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 Protoschmidtia foraminosa f. incrustans Czerniavsky, 1880 Protoschmidtia foraminosa f. incrustans Czerniavsky, 1880: 98 Described by Czerniavsky from Sebastopol, Crimea, approximate coordinates 44.62°N 33.5°E ( syntypes ZIN-RAS 10962 and 11404). As this is the first mentioned forma it is here chosen as the nominotypical forma to be named P. foraminosa f. foraminosa . As indicated above we propose to merge the forma with the species Haliclona foraminosa ( Czerniavsky, 1880 ) . The present combination is a senior primary homonym of Protoschmidtia grimmi f. incrustans Czerniavsky, 1880: 102 . Even though this is currently assigned to the synonymy of Metschnikowia tuberculata Grimm, 1877 , the junior name must be replaced (ICZN art. 57.2). I propose Protoschmidtia czerniavskyi nom.nov. , which is a junior synonym of Metschnikowia tuberculata Grimm, 1977 .