Hexamethytdisilazane for Scanning Electron Microscopy of Gastrotricha
Hemoglobin-containing cells of Neodasys (Gastrotricha
, Chaetonotida) II.
Comparative sperm ultrastructure of Neodasys ciritus and Musellifer delamarei, two species considered to be basal among chaetonotida (Gastrotricha
Therefore certain phyla (e.g., Rotifera, Gastrotricha
) and most larvae and freshwater taxa are not covered.
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., 1995; Littlewood et al., 1996; and Wallace et al., 1996).
(1996) expressed the conviction, based on their restriction-fragment length polymorphism analyses, that the proposed cosmopolitan species Xenotrichula intermedia (Gastrotricha), apparently present both in the Mediterranean Sea and along the coast of North America (Ruppert, 1977), consists of more than one taxon.
Zoogeography and speciation in marine Gastrotricha. in The Meiofauna Species in Time and Space.
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).