Costulodonta burnupi ( Connolly, 1933 ) 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 : 31-32

publication ID	https://doi.org/ 10.5852/ejt.2020.629
publication LSID	lsid:zoobank.org:pub:ECEBD539-6E3E-45BE-A0CB-264DF3270CC0
DOI	https://doi.org/10.5281/zenodo.3804709
persistent identifier	https://treatment.plazi.org/id/03C78785-4612-FFDD-41BC-45D7328BFA29
treatment provided by	Valdenar
scientific name	Costulodonta burnupi ( Connolly, 1933 )
status	gen. et comb. nov.

Treatment

Costulodonta burnupi ( Connolly, 1933) View in CoL gen. et comb. nov.

Figs 10 View Fig I–K, 11, 18M–N

Afrodonta burnupi Connolly, 1933: 148 , text-fig. 1(7), pl. 7, figs 9–11.

Afrodonta burnupi – Connolly 1939: 252, text-fig. 19(7). — Solem 1970: 352, fig. 1e. — Herbert & Kilburn 2004: 249, text-fig.

Diagnosis

Shell very small, spire slightly raised; protoconch with close-set axial riblets (diameter ±415 μm); teleoconch sculpture of compound axial riblets with 1–3 intermediary axial threads; spiral sculpture of indistinct microscopic threads, often scarcely evident; parietal region with two in-running lamellae (the upper one weaker and more deep-set); baso-columellar region with a deep-set, rounded, in-running ridge (sometimes missing, fide Connolly); palatal region lacking dentition; umbilicus of moderate width. Shell pale corneous brown; diameter up to 1.5 mm.

Material examined

Holotype

SOUTH AFRICA • KwaZulu-Natal, Weenen, Mkolombe Mtn [uMkholombe]; 28.90° S, 30.14° E; Mar. 1926; H.P. Thomasset leg.; NHMUK 1931.6.4.4. GoogleMaps

Paratypes

SOUTH AFRICA – KwaZulu-Natal • 2 specimens; Weenen, Tugela Estate; H.P. Thomasset leg.; Mar. 1926; NHMUK 1937.12.30.2728 to 2729 . These specimens are not conspecific with the holotype and are also paratypes of Afrodonta connollyi Solem, 1970 .

Other material

SOUTH AFRICA – KwaZulu-Natal • 3specimens; Weenen, Mkolombe Mtn; Mar. 1926; H.P. Thomasset and G.J. Goodwin leg.; H.C. Burnup collection; NMSA A9187 About NMSA .

Distribution and conservation

A narrow-range endemic ( Fig. 11 View Fig ), known only from the environs of Weenen, KwaZulu-Natal; no accurate altitude or habitat data available. Wooded habitats in Weenen Nature Reserve need to be surveyed in the hope of finding extant colonies of this species in a formally protected area.

Remarks

May be confused with Afrodonta connollyi , which sometimes has a baso-columellar ridge, but in that species the parietal lamellae are stronger, the protoconch is smooth, the teleoconch silky, the umbilicus narrower, and both parietal lamellae extend to or slightly beyond the aperture edge.

The original samples from uMkholombe Mtn collected by H.P. Thomasset remain the only ones known. The specimens from Tugela Estates (28.74° S, 30.17° E) mentioned by Connolly (1933) were subsequently described as Afrodonta connollyi by Solem (1970).