original descriptionMichaelsen, W. (1892). Terricolen der Berliner Zoologischen Sammlung. II. <em>Archiv für Naturgeschichte.</em> 58: 209-261., available online athttps://www.biodiversitylibrary.org/page/6386659 page(s): 243 + fig 21 [details]
additional sourceBeddard, F.E. (1895). A monograph of the order of Oligochaeta. <em>[Book].</em> 769 pp. The Clarendon Press, Oxford., available online athttps://www.biodiversitylibrary.org/item/71343 page(s): 417 [details]