Class Monogononta-Order Flosculariacea

Family Testudinellidae*

* ITIS separates Testudinellidae into 3 separate families: Filinidae (including Filinia), Testudinellidae (including Testudinella and Pompholyx) and Trochosphaeidae (including Trochosphaera). Stemberger places them all in a single family, and other references variously split them into 2 families.

Image Link	Scientific Name	Lake Superior*	Lake Michigan	Lake Huron	Lake Erie	Lake Ontario	Habitat
	Filinia spp.		x	x	x	x
	Filinia brachiata		x		x	x	Spring through fall in rivers and harbors.
	Filinia longiseta		x	x	x	x	Late spring.
	Filinia terminalis		x	x			Winter and spring.
	Pompholyx sulcata		x	x	x	x	Found in nearshore areas and eutrophic embayments. Peaks in summer.
	Testudinella spp.				x		Uncommon, littoral.
	Testudinella parva
	Testudinella patina triloba				x
	Testudinella reflexa				x
	Trochosphaera solstitialis				x

Based on: A Guide to the Rotifers of the Laurentian Great Lakes. RS Stemberger. 1979. U.S. EPA. EPA-600.
with additions from:
A Lakewide Comparison of Zooplankton Biomass and Its Species Composition in Lake Erie, 1983-87. Makarewicz, Joseph C.J. Great Lakes Res. 19(2):275-290. 1993.
A Decade of Predatory Control of Zooplankton Species Composition of Lake Michigan. Makarewicz, Joseph C., Bertram, Paul, Lewis, Theodore, and Brown, Jr., Edward H. J. Great Lakes Res. 21(4):620-640. 1995.
Feasibility of Shoreside Monitoring of the Great Lakes. Makarewicz, Joseph C. J. Great Lakes Res. 17(3):344-360. 1991.
Lake Huron Rotifer and Crustacean Zooplankton, APRIL-JULY, 1980. Evans, Marlene S. J. Great Lakes Res. 12(4):281-292. 1986.
Seasonal Abundance of Planktonic Rotifers in a Nearshore Area of Central Lake Michigan. Duffy, Walter G., and Liston, Charles R. J. Great Lakes Res. 4(1):46-49. 1978.

*None of the consulted references included information on Lake Superior rotifers.

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