MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Fri 13 February 2026
Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Lampsilini | Medionidus acutissimus
nominal species Unio acutissimus Lea, 1831
Unio acutissimus Lea, 1831 = Medionidus acutissimus
Lea, 1831. Trans. Amer. Phil. Soc. 4 [O. 1]: 89 [99], pl. 10, fig. 18.
Type(s): IDIOTYPE MCZ_178887, Alabama River.
Taxonomic Opinions
= Medionidus acutissimus (Lea, 1831) — FMCS, 2025: [4].
= Medionidus acutissimus (Lea, 1831) — Hopper et al., 2023.
= Medionidus acutissimus — Hauck et al., 2023: fig. 7.
= Medionidus acutissimus (Lea, 1831) — Graf & Cummings, 2021: 18.
= Medionidus acutissimus (Lea, 1831) — FMCS, 2021: [4].
= Medionidus acutissimus — Burlakova et al., 2019: 349.
= Medionidus acutissimus (Lea, 1831) — Williams et al., 2017: 41.
= Medionidus acutissimus (Lea, 1831) — Williams et al., 2014: 267, text fig..
= Medionidus acutissimus (I. Lea, 1831) — ITIS, 2012: [web].
= Medionidus acutissimus — Haag, 2012: 72.
= Medionidus acutissimus (Lea, 1831) — Williams et al., 2011: 6.
= Medionidus acutissimus Lea, 1831 — Bogan, 2010: [20].
= Medionidus acutissimus — Cummings & Graf, 2010: 377.
= Medionidus acutissimus (Lea, 1831) — Williams et al., 2008: 434.
= Medionidus acutissimus (Lea, 1831) — Graf & Cummings, 2007: 306.
= Medionidus acutissimus (Lea, 1831) — Zanatta & Murphy, 2006: 197.
= Medionidus acutissimus (I. Lea) — Jones et al., 2005: 90, Appendix 1.
= Medionidus accutissimus [sic] (Lea, 1831) — Campbell et al., 2005: 154.
= Medionidus acutissimus (Lea) — Lydeard et al., 1999: 128.
= Medionidus acutissimus (Lea, 1831) — Parmalee & Bogan, 1998: 155, pl. 66.
= Medionidus acutissimus (Lea, 1831) — Turgeon et al., 1998: 35.
= Medionidus acutissimus I. Lea, 1831 — IUCN, 1996: [web].
= Medionidus acutissimus (I. Lea) — Williams et al., 1993: 13.
= Medionidus acutissimus (Lea, 1831) — Turgeon et al., 1988: 31.
= Medionidus acutissimus (Lea, 1831) — R.I. Johnson, 1977: 170, pl. 18, figs. 3-8.
= Medionidus acutissimus (Lea, 1831) — Burch, 1975: 20.
= Medionidus acutissimus (Lea, 1831) — Haas, 1969: 412.
= Medionidus acutissimus (Lea, 1831) — Frierson, 1927: 92, sp. 419.
= Medionidus acutissimus (Lea, 1831) — Simpson, 1914: 251.
= Medionidus acutissimus (Lea, 1831) — Simpson, 1900: 590.
= Unio (sec. Diplodon) acutissimus Lea, 1831 — Paetel, 1890: 143.
= Unio acutissimus Lea — B.H. Wright, 1888: [1].
= Margaron (Unio) acutissimus (Lea) — Lea, 1870: 32.
= Unio acutissimus Lea, 1831 — Sowerby, 1866: pl. 36, sp. 189.
= Unio (Diplodon) acutissimus Lea — Adams & Adams, 1857: 497.
= Unio acutissimus Lea, 1834 — Conrad, 1853: 244.
= Margaron (Unio) acutissimus (Lea) — Lea, 1852: 21.
= Unio acutissimus Lea — Hanley, 1843: 177, pl. 22, fig. 35.
= Unio acutissimus Lea, 1831 — Conrad, 1838: 86, pl. 47, fig. 2.
= Margarita (Unio) acutissimus Lea — Lea, 1838: 14.
= Margarita (Unio) acutissimus (Lea, 1831) — Lea, 1836: 14.
= Unio acutissimus Lea — Ferussac, 1835: 28.
