Acanthocephalus dirus | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Acanthocephala |
Class: | Palaeacanthocephala |
Order: | Echinorhynchida |
Family: | Echinorhynchidae |
Genus: | Acanthocephalus |
Species: | A. dirus |
Binomial name | |
Acanthocephalus dirus (Van Cleve, 1931) [1] | |
Synonyms [2] | |
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Acanthocephalus dirus is a species of parasitic worm in the Echinorhynchidae family. [2] Instead of having its eggs expelled from the host in feces, the gravid female detaches itself from the host's digestive tract and sinks to the bottom, where her body is consumed by the species' intermediate host, Caecidotea intermedius , a species of isopod. [3] [4] Upon hatching, the larvae begin to alter their host's behavior. This will manifest in lighter pigmentation and an increased attraction to predators, such as A. dirus' primary hosts. [5] [6]
Acanthocephalus dirus is commonly found parasitizing the following species of fish: [7]
The Bitterroot River is a northward flowing 84-mile (135 km) river running through the Bitterroot Valley, from the confluence of its West and East forks near Conner in southern Ravalli County to its confluence with the Clark Fork River near Missoula in Missoula County, in western Montana. The Clark Fork River is a tributary to the Columbia River and ultimately, the Pacific Ocean. The Bitterroot River is a Blue Ribbon trout fishery with a healthy population of native westslope cutthroat trout and bull trout. It is the third most fly fished river in Montana behind the Madison and Big Horn Rivers.
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Fessisentis is a genus of parasitic spiny-headed worms. It is the only genus in the family Fessisentidae. This genus contains six species that are distributed across the Eastern continental United States as far west as Oklahoma and Wisconsin. These worms parasitize salamanders and fish.
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Acanthocephalus anguillae is a species of parasitic worm in the phylum Acanthocephala. An intestinal parasite, it is found both in the Baltic Sea and along the coast of California, where it is often found in the fore- and mid-gut of the Brown and Rainbow trouts.
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