Costulodonta, Herbert, 2020

Herbert, David G., 2020, Revision of the aperturally dentate Charopidae (Gastropoda: Stylommatophora) of southern Africa - genus Afrodonta s. lat., with description of five new genera, twelve new species and one new subspecies, European Journal of Taxonomy 629, pp. 1-55 : 28

Key to species of Costulodonta gen. nov.

1 Parietal dentition absent ............................................................................... C. bidens gen. et sp. nov. – Parietal dentition present ................................................................................................................... 2

2 Parietal region with a single low, in-running ridge ....................... C. trilamellaris gen. et comb. nov. – Parietal region with two lamellae or one lamella plus an in-running row of denticles ..................... 3

3 Palatal region lacking dentition; baso-columellar region with a single, low denticle ......................... .............................................................................................................. C. burnupi gen. et comb. nov.

– Palatal region dentate; baso-columellar denticle also present .......................................................... 4

4 Palatal region with 3–4 denticles; upper parietal tooth an in-running lamella .................................... ................................................................................................................. C. pluridens gen. et sp. nov.

– Palatal region with two broad, deep-set in-running ridges; upper parietal comprising an in-running row of two or more denticles .............................................................. C. acinaces gen. et comb. nov.