Gulella (Paucidentina) bicarinata Blume, 1965 was described from a damaged, immature shell. New topotypic material from Kilimanjaro, Tanzania includes adults which are here described with the aid of micro-CT scans of the unusual shell. The shell and anatomy of adults show similarities with the little-known central Kenyan taxon Mirellia Thiele, whose sole species Ennea prodigiosa E. A. Smith, 1903 is also scanned and dissected. Most workers have treated Mirellia either as a subgenus of Gulella L. Pfeiffer, or as a subgenus of Ptychotrema L. Pfeiffer. These alternatives are discussed and both species are assigned to Mirellia, which is here treated as a genus in its own right.

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Journal of Conchology
Staff publications

Rowson, B., de Gier, W., & de Winter, T. (2019). A species comes of age: new material and micro-CT scanning reveal the adult of Gulella bicarinata Blume from Kilimanjaro, Tanzania; with a discussion of Mirellia Thiele from Kenya (Pulmonata: Streptaxidae). Journal of Conchology, 43(3), 287–296.