Turbellaria

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Related to Turbellarians: phylum Platyhelminthes, Polychaetes
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Noun1.Turbellaria - free-living flatwormsTurbellaria - free-living flatworms    
planaria, planarian - free-swimming mostly freshwater flatworms; popular in laboratory studies for the ability to regenerate lost parts
class - (biology) a taxonomic group containing one or more orders
References in periodicals archive ?
The highest prevalence of 35% was observed in Praia do Cassino and the maximum intensity of four turbellarians was recorded in Mar del Plata.
On the other hand, the commercial sized specimens were parasitized by intracellular inclusions of bacteria-like organisms, ciliates, turbellarians and copepods.
Protists, nematodes, rotifers, small crustaceans, tardigrades, gastrotrichs, turbellarians, oligochaetes, and insect larvae are regularly found from psammon habitats (Thane-Fenchel, 1968; Whitman and Clark, 1984; Schmid-Araya, 1998, Kotwicki et al.
Average densities of turbellarians, nematodes, physid gastropods, sphaeriid bivalves and elmid beeries were also relatively high (Table 3).
Group B is represented mainly by sites with sandy sediments, low OM, high benthic density and dominance of oligochaetes and turbellarians.
proportion of taxa with hard parts that are likely to fossilize) is high in 14 % (bivalve and gastropod molluscs), intermediate in 26 % (brachiopods, echinoderms, arthropods) and low in 60 % that have only soft parts (polychaetes, turbellarians, oligochaetes, hemichordates and nemerteans) (see Vargas 1987, 1988 b).
Yet the system of spaces and channels between the grains of sand (porosity accounts for 32-40% of the total volume of sand on beaches and dunes) is an important habitat for the very specialized interstitial fauna (meiofauna) adapted to these conditions, which is dominated by nematodes, copepods, and turbellarians.
In soft-bottom marine communities, a growing body of evidence indicates that small predatory invertebrates, including polychaetes, amphipods, and meiofaunal turbellarians, have significant impacts on both the adults and settling larvae of benthic macrofauna, which demonstrably affect community structure in some cases and are suspected of doing so in others (Watzin, 1983, 1986, Commito and Ambrose 1985, Osman et al.
All of his preliminary and final paintings of the nudibranchs and turbellarians exist in the files of the Division of Mollusks, U.
Cnidaria * (Verrill, 1899) ** Turbellarians Platyhelminthes * * (flatworm) NI * Polyplacophora (quiton) Mollusca * NI *** Acmaea subrugosa Mollusca * * (Orbigny,1846) *** Fissurella clenchi Mollusca * (Farfante,1943) *** Littorina ziczac Mollusca * * (Gmelin, 1791) *** Brachidontes Mollusca * * solisianus (Orbigny, 1846) *** Ostrea sp.