Results 161 to 170 of about 47,550 (221)

Biology of the Phylum Nematomorpha

Advances in Parasitology, 2005
Compared with most animal phyla, the Nematomorpha, also known as hair worms, is a relatively understudied metazoan phylum. Although nematomorphs make up only 1 of 3 animal phyla specializing solely on a parasitic life style, little attention has been focused on this enigmatic group scientifically. The phylum contains two main groups.
Andreas Schmidt-Rhaesa
exaly   +3 more sources

Bipolarity in thick filaments of Nematomorpha

Journal of Molecular Biology, 1977
Thick filaments of horse-hair worms muscles are characterized by asymmetrical periods 670 to 700 A long. A reversal zone, with centro-symmetrical periods has been observed; therefore these filaments are bipolar, as required for the sliding filament contraction mechanism.
G, Lanzavecchia, R, Valvassori, M, De Egiuleor   +2 more
openaire   +2 more sources

Ultrastructural features of a Gordian worm (Nematomorpha)

Journal of Ultrastructure Research, 1974
The major tissues of a horsehair worm (Gordius sp., Nematomorpha) were studied by transmission and scanning electron microscopy. The epicuticle is a thin superficial layer whose surface shows rows of polygonal elevations. The cuticle has many layers of cylindrical, nonperiodic collagenous fibers, spirally wound about the long axis of the worm ...
R M, Eakin, J L, Brandenburger
openaire   +2 more sources

Morphology of Larval Gordius dimorphus (Nematomorpha: Gordiida)

Journal of Parasitology, 2009
Scanning electron microscopy was used to analyze superficial features of Gordius dimorphus Poinar, 1991, larvae that might serve as generic or specific diagnostic characters. Three adults of G. dimorphus (2 males and 1 female) were maintained under laboratory conditions until oviposition, which occurred within long strings commonly referred to as egg ...
N C, Marchiori, J, Pereira, L A S, Castro   +2 more
openaire   +2 more sources

The rod-shaped sperm of Gordioidea (Aschelminthes, Nematomorpha)

Journal of Ultrastructure Research, 1977
The spermatozoon of hair worm Gordius panighettensis (Nematomorpha, Gordioidea) has been studied under the electron microscope in the male genital tract. This immotile, rod-like sperm is made up of an acrosomal complex and an elongated nucleus with chromatin condensed in the central part.
C L, Donin, F, Cotelli
openaire   +2 more sources

Occurrence of Paramyosin among the Nematomorpha

Nature New Biology, 1971
PREVIOUSLY, the longitudinal body wall muscles of freshwater nematomorphs were considered to be histologically similar to the coelomyarian type muscle fibres common among nematodes1, 2 and, although double oblique striations were found by Rauther3 in nematomorph muscle preparations, their underlying structure remained unknown. But on the basis of ultra-
openaire   +2 more sources