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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Colacium

Colacium Ehrenberg, 1833 (ref. ID; 4950)

[ref. ID; 1618]
Stalked individuals form colony; frequently attached to animals such as copepods, rotifers, etc.; stalk mucilaginous; individual cells pyriform, ellipsoidal or cylindrical; without flagellum; a single flagellum only in free-swimming stage; discoidal chromatophores numerous; with pyrenoids; multiplication by longitudinal fission; also by swarmer, possessing a flagellum and a stigma; fresh water. (ref. ID; 1618)
  1. Colacium arbuscula Stein
    See; Colacium vesiculosum var. arbuscula (ref. ID; 4950)
  2. Colacium arcuatum Playf. (ref. ID; 4950)
  3. Colacium calvum Stein (ref. ID; 4950)
  4. Colacium cyclopicola (Gicklhorn) Bourrelly (ref. ID; 3517, 4950)
    Syn; Euglena cyclopicola Gicklhorn (ref. ID; 4950)
  5. Colacium elongatum Playfair (ref. ID; 4950)
  6. Colacium epiphyticum Fritsch (ref. ID; 4950)
  7. Colacium gojdiscae (Prescott) Huber-Pestalozzi (ref. ID; 4950)
    Syn; Euglena goidiscae Prescott (ref. ID; 4950)
  8. Colacium mucronatum Bourr. & Chad. (ref. ID; 4950)
  9. Colacium ovale Playf. (ref. ID; 4950)
  10. Colacium parasiticum (Sokoloff) Huber-Pestalozzi (ref. ID; 4950)
    Syn; Euglena parasitica Sokoloff (ref. ID; 4950)
  11. Colacium physeter (Fott) Fott
    See; Euglena physeter (ref. ID; 2671)
  12. Colacium pyrenophorum Bourr. (ref. ID; 4950)
  13. Colacium sanguineum Lackey (ref. ID; 4950)
  14. Colacium sideropus Skuja (ref. ID; 3517, 4950)
  15. Colacium simplex Huber-Pestalozzi (ref. ID; 4950 original paper)
  16. Colacium vesiculosum Ehrenberg (ref. ID; 1618, 3517, 4950)
  17. Colacium vesiculosum f. arbuscula (Stein) Huber-Pestalozzi (ref. ID; 1618, 3517, 4950)
    Syn; Colacium arbuscula Stein (ref. ID; 4950)
  18. Colacium vesiculosum f. natans (Lemm.) H.-P. (ref. ID; 4950)

Colacium vesiculosum Ehrenberg (ref. ID; 1618, 3517, 4950)

Descriptions

Solitary or colonial, made up of two to eight individuals; flagellate form ovoid to spindle; 7-10 elongate chromatophores along the periphery; flagellum up to twice the body length; a stigma; many paramylum bodies; palmella stage conspicuous; stalked form. (ref. ID; 1618)

Measurements

22 by 12 um. (ref. ID; 1618)