The opalinid ciliate infusorians

Metcalf, Maynard M.

doi:10.5479/si.03629236.120.1

Cited by 66 publications

(226 citation statements)

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“…The number of chromosomes, as listed by Metcalf (1923) in his descriptions of new species, has been discarded as a taxonomic criterion since, as pointed out by Chen (1948), nucleoli have in the past been mistaken for chromosomes.…”

Section: Introductionmentioning

confidence: 99%

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Opalinidae (Sarcomastigophora) in North American Amphibia. GenusProtoopalina Metcalf, 1918

1995

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During 1992, 83 specimens of North American Amphibia from Algonquin Park and Kingston, Ontario, Canada, and from El Paso County, Texas USA, comprising 14 species in seven families, were checked for opalinids in the cloaca. Protoopalina allisteri n. sp. is described from one Gastrophryne carolinensis (Microhylidae) from Arkansas and P. mitotica was found in one of four Scaphiopus multiplicatus (Pelobatidae) from Texas. The North American species of Protoopalina are reviewed. Zelleriella ovoidea (Metcalf, 1923) is proposed as a new combination for P. ovoidea.

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Section: Introductionmentioning

confidence: 99%

“…The North American species of Protoopalina are reviewed. Zelleriella ovoidea (Metcalf, 1923) is proposed as a new combination for P. ovoidea.…”

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confidence: 99%

Opalinidae (Sarcomastigophora) in North American Amphibia. GenusProtoopalina Metcalf, 1918

1995

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“…The opalinids have long been one of the controversial protists with respect to their systematic position (CavalierSmith, 1993;Corliss, 1955Corliss, , 1994Margulis and Schwartz, 1982;Metcalf, 1923;Patterson, 1985;Sandon, 1976). At present, no information as to molecular phylogeny of the opalinids is available.…”

Section: Introductionmentioning

confidence: 99%

Binary Fission and Encystation of Opalina sp. in Axenic Medium

Hanamura

Endoh

2001

Zoological Science

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“…Corliss (7) summarizes arguments concerning classification and agrees that a near-fagellate position is reasonable, while Ulrich (27) gives them separate status equivalent to his Flagellata, Rhizopoda, and so on. Metcalf (19,20) has been the most active spokesman for a pro-ciliate point of view. A detailed light microscope study of the species considered in the present report was made by Cosgrove (8).…”

Section: Introductionmentioning

confidence: 99%

An Electron Microscope Study of Cortical Structures of Opalina Obtrigonoidea

Pitelka

1956

The Journal of Cell Biology

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The pellicular framework of Opalina obtrigonoidea consists of numerous longitudinal ribs parallel to the kineties. These ribs lie erect on the cell surface, and each is composed of striated longitudinal fibers. A membrane covers the ribs and the ectoplasm between them. Flagella, of conventional structure, emerge from the ectoplasm between the ribs. The two central fibers of each flagellum end at the cell surface; the nine peripheral fibers continue for about 400 mµ into the cell to form an open tubular kinetosome. From the anterolateral curvature of each kinetosome arise two rows of fibrils, each fibril oriented perpendicular to the cell surface and about 150 A in diameter. The two rows converge anteriorly and probably meet the next adjacent kinetosome. Minute granules or tubules, arranged in oblique rows and at least sometimes accompanied by very fine fibers, lie at the surface of the ectoplasm but show no detectable connection with the kinetosomes. The whole flagellar apparatus of Opalina thus bears a general resemblance to the infraciliature of some holotrich ciliates, but the degree of evolutionary relationship between them remains uncertain.

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The opalinid ciliate infusorians

Cited by 66 publications

References 1 publication

Opalinidae (Sarcomastigophora) in North American Amphibia. GenusProtoopalina Metcalf, 1918

Opalinidae (Sarcomastigophora) in North American Amphibia. GenusProtoopalina Metcalf, 1918

Binary Fission and Encystation of Opalina sp. in Axenic Medium

An Electron Microscope Study of Cortical Structures of Opalina Obtrigonoidea

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