Traits taxon details
original description
(of Ptychotrema (Parennea) cedrorum Connolly, 1922) Connolly, M. (1922). Notes on African non-marine Mollusca, with descriptions of many new species. The Annals and Magazine of Natural History, (9) 10 (59): 485-517, pl. 14. London. [31 October]., available online at https://www.biodiversitylibrary.org/page/24253383 page(s): 490, pl. 14, fig. 13. [details]
original description
(of Ptychotrema (Ennea) superadornatum Germain, 1934) Germain, L. (1934). Contributions à la faune malacologique de l'Afrique équatoriale. LXVIII. Mollusques terrestres nouveaux des régions montagneuses de l'Afrique Orientale (Mission de l'Omo, 1932-1933). I. - Streptaxidae, Ptychotrematidae et Endodontidae. <em>Bulletin de la Muséum National d'Histoire naturelle, Paris, A, (2) 6: 262–270.</em> page(s): 263 [details]
additional source
Adam, W.; Van Goethem, J. L. (1978). Revision du sous-genre Parennea Pilsbry du genre Ptychotrema Mörch (Mollusca-Pulmonata-Streptaxidae). <em>Études du Continent Africain.</em> 5: 1-79. page(s): 44. [details] Available for editors 
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