A redescription of the marine hypotrichous ciliate, Nothoholosticha fasciola (Kahl,1932) nov. gen., nov. comb. (Ciliophora:Urostylida) with brief notes on its cellular reorganization and SS rRNA

Abstract

The morphologyandinfraciliatureofthemarinehypotrichousciliate Nothoholostichafasciola (Kahl, 1932)nov. gen.,nov.comb.,isolatedfrommariculturewatersnearQingdao,China,areredescribedbasedonliveandprotargol- impregnatedspecimens.Featuresreportedforthefirsttimeincludethepossessionofmorethan50macronuclear nodulesanddetailsoftheinfraciliature,i.e.5060adoralmembranelles,shortenedparoralandendoralmembranes,six frontal,onebuccalandtwotoseventransversecirri,ca.40pairsofmidventralcirri,ca.60–120leftand70–120right marginalcirri,threedorsalkineties,caudalandfrontoterminalcirriabsent.Inaddition,briefdetailsoftwostagesof cellularreorganizationin N. fasciola are suppliedandcomparisonswithsomerelatedurostylidsbasedonSSrRNA gene sequencedataarereported.Thenewgenus Nothoholosticha is establishedbasedprimarilyontheabsenceof frontoterminalcirri,whichdistinctlyseparatesitfromsimilarurostylidgenera.Anteholostichalongissima is transferred to Nothoholosticha as N. longissima (DragescoandDragesco-Kerne´is, 1986)nov.comb.and Holostichaantarctica is transferredto Pseudokeronopsis as P. antarctica (WilbertandSong,2008)nov.comb. r 2009 ElsevierGmbH.Allrightsreserved. Keywords: Infraciliature; Morphology; Nothoholosticha longissima nov. comb.; Nothoholosticha fasciola nov. gen.,nov.comb.; Pseudokeronopsis antarctica nov