original description
Gieysztor, M. (1929). Zur Kenntnis einiger Dalyellia-, Castradella- und Castrada-Arten. <em>Bulletin International de l'Académie Polonaise des Sciences et des Lettres. Classe des Sciences Mathématiques et Naturelles.</em> Série B: Sciences Naturelles (II) (3/6): 155–195. Plates 8–10.
page(s): 174-180 [details] Available for editors 
additional source
Gieysztor, M. (1934). Uber die Dalyellia viridis-Artengruppe (Rhabdocoela). <em>Mémoires de l'Académie Polonaise des Sciences et des Lettres. Classe des Sciences Mathématiques et Naturelles.</em> Series B: Sciences Naturelles 6: 207–219.
page(s): 211, 214 [details] Available for editors 
additional source
Gieysztor, M. (1939). Übersicht der Rhabdocoelen und Alloeocoelen Polens. <em>Archives d'Hydrobiologie et d'lchtyologie.</em> 12: 1–54.
page(s): 18, 52 [details] Available for editors 
additional source
Luther, A. (1955). Die Dalyelliiden (Turbellaria Neorhabdocoela), eine Monographie. <em>Acta Zoologica Fennica.</em> 87: 1-337.
page(s): 162 [details] Available for editors 
additional source
Gieysztor, M. (1938). Systematisch-anatomische Untersuchungen an Turbellarien Polens. <em>Zoologica Poloniae.</em> 3: 215–248. With 3 plates.
page(s): 219 [details] Available for editors 
From editor or global species database
Status Was described as a "variety" by Gieysztor (1929), which was followed by Luther (1955). However, Gieysztor does not unambiguously reveal that the name sas proposed for an infrasubspecific entity. Moreover, later Gieysztor (1934; 1939) treats it as a subspecies. Hence, according to Art. 45.6.4 of ICZN, the taxon is to be treated as subspecific. [details]
Taxonomic remark The specimens of D. penicilla from Tabor mentioned by Sekera (1912) and from Warshau by Gieysztor (1926) are also this subspecies (see Sekera, 1929; Luther, 1955) [details]