uncertain > unassessed (I do not have, nor can find the original description. The species is also mentioned nowhere else in literature. Untill I have access to the original description, it's status will remain unassessed.)
Tyler, S., Artois, T.; Schilling, S.; Hooge, M.; Bush, L.F. (eds) (2006-2023). World List of turbellarian worms: Acoelomorpha, Catenulida, Rhabditophora. Mesostoma delmarmola Vendrix, 1963. Accessed at: https://www.marinespecies.org/turbellarians/aphia.php?p=taxdetails&id=852589 on 2024-08-04