Nem: Nematoda, Cop: Copepoda, Nau: Nauplii, Pol: Polychaeta, Aca: Acari, Cum: Cumacea, Gas: Gastrotricha
, Olig: Oligochaeta, Kin: Kinorhyncha Station Nem Cop Nau Pol Aca 3 0-2 cm 98.
Abundance of Protista, Rotifera, Crustacea, Gastrotricha, Tardigrada and Nematoda
Despite the natural low presence of Tardigrada and Gastrotricha, the Jar method detected them in higher concentrations than in the other two.
The abundance of Tartigrada and Gastrotricha demonstrated better results for the Jar method, and Nematoda for the Dredge method.
Currently, the phylum Gastrotricha is divided into the orders Macrodasyida and Chaetonotida, with the structure of the myoepithelial pharynx being an important distinguishing feature.
Furthermore, the relationship of Gastrotricha to other extant metazoans is uncertain; results from recent molecular and morphological studies are in conflict (Winnepenninnckx et al.
Zoogeography and speciation in marine Gastrotricha
These duo-gland adhesive organs are very frequently found in small invertebrates inhabiting the interstitial environment--for example, in Turbellaria (Tyler, 1976); in Gastrotricha
(Tyler and Rieger, 1980); in Nematoda (Adams and Tyler, 1980); and in Polychaeta (Gelder and Tyler, 1986).