Drymaeus nystianus var. nigricans Cousin, 1887

Drymaeus nystianus var. nigricans Cousin, 1887 ; Synonym: Thaumastus nystianus var. nigricans (Cousin, 1887) ; Current name: Drymaeus (Drymaeus) nystianus (L. Pfeiffer, 1853) (MolluscaBase eds. (2020). MolluscaBase. Drymaeus (Drymaeus) nystianus (L. Pfeiffer, 1853). Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1367977 on 2021-01-08). Syntype. There are different colour "varieties" of Drymaeus nystianus in different plastic bags of the same batch under the same registration number MT2365. This "subsample" is here referred as BE-RBINS-INV SYNTYPE MT 2365 Drymaeus nystianus var. nigricans Cousin, 1887. General : 1° étiquette: Thaumastus nystianus (Pfeiffer, 1853) Ecuador, Chemin de Pomasqui à Chilguiltina, ex. Cousin (Dautzenberg coll.). ORIGINAL description: Cousin A (1887) Faune malacologique de la république de l’Équateur. Bulletin de la Société Zoologique de France 12: 187–287.