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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11260

Title: Two vicariant Semispathidium species from tropical Africa and central Europe: S. fraterculum nov. spec.and S. pulchrum nov. spec. (Ciliophora, Haptorida).
Authors: Foissner, W., Hess, S
AL-Rasheid, K. A. S.
Keywords: Biodiversity
Enchelyodon
Restingcysts;Soil;
Spathidium;
Vicariantspeciationmodel
Issue Date: 2010
Publisher: European Journal of Protistology. GERMANY.
Citation: 46: 61-73.
Abstract: Using standardmethods,wedescribetwonew Semispathidium speciesfromsemiterrestrialhabitatsoftropical Africa andcentralEurope. Semispathidiumfraterculum nov. spec.and S. pulchrum nov. spec.differfromeachother and fromtwoNamibian(SouthwestAfrican)congenersbybodysize,theshapeandlocationoftheextrusomes;the shape ofthemacronucleus,thenumberofciliaryrows,thenumberofciliawithintherows,andthenumberof dikinetidscomprisingthedorsalbrushrows.Theglobularrestingcystof S. fraterculum is uniqueinhavingcountless granulesontheinsideoftheexternallayer,formingsharp-angledrows.Thedistributionoftheseandtwofurther,not yet describedsouthAfricanspeciesindicatesthatthegenus Semispathidium evolvedinsubtropicalAfrica. Semispathidiumfraterculum and S. pulchrum are highlysimilar,bothmorphologicallyandecologically,differingin mainlyoneimportantfeature:theshapeandlocationoftheextrusomesusedforpreycapture.Thissuggeststhatthey evolved fromacommonancestorwhosearealwasdividedbyavicariantevent,causinganindependentevolutionof the splitpopulations.Wearguethatthisandotherspeciespairsindicatethatthevicariancespeciationmodelis applicabletoprotists. & 2009ElsevierGmbH.Allrightsreserved.
URI: http://hdl.handle.net/123456789/11260
Appears in Collections:College of Science

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