Revision of Dadagulella gen. nov., the “ Gulella radius group ” (Gastropoda: Streptaxidae) of the eastern Afrotropics, including six new species and three new subspecies Author Rowson, Ben 05D46259-DA45-45A4-9127-5AF361D566A7 Biodiversity & Systematic Biology, National Museum of Wales, Cathays Park, Cardiff, UK CF 10 3 NP. Email: ben. rowson @ museumwales. ac. uk & urn: lsid: zoobank. org: author: 05 D 46259 - DA 45 - 45 A 4 - 9127 - 5 AF 361 D 566 A 7 Author Tattersfield, Peter 8C55642E-B18A-461B-9BF9-31CB6DB7A070 Biodiversity & Systematic Biology, National Museum of Wales, Cathays Park, Cardiff, UK CF 10 3 NP. Email: ben. rowson @ museumwales. ac. uk & urn: lsid: zoobank. org: author: 8 C 55642 E-B 18 A- 461 B- 9 BF 9 - 31 CB 6 DB 7 A 070 text European Journal of Taxonomy 2013 2013-02-04 37 1 46 journal article http://dx.doi.org/10.5852/ejt.2013.37 9682b45b-5e22-4965-a293-e203660e0ed3 2118-9773 3806770 ADF6394E-77B5-4309-87FE-4097FDE0A3FD Dadagulella frontierarum sp. nov. urn:lsid:zoobank.org:act: 9D028 B 17-9FCB-47 E 8-96 B 1-5901 B 8 E 3 EA 4 E Figs 34 , 61 , 84 ; 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 , 61 ). 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.