WoRMS taxon details
original description
(of Gulella (Silvigulella) Pilsbry, 1919) Pilsbry, H. A. (1919). A review of the land mollusks of the Belgian Congo chiefly based on the collections of the American Museum Congo Expedition, 1909-1915. <em>Bulletin of the American Museum of Natural History.</em> 40: 1-370, pls I-XXIII. page(s): 228 [details]
additional source
Verdcourt, B. (1985). New taxa of Gulella L. Pfr. and Ptychotrema Mörch (Mollusca, Streptaxidae) from Eastern Africa. <em>Journal of Conchology 32: 109–121.</em> page(s): 110 [details] Available for editors [request]
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