fbpx
Wikipedia

Lacrymaria olor

Lacrymaria olor is a species of ciliates, typically 100 micrometres (0.10 mm) long, that is found in freshwater ponds. Its name means "swan tear" in Latin, and refers to its general shape: namely, a teardrop-shaped cell with a small "head" at the end of a long slender "neck". The protist is notable for its ability to extend the anterior end of the cell up to 7 times its body length, and manipulate in many directions — even around obstacles — in order to capture its food.[1] For that reason it is a popular subject for amateur microscopists. The classification has been attributed to Müller (1786).[2]

Lacrymaria olor
Scientific classification
Domain:
(unranked):
Phylum:
Class:
Family:
Lacrymariidae
Genus:
Species:
L. olor
Binomial name
Lacrymaria olor
Synonyms

Vibrio olor O. F. Müller, 1786

The protist usually has two macronuclei and a single micronucleus. Its entire cell body is covered with cilia arranged in spirals. It has two contractile vacuoles, one at each end of the body. It contains small birefringent crystals.[1]

Lacrymaria olor can be easily reproduced in vitro, but cultivated populations are difficult to maintain for long. It can reproduce sexually, with each individual assuming either of two mating types ("sexes") at various times of the day. It can also reproduce asexually, possibly after an internal rearrangement of its genome; but there is evidence that this mechanism stops working after a certain number of consecutive asexual generations.[1] It can also regenerate a new head within minutes, if the original is cut off.[1]

Lacrymaria feed primarily on smaller organisms such as other ciliates, flagellates, and amoeba, but may sometimes tear chunks out of larger ciliates.[1]

Gallery edit

 
Lacrymaria olor - 160x
 
Lacrymaria olor
 
Lacrymaria olor
 
Lacrymaria olor
 
Lacrymaria olor. Left: isolated cell; middle: burrowing in debris with proboscis retracted; right: proboscis extended

See also edit

References edit

  1. ^ a b c d e Richard L. Howey, Ken Jones, Roy Winsby Lacrymaria Olor: Tear of a Swan 2010-10-24 at the Wayback Machine. Accessed on 2009-12-04.
  2. ^ Ward and Whipple, Fresh-water Biology. Cited by Howey.


lacrymaria, olor, species, ciliates, typically, micrometres, long, that, found, freshwater, ponds, name, means, swan, tear, latin, refers, general, shape, namely, teardrop, shaped, cell, with, small, head, long, slender, neck, protist, notable, ability, extend. Lacrymaria olor is a species of ciliates typically 100 micrometres 0 10 mm long that is found in freshwater ponds Its name means swan tear in Latin and refers to its general shape namely a teardrop shaped cell with a small head at the end of a long slender neck The protist is notable for its ability to extend the anterior end of the cell up to 7 times its body length and manipulate in many directions even around obstacles in order to capture its food 1 For that reason it is a popular subject for amateur microscopists The classification has been attributed to Muller 1786 2 Lacrymaria olor Scientific classification Domain Eukaryota unranked SAR Phylum Ciliophora Class Litostomatea Family Lacrymariidae Genus Lacrymaria Species L olor Binomial name Lacrymaria olor O F Muller 1786 Synonyms Vibrio olor O F Muller 1786 The protist usually has two macronuclei and a single micronucleus Its entire cell body is covered with cilia arranged in spirals It has two contractile vacuoles one at each end of the body It contains small birefringent crystals 1 Lacrymaria olor can be easily reproduced in vitro but cultivated populations are difficult to maintain for long It can reproduce sexually with each individual assuming either of two mating types sexes at various times of the day It can also reproduce asexually possibly after an internal rearrangement of its genome but there is evidence that this mechanism stops working after a certain number of consecutive asexual generations 1 It can also regenerate a new head within minutes if the original is cut off 1 Lacrymaria feed primarily on smaller organisms such as other ciliates flagellates and amoeba but may sometimes tear chunks out of larger ciliates 1 Gallery edit nbsp Lacrymaria olor 160x nbsp Lacrymaria olor nbsp Lacrymaria olor nbsp Lacrymaria olor nbsp Lacrymaria olor Left isolated cell middle burrowing in debris with proboscis retracted right proboscis extendedSee also editDileptus anserReferences edit a b c d e Richard L Howey Ken Jones Roy Winsby Lacrymaria Olor Tear of a Swan Archived 2010 10 24 at the Wayback Machine Accessed on 2009 12 04 Ward and Whipple Fresh water Biology Cited by Howey Lacrymaria olor page at the Encyclopedia of Life Accessed on 2009 12 04 nbsp This ciliate related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Lacrymaria olor amp oldid 1221145234, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.