Some observations onGocevia placopus(Hülsmann, 1974), an amoeba with a flexible test, and onGocevia-like organisms from Denmark, with comments on the generaGoceviaandHyalodiscus

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Abstract
A large, discoid amoeba isolated from moss in an English wood was identified as belonging to the same species as an organism described from fresh water in Germany under the name Hyalodiscus placopus. Notable characters were the many narrow subpseudopodia by which it makes contact with the substratum during locomotion and a very flexible test which covers only the dorsal side in locomotion. This test or cuticle was found by electron-microscopy to be fibrous and spongiose in structure and by cytochemical tests to be at least partly polysaccharide in composition. On the basis of comparison with an organism described by Pussard. Senaud and Pons (1977), particularly the cuticle, this isolate is classified as Gocevia placopus (Hülsmann 1974), a member of the family Cochliopodiidae and the order Arcellinida. The nature of the cuticle of Gocevia now seems definitely established, although questions remain about some other characters of the genus. The status of the genus Hyalodiscus is still uncertain. Organisms of two different species from a pond in Denmark showed similarities to G. placopus suggesting that they belong to the same genus, although the presence of a cuticle is not certain.

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