Ref ID : 7806
John O. Corliss; Type-specimens for the ten species of Tetrahymena (Protozoa: Ciliophora). Trans.Amer.Micros.Soc. 90(2):243-252, 1971
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After establishing the particular need for deposition of type-specimens for the ten recognized species of the important hymenostome ciliate genus Tetrahymena, description of such material is presented. Care has been taken to follow both the spirit and the letter of the law of the pertinent provisions of the International Code of Zoological Nomenclature. The situation is especially complex for members of this genus because of its very long and often confused taxonomic-nomenclatural history. Making available well preserved type material, now possible for many soft-bodied protozoa since the advent of methods of silver impregnation, should contribute measurably to the future nomenclatural stability of ciliates in the Tetrahymena group. No holotype material exists for the ten species treated in the present paper. Lectotypes have now been deposited for three: T. chironomi, T. paravorax, and T. setifera. Neotypes, with some reluctance (but no alternatives exist), have been deposited for the remaining seven: T. corlissi, T. limacis, T. pyriformis (type-species of the genus), T. patula, T. rostrata, T. stegomyiae, and T. vorax. Discussion of each species and its type material is arranged according to the three infrageneric complexes currently recognized: the pyriformis complex, the rostrata complex, and the patula complex.