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Phylogenetic Analysis Reveals Multiple Cases of Morphological Parallelism and Taxonomic Polyphyly in Lomatium (Apiaceae)

The genera Lomatium and Cymopterus, along with many others, form a group that has been referred to previously as the perennial endemic Apiaceae subfamily Apioideae of western North America. This group of ecologically important and widespread species has been the target of numerous systematic studies... Full description

Journal Title: Systematic botany 2014, Vol.39 (2), p.662-675
Main Author: George, Emma E
Other Authors: Mansfield, Donald H , Smith, James F , Hartman, Ronald L , Downie, Stephen R , Hinchliff, Cody E
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Toxonomists
ID: ISSN: 0363-6445
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title: Phylogenetic Analysis Reveals Multiple Cases of Morphological Parallelism and Taxonomic Polyphyly in Lomatium (Apiaceae)
format: Article
creator:
  • George, Emma E
  • Mansfield, Donald H
  • Smith, James F
  • Hartman, Ronald L
  • Downie, Stephen R
  • Hinchliff, Cody E
subjects:
  • Apiaceae
  • Biological taxonomies
  • Botanical research
  • Botany
  • Classification
  • Convergent Evolution
  • Cymopterus
  • Endemic species
  • Evolution
  • Genera
  • Genetic aspects
  • Genetic research
  • Homoplasy
  • Lomatium
  • Lomatium concinnum
  • Morphology
  • Phylogenetics
  • Phylogeny
  • Plant morphology
  • Polyphyly
  • Taxa
  • Topology
ispartof: Systematic botany, 2014, Vol.39 (2), p.662-675
description: The genera Lomatium and Cymopterus, along with many others, form a group that has been referred to previously as the perennial endemic Apiaceae subfamily Apioideae of western North America. This group of ecologically important and widespread species has been the target of numerous systematic studies, but the evolutionary relationships among these species remain elusive. Here we show that this confusion is due to high levels of morphological parallelism and homoplasy in the characters that have traditionally been used to define them, a result that is concordant with previous studies of the group. We explore patterns of evolution in traditionally important morphological characters using Bayesian stochastic character mapping on a phylogeny constructed from novel nrDNA and cpDNA sequence data for 96 specific and infraspecific taxa of the estimated 200 species in the group. We consider the implications of these results for taxonomic classification, the evolution of morphologies, and the utility of these morphologies to delimit small and large clades. Lomatium concinnum is newly combined as Cymopterus glomeratus var. concinnus and the new combination Cymopterus glomeratus var. greeleyorus is made.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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creatorGeorge, Emma E ; Mansfield, Donald H ; Smith, James F ; Hartman, Ronald L ; Downie, Stephen R ; Hinchliff, Cody E
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descriptionThe genera Lomatium and Cymopterus, along with many others, form a group that has been referred to previously as the perennial endemic Apiaceae subfamily Apioideae of western North America. This group of ecologically important and widespread species has been the target of numerous systematic studies, but the evolutionary relationships among these species remain elusive. Here we show that this confusion is due to high levels of morphological parallelism and homoplasy in the characters that have traditionally been used to define them, a result that is concordant with previous studies of the group. We explore patterns of evolution in traditionally important morphological characters using Bayesian stochastic character mapping on a phylogeny constructed from novel nrDNA and cpDNA sequence data for 96 specific and infraspecific taxa of the estimated 200 species in the group. We consider the implications of these results for taxonomic classification, the evolution of morphologies, and the utility of these morphologies to delimit small and large clades. Lomatium concinnum is newly combined as Cymopterus glomeratus var. concinnus and the new combination Cymopterus glomeratus var. greeleyorus is made.
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subjectApiaceae ; Biological taxonomies ; Botanical research ; Botany ; Classification ; Convergent Evolution ; Cymopterus ; Endemic species ; Evolution ; Genera ; Genetic aspects ; Genetic research ; Homoplasy ; Lomatium ; Lomatium concinnum ; Morphology ; Phylogenetics ; Phylogeny ; Plant morphology ; Polyphyly ; Taxa ; Topology
ispartofSystematic botany, 2014, Vol.39 (2), p.662-675
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abstractThe genera Lomatium and Cymopterus, along with many others, form a group that has been referred to previously as the perennial endemic Apiaceae subfamily Apioideae of western North America. This group of ecologically important and widespread species has been the target of numerous systematic studies, but the evolutionary relationships among these species remain elusive. Here we show that this confusion is due to high levels of morphological parallelism and homoplasy in the characters that have traditionally been used to define them, a result that is concordant with previous studies of the group. We explore patterns of evolution in traditionally important morphological characters using Bayesian stochastic character mapping on a phylogeny constructed from novel nrDNA and cpDNA sequence data for 96 specific and infraspecific taxa of the estimated 200 species in the group. We consider the implications of these results for taxonomic classification, the evolution of morphologies, and the utility of these morphologies to delimit small and large clades. Lomatium concinnum is newly combined as Cymopterus glomeratus var. concinnus and the new combination Cymopterus glomeratus var. greeleyorus is made.
pubAmerican Society of Plant Toxonomists
doi10.1600/036364414X680843
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