The genus-group Hystricella R. T. Lowe, 1855 is revised on the basis of conchological, anatomical and genetic characteristics. A new genus Wollastonia
gen. n., two recent species, W.
jessicae
sp. n. and W.
klausgrohi
sp. n., and one recent subspecies, W.
jessicae
monticola
ssp. n. are described as new to science, as well as five fossil taxa, H.
microcarinata
sp. n., W.
beckmanni
sp. n., W.
falknerorum
sp. n., W.
ripkeni
sp. n., and W.
inexpectata
sp. n. For Helix
vermetiformis R. T. Lowe, 1855, H.
leacockiana Wollaston, 1878, H.
oxytropis R. T. Lowe, 1831, H.
duplicata R. T. Lowe, 1831 and H.
oxytropis
var.
ß
subcarinulata Wollaston, 1878 lectotypes are designated. For the taxa Helix
bicarinata G. B. Sowerby I, 1824, Helix
bicarinata
var.
ß
aucta Wollaston, 1878 and Discula
bulverii W. Wood, 1828 neotypes are selected. The taxa aucta and subcarinulata are elevated to specific rank. For the hitherto monospecific (sub-) genus Callina R. T. Lowe, 1855 it is shown that it is not closely related to the genus Discula but to the Hystricella-group and its generic rank is confirmed. The taxon D.
bulverii W. Wood, 1828 is transferred from the genus Discula s. str. to the genus Callina. A further fossil taxon C.
waldeni
sp. n. is described as new to science.
