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What's in a Name? Disentangling the Dicranum scoparium Species Complex (Dicranaceae, Bryophyta)

Dicranum is a large (ca. 90 species) and taxonomically complex moss genus. Circumscriptions and relationships of many Dicranum species remain ambiguous due to the absence of a worldwide revision and comprehensive phylogenetic analyses. In this study, we address species circumscriptions and relations... Full description

Journal Title: Systematic botany 2014-05, Vol.39 (2), p.369-379
Main Author: Lang, Annick
Other Authors: Stech, Michael
Format: Electronic Article Electronic Article
Language: English
Subjects:
ITS
Quelle: Alma/SFX Local Collection
Publisher: American Society of Plant Toxonomists
ID: ISSN: 0363-6445
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title: What's in a Name? Disentangling the Dicranum scoparium Species Complex (Dicranaceae, Bryophyta)
format: Article
creator:
  • Lang, Annick
  • Stech, Michael
subjects:
  • Biological taxonomies
  • Botanical research
  • Botany
  • Bryophytes
  • Chloroplast DNA
  • Chloroplasts
  • Humus
  • Identification and classification
  • ITS
  • Leaves
  • Maximum parsimony
  • Molecular Phylogeny
  • Morphology
  • Mosses
  • Nomenclature
  • Phylogenetics
  • Plants
  • Species Circumscriptions
  • Taxa
ispartof: Systematic botany, 2014-05, Vol.39 (2), p.369-379
description: Dicranum is a large (ca. 90 species) and taxonomically complex moss genus. Circumscriptions and relationships of many Dicranum species remain ambiguous due to the absence of a worldwide revision and comprehensive phylogenetic analyses. In this study, we address species circumscriptions and relationships of presumed close allies within Dicranum sect. Dicranum. Molecular phylogenetic reconstructions based on five chloroplast regions and nrITS suggest a close relationship between D. bonjeanii, D. howellii, D. nipponense, D. japonicum, D. cf. lorifolium, and D. scoparium, which can be regarded as the D. scoparium species complex. In contrast, D. majus and D. polysetum, as well as D. fuscescens and D. spadiceum (former varieties of D. scoparium), are separated from the complex. Molecular data are generally congruent with the morphological species concept, but the circumscriptions of D. bonjeanii, D. japonicum, D. cf. lorifolium, and D. scoparium need further study. Most analyzed D. scoparium specimens from across its Holarctic distribution are contained in one clade (D. scoparium s. s.), but a number of North American specimens are resolved as closely related to D. japonicum and D. cf. lorifolium. Costa cross sections and characters of the leaf apex (shape, serrulation of margins) are most relevant for identifying the studied Dicranum species morphologically.
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0363-6445
fulltext: fulltext
issn:
  • 0363-6445
  • 1548-2324
url: Link


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descriptionDicranum is a large (ca. 90 species) and taxonomically complex moss genus. Circumscriptions and relationships of many Dicranum species remain ambiguous due to the absence of a worldwide revision and comprehensive phylogenetic analyses. In this study, we address species circumscriptions and relationships of presumed close allies within Dicranum sect. Dicranum. Molecular phylogenetic reconstructions based on five chloroplast regions and nrITS suggest a close relationship between D. bonjeanii, D. howellii, D. nipponense, D. japonicum, D. cf. lorifolium, and D. scoparium, which can be regarded as the D. scoparium species complex. In contrast, D. majus and D. polysetum, as well as D. fuscescens and D. spadiceum (former varieties of D. scoparium), are separated from the complex. Molecular data are generally congruent with the morphological species concept, but the circumscriptions of D. bonjeanii, D. japonicum, D. cf. lorifolium, and D. scoparium need further study. Most analyzed D. scoparium specimens from across its Holarctic distribution are contained in one clade (D. scoparium s. s.), but a number of North American specimens are resolved as closely related to D. japonicum and D. cf. lorifolium. Costa cross sections and characters of the leaf apex (shape, serrulation of margins) are most relevant for identifying the studied Dicranum species morphologically.
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subjectBiological taxonomies ; Botanical research ; Botany ; Bryophytes ; Chloroplast DNA ; Chloroplasts ; Humus ; Identification and classification ; ITS ; Leaves ; Maximum parsimony ; Molecular Phylogeny ; Morphology ; Mosses ; Nomenclature ; Phylogenetics ; Plants ; Species Circumscriptions ; Taxa
ispartofSystematic botany, 2014-05, Vol.39 (2), p.369-379
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abstractDicranum is a large (ca. 90 species) and taxonomically complex moss genus. Circumscriptions and relationships of many Dicranum species remain ambiguous due to the absence of a worldwide revision and comprehensive phylogenetic analyses. In this study, we address species circumscriptions and relationships of presumed close allies within Dicranum sect. Dicranum. Molecular phylogenetic reconstructions based on five chloroplast regions and nrITS suggest a close relationship between D. bonjeanii, D. howellii, D. nipponense, D. japonicum, D. cf. lorifolium, and D. scoparium, which can be regarded as the D. scoparium species complex. In contrast, D. majus and D. polysetum, as well as D. fuscescens and D. spadiceum (former varieties of D. scoparium), are separated from the complex. Molecular data are generally congruent with the morphological species concept, but the circumscriptions of D. bonjeanii, D. japonicum, D. cf. lorifolium, and D. scoparium need further study. Most analyzed D. scoparium specimens from across its Holarctic distribution are contained in one clade (D. scoparium s. s.), but a number of North American specimens are resolved as closely related to D. japonicum and D. cf. lorifolium. Costa cross sections and characters of the leaf apex (shape, serrulation of margins) are most relevant for identifying the studied Dicranum species morphologically.
pubAmerican Society of Plant Toxonomists
doi10.1600/036364414X680735
tpages11