Dadagulella meredithae (van Bruggen, 2000 ) 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 : 26-27

publication ID

https://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.3815781

persistent identifier

https://treatment.plazi.org/id/4511E41D-D83D-FFDD-FE63-FBB7F6E2FD5C

treatment provided by

Carolina

scientific name

Dadagulella meredithae (van Bruggen, 2000 )
status

comb. nov.

Dadagulella meredithae (van Bruggen, 2000) View in CoL comb. nov.

Figs 37 View Figs 36-40 , 84 View Fig ; Table 1 View Table 1

Gulella meredithae van Bruggen, 2000: 226-232 View in CoL , figs 1-7.

“…an as yet unidentified species from Malawi ” – van Bruggen & Meredith 1984: 165.

Gulella meredithae View in CoL – Rowson & Lange 2007: 31.

Type material examined

MALAWI: holotype RMNH.59399 : 1 ad., Nyika National Park (approx. 10.6°S, 33.8°E), Rumphi District, Juniper Forest , approx. 2100 m alt., leg. H.M. Meredith, 16 Sep. 1983. GoogleMaps

Other material examined

None.

Description

SHELL ( Fig. 37 View Figs 36-40 ). Small (2.30 - 3.10 mm high x 1.40 - 1.60 mm wide), of 5.5 - “<6” whorls. Ovate-acuminate, although spire (spire angle 58 - 77°) less acuminate than in other Dadagulella gen. nov species. Apex rounded (in holotype) to weakly pointed. Embryonic whorls smoothly granulate. Later whorls with very fine, very numerous ribs (about 27 per mm on penultimate whorl). Sutures of intermediate depth. Umbilicus closed or nearly so. Peristome incomplete parietally. Outer palatal surface of aperture with a depression corresponding to the palatal tooth. Dentition 3-fold to 4-fold, consisting of at least: one lamella-like parietal tooth; one slab-like palatal tooth, not forming a parieto-palatal sinus; and a mammillate columellar baffle. Additional teeth limited to a shallow, weak columellar swelling. Juvenile shells with 2-fold to 3-fold dentition: one parietal tooth; one columellar tooth; and usually one basal tooth (termed labral by van Bruggen 2000). Van Bruggen (2000) showed that earlier sets of dentition are visible through the shells of some transparent juveniles, even in the preceding whorls, suggesting slow or no resorbtion. Anatomy unknown.

Range and habitat

Montane forest (above 1500 m to around 2450 m) in northern and central Malawi, and adjacent part of Zambia (Chowo Forest). Van Bruggen (2000) suspected it to range into parts of Tanzania adjoining northern Malawi.

Remarks

This species is distinctive in its small size, very fine, numerous ribs, and dentition. It differs from D. radius comb. nov. s.l. and D. browni comb. nov. s.l. in the lack of a basal tooth or denticle. The apex is rounded in the holotype but more conical in paratypes figured by van Bruggen (2000).

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Streptaxidae

Genus

Dadagulella

Loc

Dadagulella meredithae (van Bruggen, 2000 )

Rowson, Ben & Tattersfield, Peter 2013
2013
Loc

Gulella meredithae

Rowson B. & Lange C. N. 2007: 31
Bruggen & Meredith 1984: 165
2007
Loc

Gulella meredithae van Bruggen, 2000: 226-232

Bruggen A. C. van 2000: 232
2000
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