUEIRA PALMA, SERGIO QUIÑONES, JAVIER RODRIGUEZ, CAROLINA S. SCARABINO, FABRIZIO SCHIARITI, AGUSTÍN STAMPAR, SÉRGIO N. TRONOLONE, VALQUÍRIA B. MARQUES, ANTONIO C. Zootaxa 2016 2016-11-18 4194 1 1 256 9RXF Stepanjants, 1979 Stepanjants 1979 [151,642,188,213] Hydrozoa Lafoeidae Acryptolaria Animalia Leptothecata 80 81 Cnidaria species operculata  Remarks: the name  Acryptolaria patagonicaEl Beshbeeshy, 1991is a nomen nudumbecause it was first proposed in an unpublished dissertation (El Beshbeeshy 1991, 2011). Recently, this name was made available by El Beshbeeshy (2011) (see article 50.1 of ICZN 1999). However,  A. patagonicahave been synonymyzed to  Acryptolaria operculataStepanjants, 1979by Peña Cantero et al.(2007), and therefore, this is the valid name of the species. Distribution in SouthAmerica: polyp—Atlantic Ocean, Argentina, from 38°S to 43°S (Stepanjants 1979; El Beshbeeshy 1991, 2011; Blanco 1994a; Blanco et al.1994; Genzano 1994b; Genzano & Zamponi 1997). Habitat: polyp—from 98 to 980mdepth (Stepanjants 1979; El Beshbeeshy 1991, 2011; Blanco 1994a; Blanco et al.1994).