Effetto di Inibitori Microtubulari Sulla Coniugazione di Oxytricha Bifaria

Banchetti, Rosalba; Cetera, R.; Nobili, Renzo; Ricci, N.

doi:10.1080/11250007809440164

Cited by 2 publications

(2 citation statements)

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“…The freshwater, cannibalistic giant forming population identified as "Oxytricha bifaria" and studied extensively (Esposito and Ricci, 1975;Ricci et al, 1975bRicci et al, , 1980Ricci et al, , 1998Esposito et al, 1976;Banchetti et al, 1978Banchetti et al, , 1982Ricci, 1981Ricci, , 1982 is morphologically identical to the new species (Ricci et al, 1985;Banchetti and Ricci, 1986;Rosati et al, 1988). Rosati et al (1988) divided the specimens into normal and giant cells and both are smaller than the small and giant morphs of T. polymorpha n.…”

Section: Comparison Of Tetmemena Polymorpha N Sp With Related Taxamentioning

confidence: 99%

“…The Italian population was the subject of more than 60 investigations in the period from 1975 to 1998 as listed by Berger (1999). However, none of these studies dealt with the taxonomic assignment of the population (Esposito and Ricci, 1975;Ricci et al, 1975bRicci et al, , 1980Ricci et al, , 1998Esposito et al, 1976;Banchetti et al, 1978Banchetti et al, , 1982Ricci, 1981Ricci, , 1982. Later, Berger (1999) suggested classifying the Italian population into Tetmemena pustulata, but he required further detailed description before the final assignment.…”

Section: Introductionmentioning

confidence: 99%

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Polymorphism, gigantism, and cannibalism, one stylonychid ciliate (Ciliophora, Hypotricha) to rule them all

2023

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The morphology, ontogenesis, and molecular phylogeny of the polymorphic and cannibalistic giant forming Tetmemena polymorpha n. sp., found in a brackish water sample in South Korea, were investigated. The present species has long been misidentified as “Oxytricha bifaria.” The new investigation shows that the species produces three morphologically different morphs. The small morph is bacterivorous and characterized by its small body size and slim body and it is found only in the stationary and decline phases of the culture. The large morph has a wide body, larger oral apparatus, and feeds on small eukaryotes such as yeast cells and small ciliates. It divides very quickly and produces the other two morphs and found in the exponential phase of the cultures. The giant morph is characterized by its huge body and oral apparatus. It feeds on the small morph cells of the same species and other ciliates, and occurs together with the small morph. Phylogenetic analyses based on the 18S rRNA gene sequences show that the new species is placed in a sister subclade to that containing other Tetmemena sequences. Moreover, Tetmemena indica Bharti et al., 2019 nov. stat. is raised to species level based on the differences in the cyst morphology and the dorsal ciliature to the authoritative Tetmemena pustulata population.

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