Costulodonta trilamellaris ( Melvill & Ponsonby, 1908 ) 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 : 34-35

publication ID

https://doi.org/10.5852/ejt.2020.629

publication LSID

lsid:zoobank.org:pub:ECEBD539-6E3E-45BE-A0CB-264DF3270CC0

DOI

http://doi.org/10.5281/zenodo.3804760

persistent identifier

http://treatment.plazi.org/id/03C78785-462D-FFE0-4161-409932ABFD84

treatment provided by

Valdenar

scientific name

Costulodonta trilamellaris ( Melvill & Ponsonby, 1908 )
status

gen. et comb. nov.

Costulodonta trilamellaris ( Melvill & Ponsonby, 1908)   gen. et comb. nov.

Figs 11 View Fig , 12 View Fig E–G, 18Q–R

Afrodonta trilamellaris Melvill & Ponsonby, 1908: 134   , pl. 7, figs 7, 7a, 7b.

Endodonta   [ Endodonta (Afrodonta)   ] trilamellaris   – Burnup 1912: 336.

Endodonta (Afrodonta) trilamellaris   – Connolly 1912: 128.

Afrodonta trilamellaris   – Connolly 1933: text-fig. 1(2); 1939: 252, text-fig. 19(2). — Solem 1970: 357. — Herbert & Kilburn 2004: 250, 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 2–4 intermediary axial threads; spiral sculpture of close-set, spiral threads, strongest below suture, indistinct elsewhere; parietal region with a low, narrow, in-running ridge; baso-columellar region with a broad, low, in-running ridge; palatal region with a strong, broad, ridge-like denticle just below mid-whorl; umbilicus relatively wide. Shell buff to pale ochre; diameter up to 1.5 mm.

Material examined

Lectotype (by inference, Connolly 1912: 129)

SOUTH AFRICA • KwaZulu-Natal, Dargle; H.C. Burnup leg.; NHMUK 1908.12.14.42 .

 

Paralectotypes

SOUTH AFRICA • 2 specimens; same collection data as for lectotype; NHMUK 1937.12.30.2793 to 2794   4 specimens; same collection data as for lectotype; NMSA 2175/T624   3 specimens; same collection data as for lectotype; NMSA 2181/T624   .

Other material

SOUTH AFRICA • 4 specimens; same collection data as for lectotype; ex Albany Museum; NMSA V3552 View Materials   4 specimens; same collection data as for lectotype; ex Transvaal Museum; NMSA W462 View Materials   .

Distribution and conservation

A narrow-range endemic ( Fig. 11 View Fig ), known only from the Dargle area, KwaZulu-Natal, at ± 1150 m a.s.l.; presumably in leaf-litter of southern mistbelt forest. Forested habitats in nature reserves in the Bulwer-Dargle-Karkloof area need to be surveyed in the hope of finding extant colonies of this species in formally protected areas.

Remarks

Despite the KwaZulu-Natal Midlands being a relatively well-sampled area, the original samples collected by Henry Burnup remain the only ones known of this species.

NMSA

South Africa, Kwa-Zulu Natal, Pietermaritzburg, Natal Museum

NMSA

KwaZulu-Natal Museum

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Charopidae

Genus

Costulodonta

Loc

Costulodonta trilamellaris ( Melvill & Ponsonby, 1908 )

Herbert, David G. 2020
2020
Loc

Afrodonta trilamellaris

Herbert D. & Kilburn D. 2004: 250
Solem A. 1970: 357
1970
Loc

Endodonta

Burnup H. C. 1912: 336
1912
Loc

Endodonta (Afrodonta) trilamellaris

Connolly M. 1912: 128
1912
Loc

Afrodonta trilamellaris

Melvill J. C. & Ponsonby J. H. 1908: 134
1908