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The evaluation of characters in lichenized families, exemplified with the alectorioid and some parmelioid genera

Kärnefelt, Ingvar LU and Thell, Arne LU (1992) In Plant Systematics and Evolution 180(3-4). p.181-204
Abstract
Important characters in the classification of the lichenized familyAlectoriaceae (Lecanorales) are discussed and evaluated. A few associated genera presently accommodated in the familyParmeliaceae (Lecanorales) are also discussed. Characters in the asci and hamathecium are of major importance, but structural characters such as general thallus organization and anatomy of cortical layers must also be considered. Secondary chemical products, however, were not found to be decisive for the circumscription of this family. Only three genera, Alectoria, Oropogon, and Sulcaria, can be included, based mainly on the structure of the large, strongly amyloid asci; the rather large and darkly pigmented, thick-walled spores, usually few per ascus; and... (More)
Important characters in the classification of the lichenized familyAlectoriaceae (Lecanorales) are discussed and evaluated. A few associated genera presently accommodated in the familyParmeliaceae (Lecanorales) are also discussed. Characters in the asci and hamathecium are of major importance, but structural characters such as general thallus organization and anatomy of cortical layers must also be considered. Secondary chemical products, however, were not found to be decisive for the circumscription of this family. Only three genera, Alectoria, Oropogon, and Sulcaria, can be included, based mainly on the structure of the large, strongly amyloid asci; the rather large and darkly pigmented, thick-walled spores, usually few per ascus; and the structure of the anastomosing paraphysoids. Arguments are also given as to why the other alectorioid genera, i.e. Bryocaulon, Bryoria and Pseudephebe must be excluded from this family. Similarly developed ascus and hamathecial structures are also discussed in a few unrelated parmelioid genera: Cetrelia, Menegazzia, Parmelaria, and Parmelia. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
Ascomycotina, Lecanorales, Alectoriaceae, Parmeliaceae, asci, ascospores, hamathecium, anatomy
in
Plant Systematics and Evolution
volume
180
issue
3-4
pages
181 - 204
publisher
Springer
external identifiers
  • scopus:0003223471
ISSN
1615-6110
language
English
LU publication?
yes
id
b2b6a25c-5289-4816-b795-b13b16714217 (old id 2157362)
alternative location
http://www.springerlink.com/content/p74g4581t3405267/fulltext.pdf
date added to LUP
2011-09-27 14:01:55
date last changed
2017-01-01 04:38:55
@article{b2b6a25c-5289-4816-b795-b13b16714217,
  abstract     = {Important characters in the classification of the lichenized familyAlectoriaceae (Lecanorales) are discussed and evaluated. A few associated genera presently accommodated in the familyParmeliaceae (Lecanorales) are also discussed. Characters in the asci and hamathecium are of major importance, but structural characters such as general thallus organization and anatomy of cortical layers must also be considered. Secondary chemical products, however, were not found to be decisive for the circumscription of this family. Only three genera, Alectoria, Oropogon, and Sulcaria, can be included, based mainly on the structure of the large, strongly amyloid asci; the rather large and darkly pigmented, thick-walled spores, usually few per ascus; and the structure of the anastomosing paraphysoids. Arguments are also given as to why the other alectorioid genera, i.e. Bryocaulon, Bryoria and Pseudephebe must be excluded from this family. Similarly developed ascus and hamathecial structures are also discussed in a few unrelated parmelioid genera: Cetrelia, Menegazzia, Parmelaria, and Parmelia.},
  author       = {Kärnefelt, Ingvar and Thell, Arne},
  issn         = {1615-6110},
  keyword      = {Ascomycotina,Lecanorales,Alectoriaceae,Parmeliaceae,asci,ascospores,hamathecium,anatomy},
  language     = {eng},
  number       = {3-4},
  pages        = {181--204},
  publisher    = {Springer},
  series       = {Plant Systematics and Evolution},
  title        = {The evaluation of characters in lichenized families, exemplified with the alectorioid and some parmelioid genera},
  volume       = {180},
  year         = {1992},
}