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 Pellina semitubulosa var. pontica f. horhippiana Czerniavsky, 1880 Pellina semitubulosa var. pontica f. horhippiana Czerniavsky, 1880: 111 (no illustration). The forma was described by Czerniavsky from Novorossijsk, Russian Black Sea coast, approximate coordinates 44.68°N 37.82°E , depth 2–10 m (‘holotype’ ZIN-RAS 11428). The combination is invalid on account of having four names (ICZN art. 45.5). Pellina semitubulosa ( Lamarck, 1814: 455 , as Spongia ) is recognized as an ill-known Mediterranean species, currently named Halichondria (Halichondria) semitubulosa (cf. Erpenbeck & Van Soest 2002: 804 ). The specimen of the present forma is to be assigned to that species.