original description
Ax, P. (1954). Die turbellarienfauna des küstengrundwassers am finnischen meerbusen. <em>Acta Zoologica Fennica.</em> 81: 1-54. [details] Available for editors [request]
taxonomy source
Luther, A. (1962). Die Turbellarien Ostfennoskandiens III. Neorhabdocoela 1. Dalyellioida, Typhloplanoida: Byrsophlebidae und Trigonostomidae. Fauna Fennica, 12:1-71
page(s): 50; note: Considers C. urna to be synonymous with C. lutheri. [details] Available for editors [request]
taxonomy source
Ehlers, U. (1974). Interstitielle Typhloplanoida (Turbellaria) aus dem Litoral der Nordseeinsel Sylt. <em>Mikrofauna des Meeresbodens.</em> 49: 1-102 (427-527). (look up in IMIS)
page(s): 31; note: Agrees with Luther (1962) that C. urna is a synonym of C. lutheri [details] Available for editors [request]
additional source
Ax, P. (2008). Plathelminthes aus Brackgewässern der Nordhalbkugel. Akademie der Wissenschaft und der Literatur Mainz, Franz Steiner Verlag, Stuttgart, 696 pp.
page(s): 317–319; note: Discusses the taxonomy and morphology of the copulatory organ of the species, and concludes that C. urna and C. lutheri are not to be considered as synonyms. [details]
From editor or global species database
Synonymy C. urna was considered a synonym of C. lutheri by Luther (1962), followed by Ehlers (1974). Ax (2008) discusses the species, and argues that both are to be considered separate valid species. [details]
From editor or global species database