Congruence and indifference between two molecular markers for understanding oral evolution in the Marynidae sensu lato (Ciliophora, Colpodea).
Bottom Line: Our understanding of the evolution of oral structures within the Colpodida is confounded by the low number of morphological characters that can be used in constructing hypotheses, and by the low taxon and character sampling in molecular phylogenetic analyses designed to assess these hypotheses.We show that the inferred mitochondrial and nuclear SSU-rDNA trees, as well as concatenated and constrained analyses, are congruent in not recovering a monophyletic Marynidae.However, due to low node support, the trees are indifferent to whether the morphological characters used to unite the Marynidae are the result of retention of ancestral states or convergence.
Affiliation: Department of Ecology, University of Kaiserslautern, Germany. firstname.lastname@example.orgShow MeSH
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Mentions: As with the single gene trees described above, the inferred ML and Bayesian topologies from the concatenated alignment of 2506 sites were identical for moderately to well-supported nodes (Fig. 3). Nodes in this tree are congruent with those moderately to highly supported nodes in a previously published concatenated topology (Dunthorn et al. 2011). The Marynidae s.l. are not monophyletic, although, as above, there is little confidence in this as none of the intervening nodes are moderately to fully supported. Ilsiella branches in a position similar to the nSSU-rDNA tree.
Affiliation: Department of Ecology, University of Kaiserslautern, Germany. email@example.com