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http://hdl.handle.net/123456789/11260
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| 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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