Lesquereusia bispiralis
L. bispiralis, after Thomas and Gauthier-Lièvre, 1959

Lesquereusia bispiralis Thomas et Gauthier-Lièvre, 1959

Diagnosis: Neck with two septa. The neck is not cylindrical or conical, but abruptly bent, which causes a change in its direction: whereas at the beginning it followed the direction of the winding of the test, it is raised at an right angle, which gives it a distinctive and unusual appearance. The test is covered with quartz particles.

Dimensions: Length 300 µm; Width 170 µm; pseudostome 50 µm.

Ecology: Freshwater. 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.

Recent posts

Difflugia key ovoid

Difflugia Ovoid Group Key characters: Test in cross section rounded. Test with rounded fundus. Pseudostome with smooth circular edge. Test ovoid. 1 Test with collar

Read More »

Difflugia: ovoid tests

Difflugia – group 1 Test < 60 µm. Test in cross section rounded. Test with rounded fundus. Pseudostome with smooth circular edge. Test not spherical

Read More »

Difflugia ampla

Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded

Read More »

Difflugia parva

Difflugia parva, from Gauthier-Lièvre et Thomas, 1958 Difflugia parva  (Thomas, 1954) Ogden, 1983 = Difflugia oblonga var. parva Thomas, 1954 Diagnosis: Test pyriform, tapering evenly from

Read More »