(of)Deshayes, G. P. (1863). Catalogue des mollusques de l'île de la Réunion (Bourbon). Pp. 1-144. In Maillard, L. (Ed.) Notes sur l'Ile de la Réunion. Dentu, Paris. , available online athttps://www.biodiversitylibrary.org/page/13068117 page(s): 23, pl. 3, figs 22-24. [details]
MolluscaBase eds. (2025). MolluscaBase. Gregariella difficilis (Deshayes, 1863). Accessed through: Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2025) African Register of Marine Species at: https://www.marinespecies.org/afremas/aphia.php?p=taxdetails&id=506031 on 2026-08-19
Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2026). African Register of Marine Species. Gregariella difficilis (Deshayes, 1863). Accessed at: https://www.marinespecies.org/afremas/aphia.php?p=taxdetails&id=506031 on 2026-08-19
original description(of)Deshayes, G. P. (1863). Catalogue des mollusques de l'île de la Réunion (Bourbon). Pp. 1-144. In Maillard, L. (Ed.) Notes sur l'Ile de la Réunion. Dentu, Paris. , available online athttps://www.biodiversitylibrary.org/page/13068117 page(s): 23, pl. 3, figs 22-24. [details]
basis of recordHuber, M. (2010). <i>Compendium of bivalves. A full-color guide to 3,300 of the world's marine bivalves. A status on Bivalvia after 250 years of research</i>. Hackenheim: ConchBooks. 901 pp., 1 CD-ROM. (look up in IMIS) [details]
Present Inaccurate Introduced: alien Containing type locality