Table 1.

Tetrahymena thermophila strains used

Name	Distributor and reference	Geographic origin	Isolator and isolation date
D2	F. P. Doerder 18282-4	PA, USA – pond CRWP	F. P. Doerder, 2002
D3	F. P. Doerder 18296-1	PA, USA – pond SG29	F. P. Doerder, 2003
4A	CCAP 1630/4A	Unknown	Unknown
M	CCAP 1630/M	Unknown, USA	A. Phelps, 1948
P	CCAP 1630/P	Unknown, USA	A. Phelps, 1948
Q	CCAP 1630/Q	Unknown, USA	A. Phelps, 1948
20	CCAP 1630/20	Unknown	Unknown
B	ATCC 30384 (B-18687)	Woodshole, MA, USA	E.M. Simon & D.L. Nanney, 1952 S.L. Allen
E	ATCC 205043 (ME 44w)	Maine, USA – McCurdy Pond, Pemaquid.	E.M. Simon & D.L. Nanney, 1986
7	ATCC 30306 (1726 A1)	Woodshole, MA, USA	D.L. Nanney, 1953.

CCAP [90]; ATCC [91]; P. Doerder: strains collected by F. P. Doerder, Cleveland State University, Ohio, USA. All CCAP strains mated with at least one ATCC or Doerder strain, proving that they were T. thermophila.