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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 ...
A long nematode compared to other plant parasitic nematodes at 2–3 mm for both the male and female. Description: The lip region is hemispherical, divided bilateral, dorsal, and ventral with grooves into four main lobes (two subdorsal and two subventral) each bearing six or more horizontal striations; two smaller lobes (lateral) with amphid apertures.
The male has winglike folds around its tail, and the female has a short, rounded tail. [1] Some species are amphimictic, with male and female individuals that reproduce sexually, while others are parthenogenetic, with females producing offspring without fertilization. [2] The genus includes ectoparasites, endoparasites, and semi-endoparasites. [2]
The pine wilt nematode has a typical nematode life cycle, with four juvenile stages and an adult stage with both male and female individuals that reproduce sexually. The mycophagous phase of the life cycle takes place in dead or dying wood, where the nematodes live and feed upon fungi, rather than the wood itself. The nematode cannot travel ...
Radopholus similis is a species of nematode known commonly as the burrowing nematode. [1] It is a parasite of plants, and it is a pest of many agricultural crops. It is an especially important pest of bananas , and it can be found on coconut , avocado , coffee , sugarcane , other grasses , and ornamentals .
The nematodes body is slightly curved when relaxed. [4] [5] Females have two ovaries which overlap the spermatheca. The vulva is found near the center of the body and the rectum near the tip of the tail. Males are smaller than the female, have an arcuate spicules, gubernaculum with titillate and a broad striated bursa. [5]
Once he recognizes a hermaphrodite worm, the male nematode begins tracing the hermaphrodite with his tail until he reaches the vulval region. The male then probes the region with his spicules to locate the vulva, inserts them, and releases sperm. [27] The sperm of C. elegans is amoeboid, lacking flagella and acrosomes. [28]
This is a very large nematode, the male about 4 to 6 centimetres long [1] and the female known to exceed 20 centimetres. [3] The size is unusual for entomopathogenic nematodes, which are generally almost microscopic. [2]