Tricladida

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Tricladida

[trī′klad·əd·ə]
(invertebrate zoology)
The planarians, an order of the Turbellaria distinguished by diverticulated intestines with a single anterior branch and two posterior branches separated by the pharynx.
References in periodicals archive ?
In contrast to triclads and polyclads, which are collected directly, microturbellarians should be sampled with some substratum using a fine-meshed sweep-net (Young, 2001).
tigrina we observed this irregular segmentation followed by aggregation into a solid blastema, as described for some other triclads (Thomas, 1986).
In triclads, asynchronous development in eggs of the same cocoon can occur (Benazzi and Gremigni, 1982), but in G.
The morphological changes documented on the cocoons of triclads came mainly from detailed studies in P.
Between the better studied freshwater triclads, a regular blastula-shaped structure was described only by Mattiesen (1904) and Koscielski (1966) for Dendrocoelum lacteum Oersted, 1844.
A key of the freshwater triclads of Britain and Ireland with notes on their ecology.
An embryonic digestive system, consisting of mouth, pharynx and intestine, which is involved in swallowing and digestion of the yolk, was described for several triclad species (Curtis, 1902; Mattiesen, 1904; Fulinski, 1938; Le Moigne, 1963).