A morphological review of the jellyfish genus Nausithoe Kölliker, 1853 (Nausithoideae, Coronatae, Scyphozoa, Cnidaria) Author Molinari, Clarissa G. Departamento de Zoologia, Instituto Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, n. 101, Cidade Universitária, São Paulo, SP, 05508 - 090, Brazil & School of Environment and Science, Gold Coast Campus, Griffith University, Southport, QLD 4222, Australia Author Collins, Allen G. National Systematics Laboratory, Office of Science and Technology, NOAA National Marine Fisheries Service, MRC- 153, Washington, DC 20013 - 7012, USA & Department of Invertebrate Zoology, Smithsonian National Museum of Natural History, MRC- 163, Washington, DC 20013 - 7012, USA Author Morandini, André C. Departamento de Zoologia, Instituto Biociências, Universidade de São Paulo, Rua do Matão, travessa 14, n. 101, Cidade Universitária, São Paulo, SP, 05508 - 090, Brazil & Centro de Biologia Marinha, Universidade de São Paulo, Rodovia Manuel Hypólito do Rego km 131.5, São Sebastião, SP, 11612 - 109, Brazil text Zootaxa 2023 2023-08-21 5336 1 1 32 http://dx.doi.org/10.11646/zootaxa.5336.1.1 journal article 10.11646/zootaxa.5336.1.1 1175-5326 98F89833-1EBB-41A6-B943-2091F2296D40 Nausithoe albatrossi ( Maas, 1897 ) Nauphanta albatrossi Maas, 1897: 83 , pl. XIV. Nausithoe albatrossi — Vanĥffen, 1902: 29. Holotype not known, possibly not extant. Material examined: None. Diagnosis: medusa—isodome bell with gastric filaments organized in 16 clusters of 5 filaments each. Description: Based on Maas (1897) , Bigelow (1928) , Mayer (1910) , and Kramp (1961) . Adult medusa 35 to 40 mm in diameter and 35 mm high; narrow and elongate lappets, with rounded ends; smooth central disc; gonads oblong; gastric filaments organized in 16 clusters of 5 filaments (4 clusters per quadrant, a total of 80 filaments). No information about the rhopalia. No information about a polyp stage. Type locality: Gulf of Panama (no information on depth). Distribution: Pacific coast of South America. Remarks: The organization of gastric filaments is not seen in any other species of the genus.