Gigantorhynchidae
Gigantorhynchida is an order containing a single family, Gigantorhynchidae of parasitic worms that attach themselves to the intestinal wall of terrestrial vertebrates. Gigantorhynchida contains the following three genera: *'' Gigantorhynchus'' Hamann, 1892 :The genus ''Gigantorhynchus'' is characterized by the presence of a cylindrical proboscis with a crown of robust hooks at the apex followed by numerous small hooks on the rest of the proboscis. The body, or trunk, is long with pseudosegmentation, the lemnisci are filiform, and the testes are ellipsoid. Species of ''Gigantorhynchus'' are distinguished based on the number and size of hooks on the crown of the proboscis, the type of pseudosegmentation, and size of the ellipsoid eggs. Males of all species possess eight cement glands Cement glands are small organs found in Acanthocephala that are used to temporarily close the posterior end of the female after copulation. Cement glands are also mucus-secreting organs that ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Mediorhynchus
''Mediorhynchus'' is a genus of small parasitic spiny-headed (or thorny-headed) worms. Phylogenetic analysis has been conducted on two known species of ''Mediorhynchus'' and confirmed the placement along with the related genus Gigantorhynchus in the family Gigantorhynchida. The distinguishing features of this order among archiacanthocephalans is a divided proboscis (specifically, the presence of a "teloboscis" which is the posterior third of a proboscis). This genus contains fifty-eight species that are distributed globally. These worms exclusively parasitize birds by attaching themselves around the cloaca using their hook-covered proboscis. The bird hosts are of different orders. Taxonomy and description ''Mediorhynchus'' is monophyletic based on phylogenetic analysis. Species can be identified primarily morphologically by the arrangement of hooks of the proboscis. The presence of a divided proboscis (specifically, the presence of a "teloboscis" which is the posterior third o ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Gigantorhynchus
''Gigantorhynchus'' is a genus of Acanthocephala (thorny-headed worms, also known as spiny-headed worms) that parasitize marsupials, anteaters, and possibly baboons by attaching themselves to the intestines using their hook-covered proboscis. Their life cycle includes an egg stage found in host feces, a cystacanth (larval) stage in an intermediate host such as termites, and an adult stage where cystacanths mature in the intestines of the host. This genus is characterized by a cylindrical proboscis with a crown of robust hooks at the apex followed by numerous small hooks on the rest of the proboscis, a long body with pseudosegmentation, filiform lemnisci, and ellipsoid testes. The largest known specimen is the female ''G. ortizi'' with a length of around and a width of . Genetic analysis on one species of ''Gigantorhynchus'' places it with the related genus ''Mediorhynchus'' in the family Gigantorhynchidae. Six species in this genus are distributed across Central and South Ameri ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Gigantorhynchus Echinodiscus
''Gigantorhynchus'' is a genus of Acanthocephala (thorny-headed worms, also known as spiny-headed worms) that parasitize marsupials, anteaters, and possibly baboons by attaching themselves to the intestines using their hook-covered proboscis. Their life cycle includes an egg stage found in host feces, a cystacanth (larval) stage in an intermediate host such as termites, and an adult stage where cystacanths mature in the intestines of the host. This genus is characterized by a cylindrical proboscis with a crown of robust hooks at the apex followed by numerous small hooks on the rest of the proboscis, a long body with pseudosegmentation, filiform lemnisci, and ellipsoid testes. The largest known specimen is the female ''G. ortizi'' with a length of around and a width of . Genetic analysis on one species of ''Gigantorhynchus'' places it with the related genus ''Mediorhynchus'' in the family Gigantorhynchidae. Six species in this genus are distributed across Central and South Amer ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Moniliformidae
Moniliformidae is a family of parasitic spiny-headed (or thorny-headed) worms. It is the only family in the Moniliformida order and contains three genera: ''Australiformis'' containing a single species, ''Moniliformis'' containing eighteen species and ''Promoniliformis'' containing a single species. Genetic analysis have determined that the clade is monophyletic despite being distributed globally. These worms primarily parasitize mammals, including humans in the case of ''Moniliformis moniliformis'', and occasionally birds by attaching themselves into the intestinal wall using their hook-covered proboscis. The intermediate hosts are mostly cockroaches. The distinguishing features of this order among archiacanthocephalans is the presence of a cylindrical proboscis with long rows of hooks with posteriorly directed roots and proboscis retractor muscles that pierce both the posterior and ventral end or just posterior end of the receptacle. Infestation with Monoliformida species ca ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Parasitic Worm
Parasitic worms, also known as helminths, are large Parasitism#Basic concepts, macroparasites; adults can generally be seen with the naked eye. Many are intestinal worms that are soil-transmitted helminth, soil-transmitted and intestinal parasite infection, infect the gastrointestinal tract. Other parasitic worms such as schistosomes reside in blood vessels. Some parasitic worms, including leeches and monogeneans, are ectoparasites thus, they are not classified as helminths, which are Parasitism#Basic concepts, endoparasites. Parasitic worms live in and feed in living host (biology), hosts. They receive nourishment and protection while disrupting their hosts' ability to absorb nutrients. This can cause weakness and disease in the host, and poses a global health and economic problem. Parasitic worms cannot reproduce entirely within their host's body; they have a life cycle that includes some stages that need to take place outside of the host. Helminths are able to survive in the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Moniliformis Moniliformis
''Moniliformis moniliformis'' is a parasite of the Acanthocephala phylum in the family Moniliformidae. The adult worms are usually found in intestines of rodents or carnivores such as cats and dogs. The species can also infest humans, though this is rare. Distribution Infested rats have been found world-wide. Cases of human infestation by ''Moniliformis moniliformis'' have been reported in the United States, Iran, Iraq, and Nigeria.]" target="_blank" class="mw-redirect" title=""> "Acanthocephalan Worms." Gideon. Gideon Informatics. Web. Morphology Acanthocephalans do not have s and absorb nutrients through the[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Nephridiacanthus Major
Oligacanthorhynchida is an order containing a single parasitic worm family, Oligacanthorhynchidae, that attach themselves to the intestinal wall of terrestrial vertebrates. Taxonomy and description Species ''Oligacanthorhynchida'' contains twelve genera and numerous species. Cucullanorhynchus The genus ''Cucullanorhynchus'' Amin, Ha and Heckmann, 2008 is named for the anterior hood. It was described in 2008 based on samples collected from the intestines of mammals between 1998 and 2004 in Vietnam. *''Cucullanorhynchus constrictruncatus'' Amin, Ha and Heckmann, 2008 ''C. constrictruncatus'' is the only species in the genus ''Cucullanorhynchus''. It has been found in the intestine of the leopard (''Panthera pardus'') in Vietnam. The trunk has an anterior hood in both sexes and a posterior constriction in females. The species name derives from this constriction near the posterior end of females. Heptamegacanthus The genus ''Heptamegacanthus'' Spencer-Jones, 1990 contains 1 sp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Oligacanthorhynchus Tortuosa
Oligacanthorhynchida is an order containing a single parasitic worm family, Oligacanthorhynchidae, that attach themselves to the intestinal wall of terrestrial vertebrates. Taxonomy and description Species ''Oligacanthorhynchida'' contains twelve genera and numerous species. Cucullanorhynchus The genus ''Cucullanorhynchus'' Amin, Ha and Heckmann, 2008 is named for the anterior hood. It was described in 2008 based on samples collected from the intestines of mammals between 1998 and 2004 in Vietnam. *''Cucullanorhynchus constrictruncatus'' Amin, Ha and Heckmann, 2008 ''C. constrictruncatus'' is the only species in the genus ''Cucullanorhynchus''. It has been found in the intestine of the leopard (''Panthera pardus'') in Vietnam. The trunk has an anterior hood in both sexes and a posterior constriction in females. The species name derives from this constriction near the posterior end of females. Heptamegacanthus The genus ''Heptamegacanthus'' Spencer-Jones, 1990 contains 1 sp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Oncicola Venezuelensis
Oligacanthorhynchida is an order containing a single parasitic worm family, Oligacanthorhynchidae, that attach themselves to the intestinal wall of terrestrial vertebrates. Taxonomy and description Species ''Oligacanthorhynchida'' contains twelve genera and numerous species. Cucullanorhynchus The genus ''Cucullanorhynchus'' Amin, Ha and Heckmann, 2008 is named for the anterior hood. It was described in 2008 based on samples collected from the intestines of mammals between 1998 and 2004 in Vietnam. *''Cucullanorhynchus constrictruncatus'' Amin, Ha and Heckmann, 2008 ''C. constrictruncatus'' is the only species in the genus ''Cucullanorhynchus''. It has been found in the intestine of the leopard (''Panthera pardus'') in Vietnam. The trunk has an anterior hood in both sexes and a posterior constriction in females. The species name derives from this constriction near the posterior end of females. Heptamegacanthus The genus ''Heptamegacanthus'' Spencer-Jones, 1990 contains 1 sp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Macracanthorhynchus Ingens
Oligacanthorhynchida is an order containing a single parasitic worm family, Oligacanthorhynchidae, that attach themselves to the intestinal wall of terrestrial vertebrates. Taxonomy and description Species ''Oligacanthorhynchida'' contains twelve genera and numerous species. Cucullanorhynchus The genus ''Cucullanorhynchus'' Amin, Ha and Heckmann, 2008 is named for the anterior hood. It was described in 2008 based on samples collected from the intestines of mammals between 1998 and 2004 in Vietnam. *''Cucullanorhynchus constrictruncatus'' Amin, Ha and Heckmann, 2008 ''C. constrictruncatus'' is the only species in the genus ''Cucullanorhynchus''. It has been found in the intestine of the leopard (''Panthera pardus'') in Vietnam. The trunk has an anterior hood in both sexes and a posterior constriction in females. The species name derives from this constriction near the posterior end of females. Heptamegacanthus The genus ''Heptamegacanthus'' Spencer-Jones, 1990 contains 1 sp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Oligacanthorhynchidae
Oligacanthorhynchida is an order containing a single parasitic worm family, Oligacanthorhynchidae, that attach themselves to the intestinal wall of terrestrial vertebrates. Taxonomy and description Species ''Oligacanthorhynchida'' contains twelve genera and numerous species. Cucullanorhynchus The genus ''Cucullanorhynchus'' Amin, Ha and Heckmann, 2008 is named for the anterior hood. It was described in 2008 based on samples collected from the intestines of mammals between 1998 and 2004 in Vietnam. *''Cucullanorhynchus constrictruncatus'' Amin, Ha and Heckmann, 2008 ''C. constrictruncatus'' is the only species in the genus ''Cucullanorhynchus''. It has been found in the intestine of the leopard (''Panthera pardus'') in Vietnam. The trunk has an anterior hood in both sexes and a posterior constriction in females. The species name derives from this constriction near the posterior end of females. Heptamegacanthus The genus ''Heptamegacanthus'' Spencer-Jones, 1990 contains 1 sp ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Archiacanthocephala
Archiacanthocephala is a class within the phylum of Acanthocephala Acanthocephala (Greek , ', thorn + , ', head) is a phylum of parasitic worms known as acanthocephalans, thorny-headed worms, or spiny-headed worms, characterized by the presence of an eversible proboscis, armed with spines, which it uses to p .... They are Parasitic worm, parasitic worms that attach themselves to the intestinal wall of terrestrial vertebrates, including humans. They are characterised by the body wall and the lemnisci (which are a bundle of sensory nerve fibers), which have nuclei that divide without spindle formation, or the appearance of chromosomes, or it has a few amoebae-like giant nuclei. Typically, there are eight separate cement glands in the male, which is one of the few ways to distinguish the dorsal and ventral sides of these organisms. Taxonomy Genetic data are not available for the genus ''Apororhynchus'' in public databases, and ''Apororhynchus'' has not been included in Phyloge ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |