original description
An der Lan, H. (1939). Zur rhabdocoelen Turbellarienfauna des Ochrida-Sees (Balkan). <em>Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften Wien. Mathematisch-Naturwissenschaftliche Klasse.</em> 148: 195–254. [details] Available for editors
From editor or global species database
Validity Based on phylogenomic analyses Brand et al. 2022 show i) that the type species of Promacrostomum falls into Macrostomum, and ii) that the presence of a second female genital opening has evolved multiple times in Macrostomum. Based on this Promacrostomum is a synonym of Macrostomum.
[details]