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Citation for Study 14663

Citation title: "Revisiting the morphology and phylogeny of Lactifluus with three new lineages from southern China".

Study name: "Revisiting the morphology and phylogeny of Lactifluus with three new lineages from southern China".

This study is part of submission 14663 (Status: Published).

Citation

Wang X., Buyck B., Verbeken A., & Hansen K. 2015. Revisiting the morphology and phylogeny of Lactifluus with three new lineages from southern China. Mycologia, .

Authors

• Wang X.
• Buyck B.
• Verbeken A.
• Hansen K. +46 (0)8 5195 4248

Abstract

As a recent group mainly defined by molecular data, the genus Lactifluus is in high need of further study to provide insight into the morphological and molecular variation within the genus, species limits and relationships. Phylogenetic analyses of nuc rDNA ITS1-5.8S-ITS2 (ITS), D1 and D2 domains of nuc 28S rDNA (28S), and part of the second largest subunit of the RNA polymerase II (rpb2) (6?7 region) sequences of 28 samples from southern China revealed three new lineages of Lactifluus. Two of them are nested in a major clade that includes the type of Lactifluus, treated as two new sections: L. sect. Ambicystidiati and L. sect. Tenuicystidiati. Lactifluus ambicystidiati, described here as a new species (= sect. Ambicystidiati), has both lamprocystidia and macrocystidia in the hymenium, a unique combination of features within Russulaceae. Furthermore, only remnants of lactiferous hyphae are present in L. ambicystidiatus and our results suggest that the ability to form a lactiferous system has been lost in this lineage within Lactifluus. Lactifluus sect. Tenuicystidiati formed a strongly supported monophyletic group as a sister lineage to L. sect. Lactifluus (the L. volemus species complex). We recognize it based on the thin-walled macrocystidia and smaller ellipsoid spores. The former placement of L. tenuicystidiatus in the African L. sect. Pseudogymnocarpi was not supported. Using genealogical concordance we recognize five phylogenetic species within L. sect. Tenuicystidiati, and describe two of these as new, L. subpruinosus and L. tropicosinicus. The third lineage, represented by L. leoninus, formed a sister group to L. subg. Lactariopsis sensu stricto. The three lineages provide further evidence for morphological features in Lactifluus being homoplasious. Some sections and species complexes are likely to constitute more species and merit further investigations and subtropical-tropical Asia is likely a key region in accomplishing the sampling.

Keywords

Lactarius, lactiferous hyphae, Russulaceae, subtropical-tropical Asia, taxonomy

External links

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S14663
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref24314,
  	 author = {Xiang-Hua  Wang and Bart  Buyck and Annemieke  Verbeken and Karen  Hansen},
  	 title = {Revisiting the morphology and phylogeny of Lactifluus with three new lineages from southern China},
  	 year = {2015},
  	 keywords = {Lactarius, lactiferous hyphae, Russulaceae, subtropical-tropical Asia, taxonomy},
  	 doi = {},
  	 url = {http://},
  	 pmid = {},
  	 journal = {Mycologia},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {As a recent group mainly defined by molecular data, the genus Lactifluus is in high need of further study to provide insight into the morphological and molecular variation within the genus, species limits and relationships. Phylogenetic analyses of nuc rDNA ITS1-5.8S-ITS2 (ITS), D1 and D2 domains of nuc 28S rDNA (28S), and part of the second largest subunit of the RNA polymerase II (rpb2) (6?7 region) sequences of 28 samples from southern China revealed three new lineages of Lactifluus. Two of them are nested in a major clade that includes the type of Lactifluus, treated as two new sections: L. sect. Ambicystidiati and L. sect. Tenuicystidiati. Lactifluus ambicystidiati, described here as a new species (= sect. Ambicystidiati), has both lamprocystidia and macrocystidia in the hymenium, a unique combination of features within Russulaceae. Furthermore, only remnants of lactiferous hyphae are present in L. ambicystidiatus and our results suggest that the ability to form a lactiferous system has been lost in this lineage within Lactifluus. Lactifluus sect. Tenuicystidiati formed a strongly supported monophyletic group as a sister lineage to L. sect. Lactifluus (the L. volemus species complex). We recognize it based on the thin-walled macrocystidia and smaller ellipsoid spores. The former placement of L. tenuicystidiatus in the African L. sect. Pseudogymnocarpi was not supported. Using genealogical concordance we recognize five phylogenetic species within L. sect. Tenuicystidiati, and describe two of these as new, L. subpruinosus and L. tropicosinicus. The third lineage, represented by L. leoninus, formed a sister group to L. subg. Lactariopsis sensu stricto. The three lineages provide further evidence for morphological features in Lactifluus being homoplasious. Some sections and species complexes are likely to constitute more species and merit further investigations and subtropical-tropical Asia is likely a key region in accomplishing the sampling.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 24314
  AU  - Wang,Xiang-Hua 
  AU  - Buyck,Bart 
  AU  - Verbeken,Annemieke 
  AU  - Hansen,Karen 
  T1  - Revisiting the morphology and phylogeny of Lactifluus with three new lineages from southern China
  PY  - 2015
  KW  - Lactarius
  KW  - lactiferous hyphae
  KW  - Russulaceae
  KW  - subtropical-tropical Asia
  KW  - taxonomy
  UR  - http://dx.doi.org/
  N2  - As a recent group mainly defined by molecular data, the genus Lactifluus is in high need of further study to provide insight into the morphological and molecular variation within the genus, species limits and relationships. Phylogenetic analyses of nuc rDNA ITS1-5.8S-ITS2 (ITS), D1 and D2 domains of nuc 28S rDNA (28S), and part of the second largest subunit of the RNA polymerase II (rpb2) (6?7 region) sequences of 28 samples from southern China revealed three new lineages of Lactifluus. Two of them are nested in a major clade that includes the type of Lactifluus, treated as two new sections: L. sect. Ambicystidiati and L. sect. Tenuicystidiati. Lactifluus ambicystidiati, described here as a new species (= sect. Ambicystidiati), has both lamprocystidia and macrocystidia in the hymenium, a unique combination of features within Russulaceae. Furthermore, only remnants of lactiferous hyphae are present in L. ambicystidiatus and our results suggest that the ability to form a lactiferous system has been lost in this lineage within Lactifluus. Lactifluus sect. Tenuicystidiati formed a strongly supported monophyletic group as a sister lineage to L. sect. Lactifluus (the L. volemus species complex). We recognize it based on the thin-walled macrocystidia and smaller ellipsoid spores. The former placement of L. tenuicystidiatus in the African L. sect. Pseudogymnocarpi was not supported. Using genealogical concordance we recognize five phylogenetic species within L. sect. Tenuicystidiati, and describe two of these as new, L. subpruinosus and L. tropicosinicus. The third lineage, represented by L. leoninus, formed a sister group to L. subg. Lactariopsis sensu stricto. The three lineages provide further evidence for morphological features in Lactifluus being homoplasious. Some sections and species complexes are likely to constitute more species and merit further investigations and subtropical-tropical Asia is likely a key region in accomplishing the sampling.
  L3  - 
  JF  - Mycologia
  VL  - 
  IS  - 
  ER  -