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Citation for Study 16534

Citation title: "A new cryptic species in a new cryptic genus in the Caesalpinia group (Leguminosae) from the seasonally dry inter-Andean valleys of South America".

Study name: "A new cryptic species in a new cryptic genus in the Caesalpinia group (Leguminosae) from the seasonally dry inter-Andean valleys of South America".

This study is part of submission 16534 (Status: Published).

Citation

Gagnon E., Hughes C.E., Lewis G.P., & Bruneau A. 2014. A new cryptic species in a new cryptic genus in the Caesalpinia group (Leguminosae) from the seasonally dry inter-Andean valleys of South America. Taxon, .

Authors

• Gagnon E. (submitter) 514-561-7454
• Hughes C.E.
• Lewis G.P.
• Bruneau A.

Abstract

The generic affiliation of the Andean species Caesalpinia trichocarpa, C. mimosifolia, and their close relatives has remained uncertain in all recent studies of Caesalpinia sensu lato (Leguminosae, subfamily Caesalpinioideae). A new densely sampled phylogeny based on four DNA sequence regions (rps16, trnDT, ycf6-psbmR and ITS) suggests that despite the lack of obvious diagnostic morphological synapomorphies, this Andean group should be considered as a distinct genus, here described as the new genus Arquita. Phylogenetic analyses also suggest a problem with species delimitation in this group. Within Caesalpinia trichocarpa, accessions from disjunct geographic areas in Argentina, Bolivia and Peru each form robustly supported cladeswithin a larger unresolved clade that includes Caesalpinia mimosifolia. The morphological and genetic cohesiveness of the Caesalpinia trichocarpa complex is investigated using morphometric phenetic analyses of qualitative and quantitative flower and leaf traits, and reconstruction of a densely sampled phylogeny using three plastid and one nuclear ribosomal DNA sequence loci. Our results suggest that the most geographically isolated of these clades, narrowly endemic to two inter-Andean valleys in central-north Peru and separated by ~1350 km, and extensive high Andean cordilleras above 4000 m, from the nearest populations in Bolivia, represents a genetically highly distinct and morphologically cryptic lineage here described as a new species (Arquita grandiflora). A full taxonomic account of the new genus Arquita and its component species is provided, with distribution maps and a key to the species.

Keywords

Andes, Caesalpinia, Caesalpinioideae-Leguminosae, cryptic species, generic delimitation, morphological analysis, phylogenetic analysis, seasonally dry thornscrub.

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S16534
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref23783,
  	 author = {Edeline  Gagnon and Colin E. Hughes and Gwilym P. Lewis and Anne  Bruneau},
  	 title = {A new cryptic species in a new cryptic genus in the Caesalpinia group (Leguminosae) from the seasonally dry inter-Andean valleys of South America},
  	 year = {2014},
  	 keywords = {Andes, Caesalpinia, Caesalpinioideae-Leguminosae, cryptic species, generic delimitation, morphological analysis, phylogenetic analysis, seasonally dry thornscrub.},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Taxon},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {The generic affiliation of the Andean species Caesalpinia trichocarpa, C. mimosifolia, and their close relatives has remained uncertain in all recent studies of Caesalpinia sensu lato (Leguminosae, subfamily Caesalpinioideae). A new densely sampled phylogeny based on four DNA sequence regions (rps16, trnDT, ycf6-psbmR and ITS) suggests that despite the lack of obvious diagnostic morphological synapomorphies, this Andean group should be considered as a distinct genus, here described as the new genus Arquita. Phylogenetic analyses also suggest a problem with species delimitation in this group. Within Caesalpinia trichocarpa, accessions from disjunct geographic areas in Argentina, Bolivia and Peru each form robustly supported cladeswithin a larger unresolved clade that includes Caesalpinia mimosifolia. The morphological and genetic cohesiveness of the Caesalpinia trichocarpa complex is investigated using morphometric phenetic analyses of qualitative and quantitative flower and leaf traits, and reconstruction of a densely sampled phylogeny using three plastid and one nuclear ribosomal DNA sequence loci. Our results suggest that the most geographically isolated of these clades, narrowly endemic to two inter-Andean valleys in central-north Peru and separated by ~1350 km, and extensive high Andean cordilleras above 4000 m, from the nearest populations in Bolivia, represents a genetically highly distinct and morphologically cryptic lineage here described as a new species (Arquita grandiflora). A full taxonomic account of the new genus Arquita and its component species is provided, with distribution maps and a key to the species.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 23783
  AU  - Gagnon,Edeline 
  AU  - Hughes,Colin E.
  AU  - Lewis,Gwilym P.
  AU  - Bruneau,Anne 
  T1  - A new cryptic species in a new cryptic genus in the Caesalpinia group (Leguminosae) from the seasonally dry inter-Andean valleys of South America
  PY  - 2014
  KW  - Andes
  KW  - Caesalpinia
  KW  - Caesalpinioideae-Leguminosae
  KW  - cryptic species
  KW  - generic delimitation
  KW  - morphological analysis
  KW  - phylogenetic analysis
  KW  - seasonally dry thornscrub.
  UR  - http://dx.doi.org/
  N2  - The generic affiliation of the Andean species Caesalpinia trichocarpa, C. mimosifolia, and their close relatives has remained uncertain in all recent studies of Caesalpinia sensu lato (Leguminosae, subfamily Caesalpinioideae). A new densely sampled phylogeny based on four DNA sequence regions (rps16, trnDT, ycf6-psbmR and ITS) suggests that despite the lack of obvious diagnostic morphological synapomorphies, this Andean group should be considered as a distinct genus, here described as the new genus Arquita. Phylogenetic analyses also suggest a problem with species delimitation in this group. Within Caesalpinia trichocarpa, accessions from disjunct geographic areas in Argentina, Bolivia and Peru each form robustly supported cladeswithin a larger unresolved clade that includes Caesalpinia mimosifolia. The morphological and genetic cohesiveness of the Caesalpinia trichocarpa complex is investigated using morphometric phenetic analyses of qualitative and quantitative flower and leaf traits, and reconstruction of a densely sampled phylogeny using three plastid and one nuclear ribosomal DNA sequence loci. Our results suggest that the most geographically isolated of these clades, narrowly endemic to two inter-Andean valleys in central-north Peru and separated by ~1350 km, and extensive high Andean cordilleras above 4000 m, from the nearest populations in Bolivia, represents a genetically highly distinct and morphologically cryptic lineage here described as a new species (Arquita grandiflora). A full taxonomic account of the new genus Arquita and its component species is provided, with distribution maps and a key to the species.
  L3  - 
  JF  - Taxon
  VL  - 
  IS  - 
  ER  -