Gyrinidae

Wallace, Gregory S., Lanning, Seth W., Mabee, William R., Combes, Matthew D. & Epler, J. H., 2016, New State Records, Habitat Characteristics, and Range Extensions for Three Aquatic Beetles (Coleoptera: Gyrinidae, Hydraenidae) from Wadeable Streams in Missouri, USA, The Coleopterists Bulletin 70 (4), pp. 907-910 : 907-910

Gyrinidae

(whirligig beetles)

Gyrinus marginellus Fall. USA, Missouri: Dent County; Sinking Creek (UTM Northing: 651203 and UTM Easting: 4146987); 30 September 2004; near margin of undercut bank in rootmat habitat: M. Hodge, W. Mabee; 3 adults. Sinking Creek is a cool, clear, spring-influenced stream located in the Current River basin. The collection site is in a losing section where flows are reduced or can disappear during extended periods without rainfall. Until now, the westernmost distribution records for G. marginellus were from Indiana ( Young 1988), Wisconsin ( Hilsenhoff 1990), Alabama (Oygur and Wolfe 1991), and Florida ( Epler et al. 2005; Epler 2010). Our record of G. marginellus for Missouri extends the known range for this species farther west than was previously documented.