World Register of Marine Species (WoRMS)
Dalyellia penicilla diminuta Gieysztor, 1929
Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2026). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Dalyellia penicilla diminuta Gieysztor, 1929. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=484852 on 2026-08-29
Gieysztor, M. (1929). Zur Kenntnis einiger Dalyellia-, Castradella- und Castrada-Arten. Bulletin International de l'Académie Polonaise des Sciences et des Lettres. Classe des Sciences Mathématiques et Naturelles. Série B: Sciences Naturelles (II) (3/6): 155–195. Plates 8–10.