Correcting sponge names: nomenclatural update of lower taxa level Porifera Author Van Soest, Rob W. M. text Zootaxa 2024 2024-01-09 5398 1 1 122 http://dx.doi.org/10.11646/zootaxa.5398.1.1 journal article 10.11646/zootaxa.5398.1.1 1175-5334 10494167 E233F731-D5FA-4032-B3A4-CEFE5A809C49 Stelletta validissima f. validissima Thiele, 1898 Stelletta validissima f. validissima Thiele, 1898: 13 , pl. I fig. 5, pl. 7 fig. 1; Koltun 1966: 44 , textfig. 19, pl. VI). Koltun erected this forma for Thiele’s S. validissima described from Yogashima, Japan , approximate coordinates 35.13°N 139.61°E , no depth provided ( holotype ZMB 7009). His own material originated from the Japanese Sea near Hokkaido . In view of the inconvincing differences of the specimens of both formas provided by Koltun and the unavailable name, they are proposed above to be merged in a single species Stelletta validissima Thiele, 1898 .