Pupilla bigranata

Pupilla pratensis
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora;
Superfamily:	Pupilloidea
Family:	Pupillidae
Genus:	Pupilla
Binomial name
	Pupilla bigranata; (Rossmässler, 1839)[1]
Synonyms
	Pupa bigranata Rossmässler, 1839

Pupilla bigranata is a nomen dubium that was used for some forms of the land snails Pupilla triplicata and Pupilla muscorum (Pupillidae), but none of these forms represent a separate species, therefore such species as Pupilla bigranata does not exist.[2]

Considering that in the original Rossmässler's description the type locality was not indicated and that type specimens are not preserved, it is not possible to determine whether Pupa bigranata Rossmässler, 1839 is synonym of Pupilla triplicata or Pupilla muscorum.

References

Rossmässler E. A. (1838-1844). Iconographie der Land- und Süßwassermollusken, mit vorzüglicher Berücksichtigung der europäischen noch nicht abgebildeten Arten. (1)2(Heft 7/8): [1-4], 1-44, (Heft 9/10): [1-4], 1-66, (Heft 11): [1-4], 1-15, (Heft 12): [1-4], 1-37, Taf. 31-60. Dresden, Leipzig. (Arnold).
Balashov I., Neiber M., Bogon K., Hausdorf B. 2019. On the identity of "Pupilla bigranata" populations from Germany and Ukraine (Gastropoda: Pupillidae). Archiv für Molluskenkunde. 148 (1): 1—7.

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[1] Rossmässler E. A. (1838-1844). Iconographie der Land- und Süßwassermollusken, mit vorzüglicher Berücksichtigung der europäischen noch nicht abgebildeten Arten. (1)2(Heft 7/8): [1-4], 1-44, (Heft 9/10): [1-4], 1-66, (Heft 11): [1-4], 1-15, (Heft 12): [1-4], 1-37, Taf. 31-60. Dresden, Leipzig. (Arnold).

[2] Balashov I., Neiber M., Bogon K., Hausdorf B. 2019. On the identity of "Pupilla bigranata" populations from Germany and Ukraine (Gastropoda: Pupillidae). Archiv für Molluskenkunde. 148 (1): 1—7.