Trichodina

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Trichodina
Electron microscope image of a trichodina on the gills of a mullet

Electron microscope image of a trichodina on the gills of a mullet

Systematics
without rank: Conthreep
without rank: Oligohymenophorea
without rank: Peritrichia
Order : Mobilida
Family : Trichodinidae
Genre : Trichodina
Scientific name
Trichodina
Ehrenberg , 1830

Trichodina is a symphorionic genus from the group of ciliates .

description

The body is flat-cylindrical to disk-shaped. The hooks of the three-part hook ring, which is used to adhere to the ground and move, consist of straight or curved outer hooks, a thin, elongated rod-shaped, spiked or needle-shaped inner hook and a widened central part.

The adoral eyelash spiral, facing away from the ground and serving as a mouth opening, runs around the end of the body in a circle between 360 ° and 540 °.

Distribution and way of life

Trichodina species are found in standing and flowing fresh and salt water worldwide, with the exception of the Antarctic . They colonize the skin of fish, amphibians, moss animals and cnidarians , but also occur freely floating. In weakened fish, as weakness parasites, they can damage the skin in mass infestation and cause trichodiniosis . Like all ciliates, they filter particles from the water around them.

Taxonomy

The genus was first described by Christian Gottfried Ehrenberg in 1830 , the type species is Trichodina pedunculus . More than 170 species have been described for the genus, of which around 70 species are no longer recognized due to insufficient descriptions.

Individual evidence

  1. ^ A b Rudolf Röttger: Dictionary of Protozoology , in: Protozoological Monographs, Vol. 2 (2001), p. 218, ISBN 3826585992
  2. ↑ a b c d Linda Basson, JG Van As: Differential diagnosis of the genera in the family Trichodinidae (Ciliophora: Peritrichida) with the description of a new genus ectoparasitic on freshwater fish from southern Africa in: Syst. Parasitol., 1989, Vol. 13, p. 153, https://doi.org/10.1007/BF00015224
  3. ↑ Denis H. Lynn, Eugene B. Small: Ciliophora, Peritrichia In: John J. Lee, GF Leedale, P. Bradbury (Eds.): An Illustrated Guide to the Protozoa . tape 2 . Allen, Lawrence 2000, ISBN 1-891276-23-9 , pp. 531 .
  4. ^ William Hugo Gaze, Rodney Wootten: Ectoparasitic species of the genus Trichodina (Ciliophora: Peritrichida) parasitizing British freshwater fish in: Folia Parasitologica, Vol. 45, pp. 177-190, 1998

Web links

Commons : Trichodina  - collection of images, videos and audio files