Lecythium

Lecythium Hertwig & Lesser (ref. ID; 1618)

[ref. ID; 1618]
Test thin, flexible, colorless; aperture elastic, terminal; colorless cytoplasm fills the test; large nucleus posterior; numerous filopodia long, branching, not anastomosing; fresh water. (ref. ID; 1618)

[ref. ID; 1923]
Shell thin, hyaline, and flexible. Aperture circular or oval, elastic. (ref. ID; 1923)

  1. Lecythium hyalinum Ehrenberg (ref. ID; 1618, 1923), (Ehrenberg) Hertwig & Lesser (ref. ID; 2259) or Hertwig & Lesser (ref. ID; 3693)
    See; Pamphagus hyalinus (ref. ID; 3693)
  2. Lecythium kryptosis Chardez, 1971 (ref. ID; 2144 original paper)
  3. Lecythium mutabile Bailey (ref. ID; 1923)

Lecythium hyalinum Ehrenberg (ref. ID; 1618, 1923), (Ehrenberg) Hertwig & Lesser (ref. ID; 2259) or Hertwig & Lesser (ref. ID; 3693)

See

Pamphagus hyalinus (ref. ID; 3693)

Descriptions

Spheroidal; aperture circular with a short flexible neck; a single contractile vacuole; in submerged vegetation. (ref. ID; 1618)
Envelope hyaline, spherical, or pyriform. Aperture large and capable of great dilatation. The protoplasm is clear and colorless, with a large spherical nucleus; contractile vacuole single. Pseudopodia numerous, straight and pointed, sometimes branched. Habitat, clear water and submerged Sphagnum. (ref. ID; 1923)

Measurements

Diameter 20-45 um. (ref. ID; 1618)
Diameter 30-48 um. (ref. ID; 1923)

Lecythium mutabile Bailey (ref. ID; 1923)

Descriptions

Envelope yellow, pyriform, transverse section lenticular or arcuate. Aperture small, as elastic as in L. hyalinum. Shell very changeable in form, often distored by the ingestion of large diatoms. Protoplasm enclosing brilliant granules. Nucleus large, spheric. Contractile vacuoles 1 or 2. Habitat clear water, among aquatic vegetation. (ref. ID; 1923)

Measurements

Diameter 40-70 um and up to 140 um. (ref. ID; 1923)