PaleoDB taxon number: 177882
Alternative combination: Myalina spathi
Type specimen: AMNH 28349. Its type locality is Melrose, Claraia zone, Beaverhead County, which is in a Griesbachian marine mixed carbonate-siliciclastic in the Dinwoody Formation of Montana.
Ecology: facultatively mobile epifaunal suspension feeder
Average measurements (in mm): shell length 18.1, valve length 19.8