We here report on sinistral C. decisum from the Fox River basin near Algonquin, Illinois. Nineteen specimens of C. decisum from “Mill Pond (near creek), Algonquin, Illinois,” were found in the University of Illinois Museum of Natural History Mollusk Collection, Champaign-Urbana (UIMNH 18288); no date was given for this lot but the collector, the Rev. W. A. Nason, died in 1921. In addition, a relict sinistral C. decisum shell was collected by JST while conducting a freshwater mussel survey in the Fox River at Buffalo Park Forest Preserve near Algonquin (42.1486 N, 88.2900 W), Kane County, Illinois, on 25 July 2007. This specimen was extracted from silt-compacted gravel in an impounded area of the river and has been deposited in the Illinois Natural History Survey Mollusk Collection, Champaign (INHS 31862).
|Original language||English (US)|
|State||Published - 2008|