Lesquereusia

Lesquereusia Schlumberger, 1845 (ref. ID; 2290, 3686), Lecquereusia Schlumberger, 1845 (ref. ID; 3693)

Rhizopoda: Testacea: Order Testacealobosa De Saedeleer, 1934: Eulobosa: Family Nebelidae Taranek, 1882 (ref. ID; 7500)
Nebelinae Deflandre (ref. ID; 7501)

[ref. ID; 1618]
Test compressed, oval or globular in profile, narrowed at bent back; semispiral in appearance; with curved of comma-shaped rods or with sand-grains (in one species); body does not fill up the test; pseudopodia simple or branched; fresh water. (ref. ID; 1618)

[ref. ID; 1923]
Shell spiral, more or less compressed, largely composed of minute curved, rodlike plates. (ref. ID; 1923)

[ref. ID; 2290]
Shell colourless, compressed ovoid or globose with asymmetrical neck, giving the appearance of a spiral, composed of interwoven siliceous rods and sometimes particles of quartz; aperture circular. (ref. ID; 2290)

[ref. ID; 3686]
Shell colourless; ovoid with an unsymmetrical neck; composed of siliceous curved rods sometimes with agglutinated mineral particles; aperture terminal, circular. (ref. ID; 3686)

  1. Lesquereusia epistomium Penard, 1902 (ref. ID; 1923, 2066, 2290, 3686) reported year? (ref. ID; 3595), Lecquereusia epistomium Penard, 1902 (ref. ID; 3693 original paper)
    Syn; Lecquereusia jurassica var. epistomium Penard (ref. ID; 3693)
  2. Lesquereusia gibbosa Gauthier-Lievre & Thomas (ref. ID; 2152, 2456)
  3. Lecquereusia jurassica Schlumberger
    See; Lesquereusia spiralis (ref. ID; 3693)
  4. Lecquereusia jurassica var. epistomium Penard
    See; Lesquereusia epistomium (ref. ID; 3693)
  5. Lesquereusia modesta Rhumbler, 1895 (ref. ID; 2290, 2441, 3686) or 1896 (ref. ID; 1923, 2109, 2147, 2242) reported year? (ref. ID; 2356, 3595, 3693)
    Syn; Difflugia spiralis Fresenius, 1858 (ref. ID; 1316) or Leidy (ref. ID; 3693)
  6. Lesquereusia modesta var. acuminata (ref. ID; 2242)
  7. Lesquereusia modesta Rhumbler var. inaequalis (Playfair) Decloitre (ref. ID; 3595)
  8. Lesquereusia modesta var. minima Van Oye (ref. ID; 2564 original paper)
  9. Lesquereusia modesta var. minor Van Oye (ref. ID; 2330 original paper)
  10. Lesquereusia pseudonebeloides Golemansky, 1964 (ref. ID; 2108 original paper)
  11. Lesquereusia spiralis Ehrenberg, 1840 (ref. ID; 3686) reported year? (ref. ID; 1618, 1923, 2242, 2290, 2330, 2356, 2564, 2683) or (Ehrenberg) Butschli, 1880 (ref. ID; 2147, 2236, 2441) reported year? (ref. ID; 3595) or (Ehrenberg, 1840) Schlumberger, 1845 (ref. ID; 2109), Lecquereusia spiralis Ehrenberg (ref. ID; 3693)
    Syn; Difflugia helix Cohn, 1853 (ref. ID; 1316) reported year? (ref. ID; 3693); Difflugia spiralis Ehrenberg, 1840 (ref. ID; 1316) reported year? (ref. ID; 3693); Lecquereusia jurassica Schlumberger (ref. ID; 3693)
  12. Lesquereusia spiralis (Ehrenberg) Butschli var. decloitrei Van Oye, 1959 (ref. ID; 2236)
  13. Lesquereusia spiralis (Ehrenberg) Butschli var. dentata Decloitre (ref. ID; 3595)

Lesquereusia epistomium Penard, 1902 (ref. ID; 1923, 2066, 2290, 3686) reported year? (ref. ID; 3595), Lecquereusia epistomium Penard, 1902 (ref. ID; 3693 original paper)

Synonym

Lecquereusia jurassica var. epistomium Penard (ref. ID; 3693)

Descriptions

Plates thick, short, shell slightly compressed. Neck very sharply distinguished from the rounded shell and very abruptly turned to one side. Rods disposed as in L. spiralis, but reniform and stouter. Habitat Sphagnum swamps; not frequent. (ref. ID; 1923)
The shell colourless, ovoid or circular with a distinct long neck. The neck is joined to the body of the shell at an angle, so that it has one short and one long side. It is composed mainly of curved, siliceous rods and the occasional quartz particle. The aperture is roughly circular and surrounded by siliceous rods. (ref. ID; 3686)

Comments

This species is similar to L. spiralis but can be differentiated from it by the elongated neck and more circular body. (ref. ID; 3686)

Measurements

Length 110-125 um. (ref. ID; 1923)
Length of shell 138; breadth of shell 113; diameter of aperture 36 um (n=1). (ref. ID; 3686)

Lesquereusia modesta Rhumbler, 1895 (ref. ID; 2290, 2441, 3686) or 1896 (ref. ID; 1923, 2109, 2147, 2242) reported year? (ref. ID; 2356, 3595, 3693)

Synonym

Difflugia spiralis Fresenius, 1858 (ref. ID; 1316) or Leidy (ref. ID; 3693)

Descriptions

Shell primarily of sand grains, few plates. Often with a Difflugia-like appearance; neck short and broad, slightly turned to one side. Nucleus single. Pseudopods few, large, and long. Habitat mostly bogs, among Sphagnum, also ponds in the ooze with the large Difflugia. (ref. ID; 1923)
The shell is colourless, circular with an unsymmetrical neck, and is slightly flattened laterally. It is composed of a mixture of siliceous rods and grains of quartz. The aperture is terminal circular and bordered by siliceous rods or small particles of quartz. (ref. ID; 3686)

Measurements

Length 100-150 um. (ref. ID; 1923)
Diameter approx. 110 um. (ref. ID; 2356)
Length of shell 109-174; breadth of shell 100-159; depth of shell 75-112; diameter of aperture 25-43 um (n=22). (ref. ID; 3686)

Lesquereusia spiralis Ehrenberg, 1840 (ref. ID; 3686) reported year? (ref. ID; 1618, 1923, 2242, 2290, 2330, 2356, 2564, 2683), (Ehrenberg) Butschli, 1880 (ref. ID; 2147, 2236, 2441) reported year? (ref. ID; 3595) or (Ehrenberg, 1840) Schlumberger, 1845 (ref. ID; 2109), Lecquereusia spiralis Ehrenberg (ref. ID; 3693)

Synonym

Difflugia helix Cohn, 1853 (ref. ID; 1316) reported year? (ref. ID; 3693); Difflugia spiralis Ehrenberg, 1840 (ref. ID; 1316) reported year? (ref. ID; 3693); Lecquereusia jurassica Schlumberger (ref. ID; 3693)

Descriptions

Aperture circular; border distinct; cytoplasm appears pale yellow; a single nucleus; mitosis requires about forty-five to fifty minutes; number of chromosomes 175-200; in marsh water. (ref. ID; 1618)
Shell homogenous with a meshwork of short curved rods, transparent. Neck prominent, sharply turned to ones side. Nucleus single, situated posteriorly. Pseudopods as in Difflugia. A handsome rhizopod, widely distributed throughout the world. Habitat marshes, among Sphagnum and other subaquatic vegetation. (ref. ID; 1923)
The shell is colourless, circular or ovoid with an unsymmetrical neck, and slightly flattened laterally. It is composed of numerous, siliceous curved rods interspersed with a meshwork of organic cement. The organic cement matrix between the rods has a distinctive rosette-like pattern. The aperture is terminal, circular and bordered by siliceous rods. (ref. ID; 3686)

Measurements

96-188 by 68-114 um. (ref. ID; 1618)
Length 110-140 um. (ref. ID; 1923)
Diameter approx. 75 um. (ref. ID; 2356)
The total length of the test was about 136 um. (ref. ID; 2683)
Length of shell 89-117; breadth of shell 86-109; depth of shell 62-84; diameter of aperture 23-31 um (n=8). (ref. ID; 3686)