December 2020
 Lasmigona subviridis (Unionidae, North America)
The December 2020 Mussel of the Month is Lasmigona subviridis. Lasmigona is a genus of eight species from eastern North America.
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November 2020
 Atlanticoncha ochracea (Unionidae, North America)
The November 2020 Mussel of the Month is Atlanticoncha ochracea. Atlanticoncha is a monotypic genus on the Atlantic Slope of North America.
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October 2020
 Bineurus mouhotii (Unionidae, East Asia)
The October 2020 Mussel of the Month is Bineurus mouhotii. Bineurus is a genus of two species from southeast Asia.
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September 2020
 Diplodon paranensis (Hyriidae, South America)
The September 2020 Mussel of the Month is Diplodon paranensis. Diplodon is a genus of 43 species from South America.
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August 2020
 Popenaias berezai (Unionidae, Central America)
The August 2020 Mussel of the Month is Popenaias berezai. Popenaias is a genus of four or five species from Central America, with a single species extending north to the USA.
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July 2020
 Trapezoideus foliaceus (Unionidae, East Asia)
The July 2020 Mussel of the Month is Trapezoideus foliaceus. Trapezoideus is a genus of 2 species found in Myanmar and western Thailand.
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June 2020
 Beringiana beringiana (Unionidae, East Asia & North America)
The June 2020 Mussel of the Month is Beringiana beringiana. Beringiana is a genus of four species that occurs from eastern Russia to western Canada and USA.
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May 2020
 Leoparreysia bhamoensis (Unionidae, East Asia)
The May 2020 Mussel of the Month is Leoparreysia bhamoensis. Leoparreysia is a genus of a dozen species from Myanmar.
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April 2020
 Pisidium amnicum (Sphaeriidae, Widespread)
The April 2020 Mussel of the Month is Pisidium amnicum. Pisidium is a globally distributed freshwater bivalve genus of more than 50 valid species.
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March 2020
 Indonaia caerulea (Unionidae, East Asia)
The March 2020 Mussel of the Month is Indonaia caerulea. Indonaia is a genus of 14 species found from India east to Thailand.
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February 2020
 Monodacna colorata (Cardiidae, North Eurasia)
The February 2020 Mussel of the Month is Monodacna colorata. Monodacna (Family Cardiidae) is not actually a mussel taxon. It is a genus of mostly brackish-water species found in the Caspian and Black Seas with only one or two species living in freshwater.
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January 2020
 Utterbackiana suborbiculata (Unionidae, North America)
The January 2020 Mussel of the Month is Utterbackiana suborbiculata. Utterbackiana is a genus of five species from eastern North America.
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