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Male nematodes may have one or two spicules which serve to open the vulva of females and facilitate the transmission of sperm, although sperm is not transferred directly by or through the spicules. [2] [3] The gubernaculum is another organ of the nematode male copulatory system which guides the spicules during copulation.
English: Anatomical drawing of a male C. elegans nematode with emphasis on the reproductive system. Note that the actual worm is colorless and transparent. Also note that the raw SVG version of the image will not render correctly in Firefox 23.0.1 or earlier (possibly later as well) due to known Mozilla program bug #376027 but should do so in any other browser.
Mesorhabditis is a genus of nematodes.. Species in the genus Mesorhabditis exhibit an unusual form of parthenogenesis, in which sperm-producing males copulate with females, but the sperm do not fuse with the ovum.
It also has some of the same organ systems as larger animals. About one in a thousand individuals is male and the rest are hermaphrodites. [19] The basic anatomy of C. elegans includes a mouth, pharynx, intestine, gonad, and collagenous cuticle. Like all nematodes, they have neither a circulatory nor a respiratory system.
Extremity of a male nematode showing the spicule, used for copulation, bar=100 μm [48] Most nematode species are dioecious, with separate male and female individuals, though some, such as Caenorhabditis elegans, are androdioecious, consisting of hermaphrodites and rare males. Both sexes possess one or two tubular gonads. In males, the sperm ...
The spermatheca (pronounced / s p ər m ə ˈ θ iː k ə / pl.: spermathecae / s p ər m ə ˈ θ iː s iː /), also called receptaculum seminis (pl.: receptacula seminis), is an organ of the female reproductive tract in insects, e.g. ants, bees, [1] some molluscs, Oligochaeta worms and certain other invertebrates and vertebrates. [2]
The primary structures are the Rhabditida-specific mouth, the pharynx, the intestine, the reproductive system (uterus, spermatheca, gonads) and the cuticle. Like all nematodes , it has four muscle bands that span the length of the body and has no devoted respiratory or circulatory system. [ 6 ]
Page information; Cite this page; ... Longidurus pisi - A is a female and B is a male. The image also shows reproductive parts etc. ... (PDF). Zoological Journal ...