Phylogenetic relationships of Microdontinae (Diptera: Syrphidae) based on molecular and morphological characters

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Reemer , M & Ståhls , G 2013 , ' Phylogenetic relationships of Microdontinae (Diptera: Syrphidae) based on molecular and morphological characters ' , Systematic Entomology , vol. 38 , no. 4 , pp. 661-688 . https://doi.org/10.1111/syen.12020

Title: Phylogenetic relationships of Microdontinae (Diptera: Syrphidae) based on molecular and morphological characters
Author: Reemer, Menno; Ståhls, Gunilla
Contributor: University of Helsinki, Zoology
Date: 2013-10
Language: eng
Number of pages: 28
Belongs to series: Systematic Entomology
ISSN: 0307-6970
URI: http://hdl.handle.net/10138/232626
Abstract: The intrasubfamilial classification of Microdontinae Rondani (Diptera: Syrphidae) has been a challenge: until recently more than 300 out of more than 400 valid species names were classified in Microdon Meigen. We present phylogenetic analyses of molecular and morphological characters (both separate and combined) of Microdontinae. The morphological dataset contains 174 characters, scored for 189 taxa (9 outgroup), representing all 43 presently recognized genera and several subgenera and species groups. The molecular dataset, representing 90 ingroup species of 28 genera, comprises sequences of five partitions in total from the mitochondrial gene COI and the nuclear ribosomal genes 18S and 28S. We test the sister-group relationship of Spheginobaccha with the other Microdontinae, attempt to elucidate phylogenetic relationships within the Microdontinae and discuss uncertainties in the classification of Microdontinae. Trees based on molecular characters alone are poorly resolved, but combined data are better resolved. Support for many deeper nodes is low, and placement of such nodes differs between parsimony and Bayesian analyses. However, Spheginobaccha is recovered as highly supported sister group in both. Both analyses agree on the early branching of Mixogaster, Schizoceratomyia, Afromicrodon and Paramicrodon. The taxonomical rank in relation to the other Syrphidae is discussed briefly. An additional analysis based on morphological characters only, including all 189 taxa, used implied weighting. A range of weighting strengths (k-values) is applied, chosen such that values of character fit of the resulting trees are divided into regular intervals. Results of this analysis are used for discussing the phylogenetic relationships of genera unrepresented in the molecular dataset.
Subject: PIPUNCULIDAE DIPTERA
FLIES DIPTERA
CLASSIFICATION
ALIGNMENT
MAFFT
SEQUENCES
INFERENCE
MRBAYES
TREES
1181 Ecology, evolutionary biology
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