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Lesquereusia Schlumberger 1845

Ralf Meisterfeld and Edward Mitchell
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Containing group: Lesquereusidae

Introduction

This genus was erected by Schlumberger (1845) and obviously named after the swiss naturalist Lesquereux. By lapsus it was first published as Lecqereusia. The currently used spelling was introduced by Hopkinson (in Cash & Hopkinson, 1909)!

Characteristics

The tests are characterised by an asymmetrical neck which is more or less attached to the body. Depending on the species the agglutinate test is either composed of endogenous siliceous rods or other collected mineral particles or a mixture of both.  The idiosomes or xenosomes are always fixed by a structured mesh-like cement (Fig. 1). All Lesqereusia spp. have an ovular nucleus.  16 species have been described, type species: Lesquereusia spiralis (Ehrenberg, 1840). Species differ mainly in shape of the siliceous rods, the amount of mineral particles used and the orientation of the neck.  Stump (1959) and Freeman (1974) have studied the mitosis in cultured material and the cytology (TEM and cytochemistry) has been studied by Harrison et al. (1975, 1976).

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Fig. 1: Structured cement of Lesquereusia modesta . © Ralf Meisterfeld

Habitat: Peryphyton, aquatic mosses or sediments. Feeding: herbivore (diatoms, green algae).

Other Names for Lesquereusia Schlumberger 1845

References

Thomas, R. & Gauthier-Lièvre, L. 1959a. Le genre Lesque¬reusia Schlumberger 1845 (Rhizopodes testacés). Bull. Soc. Hist. Nat. Afr. Nord, 50:34-83 , Pl. I, II.

Thomas, R. & Gauthier-Lièvre, L. 1961. Addenda et corrigenda le genre Lesquereusia Schlumberger. Bull. Soc. Hist. Nat. Afr. Nord, 52:162-163.

Ogden, C. G. & Hedley, R. H. 1980. An Atlas of Freshwater Testate Amoebae. Oxford University Press, Oxford.

Stump, A. B. 1959. Mitosis in the Rhizopod Lesquereusia spiralis. J. Protozool., 6:185-189.

Freeman, C. J. 1974. Shell formation, cell division and longevity in Lesquereusia spiralis (Ehrenberg) Penard and Pontigulasia vas (Leidy) Schouteden. PhD Thesis, Univ. S.C., 66 pp.

Harrison, F. W., Dunkelberger, D., Watanabe, N. & Stump, A. B. 1975. The cytology of the testaceous rhizopod Lesquereusia spiralis (Ehrenberg) Penard. I. Cytochemistry. Acta histochem., 54:71-77.

Harrison, F. W., Dunkelberger, D., Watanabe, N. & Stump, A. B. 1976. The cytology of the testaceous Rhizopod Lesquereusia spiralis (Ehrenberg) Penard. II. Ultrastucture and shell formation. J. Morph., 150:343-358.

Title Illustrations
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Scientific Name Lesquereusia spiralis
Specimen Condition Dead Specimen
Identified By Ralf Meisterfeld
Copyright ©
Scientific Name Lesquereusia modesta
Location Mt. Buffalo, Victoria, Australia
Identified By Ralf Meisterfeld
Copyright ©
About This Page

This page is being developed as part of the Tree of Life Web Project Protist Diversity Workshop, co-sponsored by the Canadian Institute for Advanced Research (CIFAR) program in Integrated Microbial Biodiversity and the Tula Foundation.


Rheinisch-Westfälische Technische Hochschule Aachen, Germany

Edward Mitchell
University of Neuchâtel

Correspondence regarding this page should be directed to Ralf Meisterfeld at and Edward Mitchell at

All Rights Reserved.

Citing this page:

Meisterfeld, Ralf and Edward Mitchell. 2008. Lesquereusia Schlumberger 1845. Version 02 September 2008 (under construction). http://tolweb.org/Lesquereusia/124522/2008.09.02 in The Tree of Life Web Project, http://tolweb.org/

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