Platyhelminthes

(redirected from Platyhelminths)
Also found in: Dictionary, Thesaurus, Encyclopedia.

Platyhelminthes

 [plat″ĭ-hel-min´thēz]
the flatworms, a phylum of acoelomate, dorsoventrally flattened, bilaterally symmetrical animals; it includes the classes cestoidea (tapeworms) and trematoda (flukes).

Plat·y·hel·min·thes

(plat'i-hel-min'thēz),
A phylum of flatworms that are bilaterally symmetric, flattened, and acelomate. There is no digestive tract in some platyhelminths (Cestoda), or the gut may be incomplete (without an anus), as in the Trematoda; most of the forms are hermaphroditic. There are three major classes, but the parasitic species of medical and veterinary importance are in the subclass Cestoda (the true tapeworms) of the class Cestoidea, and in the subclass Digenea (the digenetic flukes) of the class Trematoda.

Platyhelminthes

/Platy·hel·min·thes/ (-hel-min´thēz) a phylum of acoelomate, dorsoventrally flattened, bilaterally symmetrical animals, commonly known as flatworms; it includes the classes Cestoidea (tapeworms) and Trematoda (flukes).

Platyhelminthes

[plat′ihelmin′thēz]
Etymology: Gk, platys, broad, helmins, worm
a phylum of flatworms that includes parasitic tapeworms (class Cestoda) and flukes (classes Monogenea and Trematoda) as well as mostly free-living species, such as planarians (class Turbellaria).

Plat·y·hel·min·thes

(plat'i-hel-min'thēz)
A phylum of flatworms that are bilaterally symmetric, flattened, and acelomate. Parasitic species of medical importance are in the subclass Cestoda (the true tapeworms) of the class Cestoidea, and in the subclass Digenea (the digenetic flukes) of the class Trematoda.

Plat·y·hel·min·thes

(plat'i-hel-min'thēz)
A phylum of flatworms that are bilaterally symmetric, flattened, and acelomate.
References in periodicals archive ?
Patterns of sexual reproduction among parasitic platyhelminths.
Adaptive plasticity, Cercomeria, Digenea, Eucestoda, evolutionary loss, macroevolution, Monogenea, morphological diversification, parasitic platyhelminths, phylogenetic system-
2009) includes molluscs, annelids, nemertines, the lophophorates, platyhelminths, and other smaller phyla).
Originally identified in mammalian tissues, NO has been identified in the signaling cascades of many invertebrates such as coelenterates, platyhelminths, nematodes, annelids, molluscs, arthropods, echinoderms, and urochordates (Martinez, 1995; Midler, 1997).
A good example is the mariner which, by being functional in both germ lines and somatic cell lines, could infect many organisms, crossing several phyletic borders (arthropods, platyhelminths, nematodes, chordates), probably by splicing into viral or other pathogenic genomes.
The early emergence of platyhelminths is contradicted by the agreement between 18S r RNA and Hox genes data.
Oblique striation has been described for muscles of platyhelminths, nematodes, gastrotrichs, nematomorphs, priapulids, pogonophora, chaetognathes, annelids, molluscs, brachiopods, and an echinoderm (3-7, 9), and dense bodies are an obvious feature in all taxa.