Relative warps meet cladistics: A contribution to the phylogenetic relationships ofbaleen whales based on landmark analyses of mysticete crania

Bulletin of geosciences

Hampe O Baszio S¹ 

关键词: Mysticeti;    morphometry;    landmark analysis;    relativewarps;    relationships;    phylogeny;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

Duringthelastfewyearsresearchonfossilbaleenwhalesexperiencedarenaissance.Severalimportantfossilsweredescribed,andnewandextendedcladisticanalyseswereperformed,partlyincludingmoleculardatafromlivingspecies.Despitetheprogressinourknowledgeoftheirphylogeny,manyquestionshavestillnotbeenresolved.Adifferentattempttoillustratemysticeterelationshipsispresentedhereusinglandmarkanalyses.Forthepresentanalysis,38dorsalviewsofmysticeteskullsandskullreconstructionswerescannedandthirteenlandmarksweredefined.Themethodusedistherelativewarpanalysis.Thismethodallowsaclusteringofelementsaccordingtotheirsimilarityinshape.Thecalculatedrelativewarpsexplainmainshapevariationsinthesample.Asinparsimonyanalysesthetoothedmysticetesareclearlydistinguishable.RepresentativesoftheAetocetoideaaregroupedverycloselytogetherandthereforetheirclassificationinthisfamilyisstronglysupported.TheperformedanalysisshowsthatthecraniaoftheBalaenidaehavedevelopedsimilaritiestothecraniumofJanjucetushunderi.TherestrictionoftheCetotheriidaetoasmallgroupoftaxaisconfirmedhereandincludesinthisanalysisCetotherium,Mixocetus,Piscobalaena,andTitanocetuswithacloserelationshiptothelivinggraywhale.Thestem-balaenopteridsdonotshowanyclearsignalsinthepresentanalysis.Thereisnosupportforasubdivisionintofurtherfamilies.ThestructureofthedorsalcraniumofProtororqualusandPraemegapteraisverysimilartothatofBalaenoptera

【 授权许可】

Unknown