(ofPhasis (Trachycystis) Pilsbry, 1893)Pilsbry, H. A. (1892-1893). <i>Manual of conchology, structural and systematic, with illustrations of the species</i>. Ser. 2, Pulmonata. Vol. 8: Helicidae, vol. 6. pp 1-314, pls 1-58. Philadelphia, published by the Conchological Section, Academy of Natural Sciences. [pp. 1-48, pls 1-15, 25 July 1892; pp. 49-112, pls 16-27, 16 Nov 1892; pp. 113-160, pls 28-41, 25 Feb 1893; pp. 161-314, pls 42-58, 1 July 1893]. , available online athttps://biodiversitylibrary.org/page/23736486 page(s): 136 [details]
original description(ofPella Albers, 1860)Albers, J. C. & Martens, E. von. (1860). <i>Die Heliceen nach natürlicher Verwandtschaft systematisch geordnet von Joh. Christ. Albers</i>. Ed. 2. Pp. i-xviii, 1-359. Leipzig: Engelman [original manuscript of Albers edited and published by Martens]., available online athttps://www.biodiversitylibrary.org/page/11648540 page(s): 84 [details]
original description(ofPhasis (Trachycystis) Pilsbry, 1893)Pilsbry, H. A. (1892-1893). <i>Manual of conchology, structural and systematic, with illustrations of the species</i>. Ser. 2, Pulmonata. Vol. 8: Helicidae, vol. 6. pp 1-314, pls 1-58. Philadelphia, published by the Conchological Section, Academy of Natural Sciences. [pp. 1-48, pls 1-15, 25 July 1892; pp. 49-112, pls 16-27, 16 Nov 1892; pp. 113-160, pls 28-41, 25 Feb 1893; pp. 161-314, pls 42-58, 1 July 1893]. , available online athttps://biodiversitylibrary.org/page/23736486 page(s): 136 [details]