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Oncicola
''Oncicola'' is a genus of parasitic worms belonging to the family Oligacanthorhynchidae. ''Oncicola'' belongs to the phylum Acanthocephalans that include many thorny-headed worms. This family contains 12 genera including the genus ''Oncicola''. ''Oncicola'' is a part of the phylum Acanthocephalans that include many thorny-headed worms. The name comes from the prefix onc- meaning “barbed” and -cola meaning “to inhabit” in Latin. It was named and discovered in 1916 by Travassos. These worms are defined by their parasitic nature which involves hook structures found at their front end. Taxonomy Phylogenetic analysis has been conducted on one of the species in the genus, ''O. venezuelensis''. Description Each worm is around 8–15 mm long with males typically being smaller than the females. They are typically white to yellow in color and globular shaped. They have a short proboscis at the front of the body with around 36 small hooks that vary in shape and size. Thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Pachysentis Canicola
''Pachysentis'' is a genus in Acanthocephala (thorny-headed worms, also known as spiny-headed worms) that parasitize primates and carnivorans. They are distributed across Africa, the Middle East, and the Americas. ''Pachysentis'' species attach themselves to the inner lining of the gastrointestinal tract of their hosts 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 the Egyptian cobra, and an adult stage where cystacanths mature in the intestines of the host. This genus appears identical to the closely related '' Oncicola'' apart from a greater number of hooks on the proboscis. There are eleven species assigned to this genus, although ''P. septemserialis'' is of uncertain taxonomic status. The female worms range from long and wide in ''P. lauroi'' to long and wide in ''P. dollfusi''. Virtually all of the length is the trunk, with a short proboscis. There is pronounced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Ameri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gigantorhynchida
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 which are used to temporarily close the posterior end of the female after copulation. There is pronounced sexual dimorphism with the female often two or more times longer than the male. *'' Intraprob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 can c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archiacanthocephala
Archiacanthocephala is a class within the phylum of Acanthocephala. They are 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 phylogenetic analyses thus far due to insufficiency of morphological data. However, the lack of features such as an absence of a muscle plate, a midventral longitudinal muscle, lateral receptacle flexors, and an apical sensory organ when compared to the other three orders o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iran
Iran, officially the Islamic Republic of Iran, and also called Persia, is a country located in Western Asia. It is bordered by Iraq and Turkey to the west, by Azerbaijan and Armenia to the northwest, by the Caspian Sea and Turkmenistan to the north, by Afghanistan and Pakistan to the east, and by the Gulf of Oman and the Persian Gulf to the south. It covers an area of , making it the 17th-largest country. Iran has a population of 86 million, making it the 17th-most populous country in the world, and the second-largest in the Middle East. Its largest cities, in descending order, are the capital Tehran, Mashhad, Isfahan, Karaj, Shiraz, and Tabriz. The country is home to one of the world's oldest civilizations, beginning with the formation of the Elamite kingdoms in the fourth millennium BC. It was first unified by the Medes, an ancient Iranian people, in the seventh century BC, and reached its territorial height in the sixth century BC, when Cyrus the Gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
