nominal species Unio elongatus ‘Pfeiffer’ of Authors

Unio elongatus ‘Pfeiffer’ of Authors = Unio elongatulus

‘Pfeiffer’ of Authors.
Lea, 1836. Synopsis Fam. Naiades: 37.
Lea, 1838. Synopsis Fam. Naiades: 24.
Lea, 1852. Synopsis Fam. Naiades: 37.
Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 491.
Haas, 1952. Nautilus 65(4): 118.
Bogan, 1993. Amer. Zool. 33: 602.
(error for Unio elongatula C. Pfeiffer, 1825)