Dadagulella frontierarum, 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 : 23

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.3815761
persistent identifier	https://treatment.plazi.org/id/9D028B17-9FCB-47E8-96B1-5901B8E3EA4E
taxon LSID	lsid:zoobank.org:act:9D028B17-9FCB-47E8-96B1-5901B8E3EA4E
treatment provided by	Carolina
scientific name	Dadagulella frontierarum
status	sp. nov.

Treatment

Dadagulella frontierarum View in CoL sp. nov.

urn:lsid:zoobank.org:act:9D028B17-9FCB-47E8-96B1-5901B8E3EA4E

Figs 34 View Figs 27-35 , 61 View Figs 51-64 , 84 View Fig ; Table 1 View Table 1

Etymology

After Frontier Tanzania, the organisation which collected the specimens; given the ending ‘- arum ’ for a feminine noun in the genitive plural.

Type material examined

TANZANIA: holotype NMW. Z.2003.074.00001: 1 ad., Mtai Forest Reserve (4.87° S, 38.77° E), East Usambara Mts, Muheza District (plot 69/3), submontane forest at 970 m alt., leg. Frontier Tanzania, 8 Mar. 1997 . Paratypes NMW. Z.2003.074.00002: 2 ads, data as holotype. Paratype NMW. Z.2003.074.00003: 1 ad., data as holotype. Paratype NMW. Z.2003.074.00004: 1 ad., data as holotype but 7 Mar. 1997. Paratypes NMT: 2 ads, data as holotype.

Other material examined

None.

Description

SHELL ( Figs 34 View Figs 27-35 , 61 View Figs 51-64 ). Medium-sized (3.15 - 3.40 mm high x 1.80 - 2.05 mm wide), of 4.5 - 5.0 whorls. Ovateacuminate, spire narrowly acuminate (spire angle 68 - 77°). Apex sharply pointed. Embryonic whorls smoothly granulate. Later whorls with few, widely-spaced, coarse ribs (5 - 7 per mm on penultimate whorl). Sutures very deep. Umbilicus narrowly open. Peristome complete, almost detached. Outer palatal surface of aperture with a depression corresponding to the lower palatal teeth. Dentition 6-fold, consisting of: one complex, V-shaped and flaring parietal tooth; three palatal teeth, the lower two larger and set low down on the palatal surface, not forming a parieto-palatal sinus; one basal, in-running denticle; and one shallow but strong, in-running columellar tooth. Shells and anatomy of juveniles unknown.

Range and habitat

Submontane forest (970 m elevation) in the East Usambara Mountains, northeastern Tanzania.

Remarks

The complex dentition and detached peristome of D. frontierarum sp. nov. are unlike that of any other Dadagulella gen. nov. species. It is also characteristic for its few whorls, few ribs and sharply pointed apex. Biogeographically a close relationship with other species in and around the East Usambaras would seem likely but there is no strong resemblance.