species Euglesa variabilis (Prime, 1852): synonymy

Pisidium variabile Prime, 1852

Prime, 1852. Proc. Boston Soc. Nat. Hist. 4: 163.
Prime, 1852. Boston J. Nat. Hist. 6(3): 351, pl. 11, figs. 7-9.
Prime, 1865. Smithsonian Misc. Coll. (145): 66, figs. 69-70.

Pisidium variabile — Herrington (1962), Mackie et al. (1980), Turgeon et al. (1998), Schultheiß et al. (2008), Bogan (2010), IUCN (2011), Stunžėnas et al. (2011), ITIS (2012), Clewing et al. (2013), Saito et al. (2022)
Pisidium (Cyclocalyx) variabile — Clarke (1973), Burch (1975), Cooley & Ó Foighil (2000), Mackie (2007), Bespalaya et al. (2017), Fuentealba-Jara et al. (2017)
Cyclocalyx variabile — Lee & Ó Foighil (2003)
Euglesa (Cyclocalyx) variabile — Mouthon & Forcellini (2017)
Euglesa variabile — Vinarski et al. (2020)
Euglesa (Casertiana) variabilis — Bespalaya et al. (2024)
Euglesa variabilis — Bogan et al. (2026)

Pisidium cicer Prime, 1858

Prime, 1858. Ann. Lyc. Natur. Hist. 6: 64, pl. 1, figs. 1a-c.

Pisidium variabile — Herrington (1962)
Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium mirabile Clessin, 1877

‘Whittemore’ Clessin, 1877. Conch. Cab. 9(3): 49, pl. 6, figs. 1-3.

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium variabile var. brevius Sterki, 1906

(intro'd as intra-sp. of Pisidium variabile Prime, 1852)
Sterki, 1906. Nautilus 19(10): ??.

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium variabile var. hybridum Sterki, 1906

(intro'd as intra-sp. of Pisidium variabile Prime, 1852)
Sterki, 1906. Nautilus 19(10): ??.

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium variabile var. magnum Sterki, 1916

(intro'd as intra-sp. of Pisidium variabile Prime, 1852)
Sterki, 1916. Ann. Carnegie Mus. 10(3/4): ??.

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium decisum Sterki, 1922

Sterki, 1922. Ann. Carnegie Mus. 13(3/4): ??.

Pisidium variabile — Herrington (1962)
Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium probum Sterki, 1923

Sterki, 1923. Nautilus 37(1): ??.

Pisidium variabile — Herrington (1962)
Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium sanguinichristi Taylor, 1987

Taylor, 1987. Bull. NM Bur. Mines & Min. Res. 116: 47, fig. 24.

Pisidium sanguinichristi — Turgeon et al. (1998), Bogan (2010), ITIS (2012)
Euglesa variabilis — Bogan et al. (2026)

Cyclas nitida Linsley, 1845

(misidentified reference to Cyclas nitida Mighels in Mighels & Adams, 1842)
Linsley, 1845. Amer. J. Sci. 48(2): 276.

Pisidium grande ‘Whittemore, in litt.’ Prime, 1865

(intro'd as syn of Pisidium variabile Prime, 1852)
‘Whittemore, in litt.’ Prime, 1865. Smithsonian Misc. Coll. (145): 66. [nomen nudum]
‘Whittemore, in litt.’ Prime, 1870. Amer. J. Conch. 5: 173. [nomen nudum]

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)

Pisidium palustre ‘Lewis, in litt.’ Prime, 1870

(intro'd as syn of Pisidium variabile Prime, 1852)
‘Lewis, in litt.’ Prime, 1870. Amer. J. Conch. 5: 173. [nomen nudum]

Pisidium (Cyclocalyx) variabile — Burch (1975), Mackie (2007)