Nemathelminthes


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Nemathelminthes

[‚nem·ə‚thel′min·thēz]
(invertebrate zoology)
A subdivision of the Amera which comprised the classes Rotatoria, Gastrotrichia, Kinorhyncha, Nematoda, Nematomorpha, and Acanthocephala.

Nemathelminthes

 

(also Aschelminthes), a phylum of invertebrates including the classes Gastrotricha, Kinorhyncha, Rotatoria, Nematoda, Nematomorpha, Acanthocephala, and Priapulida. The unsegmented body is more or less completely covered with a cuticle. The sense organs include eyes, olfactory pits, and tactile organs. Between the dermomuscular tube and the gut there is a broad buccal cavity. The alimentary canal begins with a rudimentary mouth and ends in an anus. The excretory organs are protonephridia, or modified skin glands. There is no respiratory or circulatory system. The nerve system consists of a brain and nerve stems. The sexes are separate.

Some zoologists treat the phylum as a subphylum of Scolecida.

References in periodicals archive ?
synagris de las zonas de neguanje y santa Marta esta altamente representado por el subphylum nemathelminthes; algunos de los generos reportados en este trabajo se conocen en diferentes hospedadores y areas geograficas; pero para las zonas de estudio la mayoria de los nematodos descritos son registros nuevos, lo cual amplia considerablemente la distribucion geografica de estas especies, dentro de los cuales se observa una alta predominancia del genero Raphidascaris, el cual se presento en las dos especies de pargo examinadas.
Few specimens from the Phylum Mollusca and Nemathelminthes were collected.
Wild animals endoparasites (Nemathelminthes and Plathelminthes) from the Manu Biosphere Reserve, Peru.