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Cochlosoma
Cochlosoma is a genus of flagellated protozoa in the order Trichomonadida created by A. Kotlán (1923). Some of their typical features include a prominent adhesive disc, axostyle, costa, and six flagella – one of which is attached to an undulating membrane that runs laterally along the body.
Cochlosoma species are parasites found in the intestines of birds and mammals. They are known to cause runting and enteritis in young turkey and ducks.
The genus currently contains five species, the most notable member being C. anatis, a parasite of ducks and turkeys.
Cochlosoma was first described by Kotlán (1923) to include C. anatis, a flagellate he found in the intestines of young European domestic ducks (Anas platyrhynchos) suffering from coccidiosis. Cochlosoma rostratum was identified in North American domestic ducks by Kimura in 1934, although this species is now recognized as a synonym of C.anatis.
Kimura was the first to describe the morphology of Cochlosoma in great detail. A second species was described under the name Cyanthosoma striatum (Tyzzer, 1930) and was reassigned as Cochlosoma striatum by Kulda and Nohýnková (1978). In 1938, Bernard V. Travis described two new species of Cochlosoma, C. picae and C. turdi. The most recent addition to genus Cochlosoma is C. soricis, which was found in shrews by Watkins et al. (1989).
Cochlosoma was originally proposed to be part of diplomonads because their prominent adhesive disc is similar to that of Giardia. In 1952, Grassé placed the genus into the order Retortamonadida. However, morphological and ultrastructural observations (i.e. parabasal apparatus, pelta, costa, and axostyle) suggest the genus is more likely related to trichomonads and in 1996, Pecka et al. moved Cochlosoma to order Trichomonadida. More recently,[when?] analysis of their rRNA gene sequence further supported their placement in Trichomonadida and led to their transfer from family Cochlosomatidae to family Trichomonadidae.
Cochlosoma species are parasitic and commonly found in the cloaca, large intestine, and ceca. The following are some species and their known hosts:
Cochlosoma species have asymmetrical ovoidal shaped bodies (6-18 μm) that are broader anteriorly and narrower posteriorly. Their anterior end is truncated by a spiraled adhesive disc that is used to attach to the intestinal mucosa of the host. A lateral groove develops along the side of the body from the disc.
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Cochlosoma
Cochlosoma is a genus of flagellated protozoa in the order Trichomonadida created by A. Kotlán (1923). Some of their typical features include a prominent adhesive disc, axostyle, costa, and six flagella – one of which is attached to an undulating membrane that runs laterally along the body.
Cochlosoma species are parasites found in the intestines of birds and mammals. They are known to cause runting and enteritis in young turkey and ducks.
The genus currently contains five species, the most notable member being C. anatis, a parasite of ducks and turkeys.
Cochlosoma was first described by Kotlán (1923) to include C. anatis, a flagellate he found in the intestines of young European domestic ducks (Anas platyrhynchos) suffering from coccidiosis. Cochlosoma rostratum was identified in North American domestic ducks by Kimura in 1934, although this species is now recognized as a synonym of C.anatis.
Kimura was the first to describe the morphology of Cochlosoma in great detail. A second species was described under the name Cyanthosoma striatum (Tyzzer, 1930) and was reassigned as Cochlosoma striatum by Kulda and Nohýnková (1978). In 1938, Bernard V. Travis described two new species of Cochlosoma, C. picae and C. turdi. The most recent addition to genus Cochlosoma is C. soricis, which was found in shrews by Watkins et al. (1989).
Cochlosoma was originally proposed to be part of diplomonads because their prominent adhesive disc is similar to that of Giardia. In 1952, Grassé placed the genus into the order Retortamonadida. However, morphological and ultrastructural observations (i.e. parabasal apparatus, pelta, costa, and axostyle) suggest the genus is more likely related to trichomonads and in 1996, Pecka et al. moved Cochlosoma to order Trichomonadida. More recently,[when?] analysis of their rRNA gene sequence further supported their placement in Trichomonadida and led to their transfer from family Cochlosomatidae to family Trichomonadidae.
Cochlosoma species are parasitic and commonly found in the cloaca, large intestine, and ceca. The following are some species and their known hosts:
Cochlosoma species have asymmetrical ovoidal shaped bodies (6-18 μm) that are broader anteriorly and narrower posteriorly. Their anterior end is truncated by a spiraled adhesive disc that is used to attach to the intestinal mucosa of the host. A lateral groove develops along the side of the body from the disc.