Opalinida

Opalinida

Taxobox
color = greenyellow
name = Opalinida


image_width = 300px
image_caption =
domain = Eukaryota
regnum = Chromalveolata
divisio = Heterokontophyta
classis = Opalinea
ordo = Opalinida
subdivision_ranks = Genera
subdivision = "Opalina"
"Protoopalina"
"Cepedea"
"Zelleriella"

Opalinida is an order of protists. They are flat, unicellular, solitary flagellates which are all intestinal parasites of small aquatic vertebrates, such as frogs, toads, and fish. They do little damage to their hosts, mainly absorbing intestinal fluids commensally. Opalinid cells are covered with short flagella which look and act like cilia and usually a few longer flagella. Each organism has at least two nuclei. Many reproduce sexually. Their evolutionary lineage is unknown.

External links

* [http://parasitology.informatik.uni-wuerzburg.de/login/n/h/0995.html Parasitology of Opalinata, including Opalinida]


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  • Opalina — Opa·li·na (o″pə liґnə) [L. opalus opal] a genus of ciliate parasitic protozoa (order Opalinida, class Opalinatea) found as endocommensals in the colon of frogs and toads. The life cycle of O. ranaґrum involves asexual reproduction …   Medical dictionary

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