Dadagulella cuspidata ( Verdcourt, 1962 ) Rowson & Tattersfield, 2013

Rowson, Ben & Tattersfield, Peter, 2013, Revision of Dadagulella gen. nov., the “ Gulella radius group ” (Gastropoda: Streptaxidae) of the eastern Afrotropics, including six new species and three new subspecies, European Journal of Taxonomy 37, pp. 1-46 : 20

publication ID

https://dx.doi.org/10.5852/ejt.2013.37

publication LSID

lsid:zoobank.org:pub:ADF6394E-77B5-4309-87FE-4097FDE0A3FD

DOI

https://doi.org/10.5281/zenodo.3815775

persistent identifier

https://treatment.plazi.org/id/4511E41D-D837-FFD4-FE46-FE8BF0D2FA35

treatment provided by

Carolina

scientific name

Dadagulella cuspidata ( Verdcourt, 1962 )
status

comb. nov.

Dadagulella cuspidata ( Verdcourt, 1962) comb. nov.

Figs 31 View Figs 27-35 , 59 View Figs 51-64 , 84 View Fig ; Table 1 View Table 1

Gulella cuspidata Verdcourt, 1962: 3 , 27-28, pl. 3, fig. 2.

Gulella sp. nov. ” – Verdcourt 1958: 94, 100, fig. 10.

Gulella cuspidata – van Bruggen 1969: 71. — Verdcourt 1983: 232. — Richardson 1988: 72. — Verdcourt 1996: 136. — Tattersfield 1998 b: 37. — Tattersfield et al. 1998: 135. — van Bruggen 2000: 233. — Verdcourt 2006: 46. — Rowson & Lange 2007: 31. — Muratov 2010: 277.

Type material examined

TANZANIA: holotype MRAC.792352 : 1 ad., Worlds View, Shume , West Usambara Mts (4.70°S, 38.20°E), in rather dry evergreen forest, leg. B. & L. Verdcourt, Dec. 1956. GoogleMaps

Other material examined

None.

Description

SHELL ( Figs 31 View Figs 27-35 , 59 View Figs 51-64 ). Large (4.30 - 4.80 mm high x 1.80 x 2.50 mm wide), of 7.75 whorls. Ovate-acuminate, spire coeloconoid (spire angle 58°). Apex sharply pointed. Embryonic whorls appear smooth but with fine regular radial striae. Later whorls with relatively few, coarse ribs (about 8 per mm on penultimate whorl). Sutures of intermediate depth. Umbilicus narrowly open. Peristome incomplete parietally. Outer palatal surface of aperture with a furrow-like depression corresponding to the upper palatal tooth. Dentition 6-fold (alternatively recognisable as 5-fold), consisting of: one lamella-like parietal tooth; two palatal teeth, the upper much larger and forming a parieto-palatal sinus; one basal, in-running tooth; and a strong, squarish columellar tooth, running in to form a columellar baffle which is connected to it. Juvenile shells and anatomy unknown.

Range and habitat

Elevation not stated but probably between 1500-2000 m at the type locality in northeastern Tanzania.

Remarks

This species differs from D. minareta sp. nov. in having two palatal teeth, in having a basal tooth, in the shape of the parietal tooth, and in size.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Streptaxidae

Genus

Dadagulella

Loc

Dadagulella cuspidata ( Verdcourt, 1962 )

Rowson, Ben & Tattersfield, Peter 2013
2013
Loc

Gulella

Muratov I. V. 2010: 277
Rowson B. & Lange C. N. 2007: 31
Verdcourt B. 2006: 46
Bruggen A. C. van 2000: 233
Tattersfield P. 1998: 37
Tattersfield P. & Seddon M. B. & Meena C. & Kayumbo N. & Kasigwa P. 1998: 135
Verdcourt B. 1996: 136
Richardson C. L. 1988: 72
Verdcourt B. 1983: 232
Bruggen A. C. van 1969: 71
1969
Loc

Gulella cuspidata

Verdcourt B. 1962: 3
1962