Bivalvia | ... | Unionidae | Unioninae | Unionini | Unionina | Unio crassus

Bourguignat in Locard, 1882. Prodr. Malac. Franç. 1: 285, 355.
Bourguignat in Locard, 1889. Contr. Faune Malacol. Franc. 13: 134 [28].
Bourguignat in Locard, 1893. Coqu. Eau Douce Saumâtre France: 161, fig. 175.
Bourguignat in Locard, 1899. Conchyliol. Portug.: 217.
Type(s): POSSIBLE SYNTYPE MNHN_22215, La Moselle.
+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024
+ Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1969
+ Unio crassus batavus (Maton & Rackett, 1807) — Haas, 1940
+ Unio batavus var. baraceus de Joannis — Germain, 1931
+ — Simpson, 1914
= Unio (Socardiana) feliciani Bourguignat in Locard, 1882 — Germain, 1904
= Unio (groupe de l’U. feliciani) feliciani Bourguignat in Locard, 1882 — Locard, 1899
= Unio (Groupe de l’U. feliciani) feliciani Bourguignat — Locard, 1893
+ — Westerlund, 1890
= Unio (Socardiana) feliciani Bourguignat in Locard — Locard, 1889
= Unio (Crassiana) feliciani Bourguignat — Servain, 1882
= Unio (Groupe de l’U. crassus) feliciani Bourguignat, 1879, Mss. — Locard, 1882