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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11246

Title: Morphogenesis of Kiitricha marina Nozawa, 1941 (Ciliophora, Spirotrichea), a possible model for the ancestor of hypotrichs s. L.
Authors: AL-Rasheid, K. A. S.
Song, W.,
Shao, C
Keywords: Ontogenesis;
Phylogeny;Spirotrichea;
Systematics
Marine ciliate
تاريخ النشر: 2009
Publisher: European Journal of Protistology. GERMANY
Citation: . 45: 292–304.
Abstract: Recent studiessuggestedthatthemarineciliate Kiitricha Nozawa, 1941representsabasalbranchinthespirotrichs. The presentstudyreflectsthemorphogeneticalinvestigationof Kiitricha marina Nozawa,1941.Theresultslistedbelow show anextremelyunusualdevelopmentalpatterncomparedwithallotherknownformsintheclassSpirotricheaor hypotrichss.l. (i) Thedifferentiationoftheciliarystructuresfromtheprimordiaoccursaftercelldivision.Thismakes Kiitricha marina Nozawa,1941uniqueamonghypotrichss.l. (ii) Sincetheanlageoftheundulatingmembranesintheopisthederivesfromthedivisionofthededifferentiated parentalstructureandthusisnotformedindependently, Kiitrichamarina Nozawa,1941isalsouniqueamong spirotrichs. (iii) Mostsomaticcirralstructuresappearinapost-anlagepattern,i.e.allcirriexhibitaprimaryarrangementinthe sense thattheyaredistributedasthoughtheyhadjustbeensegregatedfromtheanlagen. (iv) Unlikemostotherknownhypotrichss.l.,theundulatingmembrane-anlagedoesnotcontributeafrontalcirrus. (v) Thedorsalkinetiesareformedintwoways:(a)fromtheposteriorportionofthecirralanlagenwhichlater generatethenewdorsalkinetysegments;and(b)bytheirregularproliferationofdikinetidsinthelongdorsal kineties. (vi) Allcirralanlagenareformedintrakinetallyfromthededifferentiatedparentalcirrianddevelopinaprimary mode. Takencollectively,thesefindingssuggestthat Kiitricha is abasalbranchinghypotrichandthereforea possiblemodelfortheancestorofthehypotrichss.l. & 2008 ElsevierGmbH.Allrightsreserved.
URI: http://hdl.handle.net/123456789/11246
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