CiteULike

Delicious

Connotea

Citation for Study 11252

Citation title: "Phylogeny of Ifloga and Trichogyne (Asteraceae, Gnaphalieae)".

Study name: "Phylogeny of Ifloga and Trichogyne (Asteraceae, Gnaphalieae)".

This study is part of submission 11242 (Status: Published).

Citation

Bergh N.G., Trisos C.H., & Verboom G.A. 2011. Phylogeny of Ifloga and Trichogyne (Asteraceae, Gnaphalieae). Taxon, .

Authors

• Bergh N.G. (submitter) +27(021)799-8800/8724
• Trisos C.H.
• Verboom G.A.

Abstract

Ifloga and Trichogyne constitute a small but biologically interesting lineage within the Gnaphalieae, a tribe of the Compositae. Species are distributed mainly in the semi-arid parts of southern Africa, while three species are disjunct in the Saharo-Sindian region. Due partly to an unusual capitulum structure, the phylogenetic position of the group has been little-understood. In addition, the monophyly of the genera has not been assessed using phylogenetic methods. A species-level phylogenetic hypothesis is presented, based on one nuclear and two chloroplast DNA regions analysed with parsimony and Bayesian methods. Ifloga + Trichogyne constitute the Ifloga clade that forms one of the early-diverging lineages within tribe Gnaphalieae. These lineages constitute a basal grade with many poorly-supported nodes, precluding robust hypotheses of relationships amongst the lineages. A sister lineage to the Ifloga clade could thus not be identified, although it diverges amongst taxa formerly united in subtribe Relhaniinae. Although this subtribe is now known to be non-monophyletic, members of the Ifloga clade share with former members of Relhaniinae a previously-overlooked set of leaf characters. The genus Trichogyne is monophyletic, but Ifloga is paraphyletic with respect to Trichogyne. To retain generic monophyly, all species are here transferred to the genus Ifloga. Although two of the Northern Hemisphere species were not included in the analysis, morphological characters suggest that the three species from this region are monophyletic, in which case the Saharo-Sindian distribution is the result of a single dispersal northwards from Southern Africa. The new combinations and an updated key to the species are presented.

Keywords

Gnaphalieae, Ifloga, Lasiopogon, molecular phylogeny, Southern Africa, Trichogyne

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S11252
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref19504,
  	 author = {Nicola Georgina Bergh and Christopher Harry Trisos and George Anthony Verboom},
  	 title = {Phylogeny of Ifloga and Trichogyne (Asteraceae, Gnaphalieae)},
  	 year = {2011},
  	 keywords = {Gnaphalieae, Ifloga, Lasiopogon, molecular phylogeny, Southern Africa, Trichogyne},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Taxon},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Ifloga and Trichogyne constitute a small but biologically interesting lineage within the Gnaphalieae, a tribe of the Compositae. Species are distributed mainly in the semi-arid parts of southern Africa, while three species are disjunct in the Saharo-Sindian region. Due partly to an unusual capitulum structure, the phylogenetic position of the group has been little-understood. In addition, the monophyly of the genera has not been assessed using phylogenetic methods.  A species-level phylogenetic hypothesis is presented, based on one nuclear and two chloroplast DNA regions analysed with parsimony and Bayesian methods. Ifloga + Trichogyne constitute the Ifloga clade that forms one of the early-diverging lineages within tribe Gnaphalieae. These lineages constitute a basal grade with many poorly-supported nodes, precluding robust hypotheses of relationships amongst the lineages. A sister lineage to the Ifloga clade could thus not be identified, although it diverges amongst taxa formerly united in subtribe Relhaniinae. Although this subtribe is now known to be non-monophyletic, members of the Ifloga clade share with former members of Relhaniinae a previously-overlooked set of leaf characters. The genus Trichogyne is monophyletic, but Ifloga is paraphyletic with respect to Trichogyne. To retain generic monophyly, all species are here transferred to the genus Ifloga. Although two of the Northern Hemisphere species were not included in the analysis, morphological characters suggest that the three species from this region are monophyletic, in which case the Saharo-Sindian distribution is the result of a single dispersal northwards from Southern Africa. The new combinations and an updated key to the species are presented.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 19504
  AU  - Bergh,Nicola Georgina
  AU  - Trisos,Christopher Harry
  AU  - Verboom,George Anthony
  T1  - Phylogeny of Ifloga and Trichogyne (Asteraceae, Gnaphalieae)
  PY  - 2011
  KW  - Gnaphalieae
  KW  - Ifloga
  KW  - Lasiopogon
  KW  - molecular phylogeny
  KW  - Southern Africa
  KW  - Trichogyne
  UR  - http://dx.doi.org/
  N2  - Ifloga and Trichogyne constitute a small but biologically interesting lineage within the Gnaphalieae, a tribe of the Compositae. Species are distributed mainly in the semi-arid parts of southern Africa, while three species are disjunct in the Saharo-Sindian region. Due partly to an unusual capitulum structure, the phylogenetic position of the group has been little-understood. In addition, the monophyly of the genera has not been assessed using phylogenetic methods.  A species-level phylogenetic hypothesis is presented, based on one nuclear and two chloroplast DNA regions analysed with parsimony and Bayesian methods. Ifloga + Trichogyne constitute the Ifloga clade that forms one of the early-diverging lineages within tribe Gnaphalieae. These lineages constitute a basal grade with many poorly-supported nodes, precluding robust hypotheses of relationships amongst the lineages. A sister lineage to the Ifloga clade could thus not be identified, although it diverges amongst taxa formerly united in subtribe Relhaniinae. Although this subtribe is now known to be non-monophyletic, members of the Ifloga clade share with former members of Relhaniinae a previously-overlooked set of leaf characters. The genus Trichogyne is monophyletic, but Ifloga is paraphyletic with respect to Trichogyne. To retain generic monophyly, all species are here transferred to the genus Ifloga. Although two of the Northern Hemisphere species were not included in the analysis, morphological characters suggest that the three species from this region are monophyletic, in which case the Saharo-Sindian distribution is the result of a single dispersal northwards from Southern Africa. The new combinations and an updated key to the species are presented.
  L3  - 
  JF  - Taxon
  VL  - 
  IS  - 
  ER  -