Abstract:
:The authors present light and electron microscopical data on a myxosporidian found in the gills of Crenicichla lepidota Heckel, 1840 (Teleostei, Cichlidae) from the Amazon river. Based on the spore morphology, it is concluded that this species belongs to the family Myxobolidae, genus Henneguya, and that it constitutes a new species: Henneguya amazonica n.sp. The fine structure of sporogenesis shows that the development follows, in general, the pattern of this and other genera. Nevertheless, some ultrastructural features are reported for the first time in the genus Henneguya: intercellular bridges between daughter generative cells as well as tubuli arranged in aggregates and dispersed within the capsular matrix. The structure of the trophozoite wall suggests that the species is not highly pathogenic, but, to ascertain the true pathogenicity of the species, further studies are needed.
journal_name
Eur J Protistoljournal_title
European journal of protistologyauthors
Rocha E,Matos E,Azevedo Cdoi
10.1016/S0932-4739(11)80233-6subject
Has Abstractpub_date
1992-08-21 00:00:00pages
273-8issue
3eissn
0932-4739issn
1618-0429pii
S0932-4739(11)80233-6journal_volume
28pub_type
杂志文章abstract::The apostome ciliate Hyalophysa chattoni, a symbiont of the estuarine grass shrimp Palaemonetes pugio, was tested for its growth and reproductive ability in a wide range of salinities from 0.1 to 55 ppt. Shrimp, with their attached ciliates, were slowly acclimated to different salinities in order to assess protozoan c...
journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
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abstract::A strain of the free-living flagellate Dimastigella trypaniformis Sandon was isolated from the gut contents of the Australian termite Mastotermes darwiniensis Froggatt. The fine structure of the isolate (Ulm strain) was compared with a strain isolated from soil in Scotland (Glasgow strain). The biflagellated trophozoi...
journal_title:European journal of protistology
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journal_title:European journal of protistology
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journal_title:European journal of protistology
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journal_title:European journal of protistology
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
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abstract::Since its description 35 years ago from Quebec, Canada, the poorly known monospecific testate rhizopod genus Puytoracia (type species, Puytoracia bergeri) has been reported only from the Himalayan region of Nepal. This species was recently found at 13 locations in Ontario, Canada, and the range of form variation of th...
journal_title:European journal of protistology
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abstract::Two new marine scuticociliates, Sathrophilus planus n. sp. and Pseudoplatynematum dengi n. sp., isolated from coastal waters of Qingdao, northern China, were investigated using live observation and silver impregnations. Sathrophilus planus can be recognized by its elongate and conspicuously flattened body, ca. 16 soma...
journal_title:European journal of protistology
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abstract::Dileptid and tracheliid ciliates have been traditionally classified within the subclass Haptoria of the class Litostomatea. However, their phylogenetic position among haptorians has been controversial and indicated that they may play a key role in understanding litostomatean evolution. In order to reconstruct the evol...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2011.04.006
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abstract::Neoparamoeba perurans is the aetiological agent of amoebic gill disease (AGD) in salmonids, however multiple other amoeba species colonise the gills and their role in AGD is unknown. Taxonomic assessments of these accompanying amoebae on AGD-affected salmon have previously been based on gross morphology alone. The aim...
journal_title:European journal of protistology
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abstract::For many years, the genus Massisteria (Cercozoa, Leucodictyida) comprised only one species, M. marina. This small species has a biphasic life cycle and feeds through filose, radiating pseudopodia. It has a distinct swimming form and is regularly detected in association with detritus aggregates. However, environmental ...
journal_title:European journal of protistology
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abstract::The living morphology, infraciliature and morphogenesis of a new ciliate, Urosomoida paragiliformis n. sp., collected from saline soil in Weinan, China, were studied in vivo and after protargol staining. Urosomoida paragiliformis n. sp. is characterized as follows: body elongate-elliptical with no tail, flexible and s...
journal_title:European journal of protistology
pub_type: 杂志文章,评审
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abstract::Expression of surface antigens is usually mutually exclusive, meaning that only one protein is present on the cell surface. With the RNAi feeding technology we induce serotype shifts in Paramecium tetraurelia which are demonstrated to be incomplete, meaning that the cells remain in a shifting state. The coexpression o...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2005.09.003
更新日期:2006-03-01 00:00:00
abstract::The morphology and infraciliature of two Frontonia species, F. shii spec. nov. and F. paramagna Chen et al., 2014, isolated from a freshwater pond in northeastern China, were investigated using living observation and silver staining methods Frontonia shii spec. nov. is recognized by the combination of the following ch...
journal_title:European journal of protistology
pub_type: 杂志文章
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abstract::Noctiluca scintillans (Macartney) Kofoid et Swezy, 1921 is an unarmoured heterotrophic dinoflagellate with a global distribution, and has been considered as one of the ancestral taxa among dinoflagellates. Recently, 18S rDNA, actin, alpha-, beta-tubulin, and Hsp90-based phylogenies have shown the basal position of the...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2009.11.001
更新日期:2010-05-01 00:00:00
abstract::It is well established that in ombrotrophic bogs, water-table depth (WTD) is the primary environmental control on testate amoeba distribution. However, the environmental controls on testate amoebae in minerotrophic fens are less well known and successional change in their assemblages associated with fen-bog peatland d...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2018.07.003
更新日期:2018-10-01 00:00:00