Clausilia costata var. subcostata Bellini, 1908a: 14 [ex Tiberi ms.]

Type locality: Ischia Island (Naples, Italy) .

Original description: “stries peu visibles” [more visible striae—with respect to an unknown clausilid, reported as Clausilia costata Ziegler].

Remarks: having been instituted on the basis of insignificant morphological characteristics, we rank it infrasubspecific, and thus not available (ICZN 2012: Art. 10.2, 45.5, 45.6, glossary). Clausilia costata var. subcostata Bellini, 1908 would also be a primary homonym of Clausilia costata subsp. subcostata Boettger, 1879 . Cochlodina costata (Pfeiffer, 1828) does not occur in southern Italy (Welter-Schultes 2012); this taxon was not figured by Bellini (1908a), and thus we are not able to understand what he actually described.