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Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

Search the database pages:

Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Paetulunio Watters, 2018: synonymy
     1 Recent valid species (1 total species)

Micromya Agassiz, 1852
Agassiz, 1852. Arch. Naturg. 18(1): 47.
(homonym of Rondani, 1840 [Dipt.])
Type species: Unio lapillus Say, 1831 (sub. desig. by Herrmannsen, 1852: 83) = Paetulunio fabalis

Paetulunio Watters, 2018
Watters, 2018. Visaya, Suppl. (10): 13.
Type species: Unio fabalis Lea, 1831 (orig. desig.) = Paetulunio fabalis

Taxonomic History (since 1900)

MicromyaSimpson (1900), Ortmann (1909), Ortmann (1909), Ortmann (1910), Simpson (1914), Ortmann (1924), Ortmann (1925), Haas (1969)
Unio (s.s.)Call (1900)
Eurynia (Micromya)Ortmann (1912), Ortmann (1918)
Uniode Gregorio (1914)
LemioxFrierson (1927), Haas (1969)
Ligumia (Micromya)Thiele (1934)
VillosaBurch (1975), R.I. Johnson (1980), Mackie et al. (1980), Turgeon et al. (1988), Cummings & Mayer (1992), ... Jones (2015), Lane et al. (2016), Williams et al. (2017), Klymus et al. (2020), Gasparini et al. (2020)
PaetulunioWatters (2018), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025), Campbell & Lydeard (2026)

 
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