Bivalvia | ... | Unionidae | Unioninae | Unionini | Unionina | Unio elongatulus
Drouët, 1881. J. de Conch. 29: 245.
+ Unio elongatulus C. Pfeiffer, 1825 — Marrone et al., 2019: 354.
+ Unio elongatulus pallens Rossmaessler, 1842 — Haas, 1969: 33.
+ Unio elongatulus sandrii Rossmässler, 1844 — Haas, 1940: 125.
= Unio succineus Drouët — Westerlund, 1890: 152.
= Unio succineus Drouët — Kobelt, 1886: 21, pl. 40, fig. 253.
= Unio succineus Drouët — Drouët, 1881: 245, sp. 35.