Lesquereusia extranea
L. extranea, left drawing after Awerintzew, other images after Thomas and Gauthier-Lièvre, 1959

Lesquereusia extranea Awerintzew, 1906

Diagnosis: Generally, the test resembles that of L. epistomium, but it also presents intermediate characters between those of the genera Lesquereusia and Pontigulasia; its shape is regularly lengthened, its diameter decreases towards the neck which is erected. The aperture of the pseudostome is an extension of the opening of the test, thus the spiral shape is greatly attenuated. The covering of the test is composed of short and thick vermiculated elements.

Dimensions: Awerintzew: Length 170 µm; width 105 µm; pseudostome 30 µm. Thomas et Gauthier-Lièvre: L. 105-110 µm; W 128 µm; neck 60 µm; pseudostome 28 µm.

Ecology: Freshwater. Russia, Africa.

Reference: Thomas, R. et Gauthier-Lièvre, L., 1959: Le genre Lesquereusia Schlumberger 1845 (Rhizopodes testacés). Bull. Soc. d’Hist. Nat. l’Afrique du Nord, 388, 50: 34-86.

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