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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Pelatractus

Pelatractus Kahl, 1930 (ref. ID; 2013, 3540 original paper)

Class Kinetofragminophora: Subclass Gymnostomata: Order Prostomatida: Suborder Prostomatina: Family Metacystidae (ref. ID; 2013)

[ref. ID; 2013]
Body shape elongate ovoid, greatest width about one-third of body length from anterior. Apical end truncated transversely. Somatic ciliation uniform, arising from bipolar kinetosomes which are somewhat irregularly arranged. Circular oral aperture apical, leading to wide permanent cytopharynx. The ciliature around the oral aperture (peribuccal cilia) is simple and consists of 5 rings of dense cilia, the most apical ring apparently being constructed of 2 or 3 cilia. No caudal tuft of cilia. Sometimes found in a thin membranous lorica. Macronucleus rounded, contractile vacuole terminal. Found in anaerobic muds feeding on sulfur bacteria.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)
  1. Pelatractus constractus Wang & Nie (ref. ID; 1335)
  2. Pelatractus grandis Penard, 1922 (ref. ID; 1619, 3540) reported year? (ref. ID; 1618)
    Syn; Vasicola grandis (Penard) (ref. ID; 1618)
  3. Pelatractus lacrymariaeformis Kahl, 1930 (ref. ID; 3540 original paper, 4488) reported author and year? (ref. ID; 1619)
    Syn; Metacystis daphnicola Kahl, 1926 (ref. ID; 1619, 3540)

Pelatractus grandis Penard, 1922 (ref. ID; 1619, 3540) reported year? (ref. ID; 1618)

Synonym

Vasicola grandis (Penard) (ref. ID; 1618)

Descriptions

Free-swimming; elongated fusiform; numerous contractile vacuoles on one side; sapropelic in fresh water. (ref. ID; 1618)

Measurements

Body 125-220 um long. (ref. ID; 1618)