Advanced

The lichen genera Arctocetraria, Cetraria and Cetrariella (Parmeliaceae) and their presumed evolutionary affinities.

Kärnefelt, Ingvar LU ; Mattsson, Jan-Eric and Thell, Arne LU (1993) In Bryologist 96(3). p.394-404
Abstract
A circumscription of the lichen genus Cetraria Ach. s.s., presently comprising 15 species, is made. The genus is characterized by oblong, citriform conidia as well as characters of the ascus: a small axial body and a distinct amyloid ring structure in the tholus (the region between the ocular chamber and the outer membranes in the apex of the ascus). All fertile species of Coelocaulon Link are incorporated into Cetraria, based upon the similarities in ascus structures and conidia. Two new combinations are made: Cetraria crespoae (Barreno & Vázquez) Kärnef. and C. steppae (Sav.) Kärnef. Two new genera, Arctocetraria Kärnef & Thell and Cetrariella Kärnef. & Thell are described, each of which differs in ascus structure from... (More)
A circumscription of the lichen genus Cetraria Ach. s.s., presently comprising 15 species, is made. The genus is characterized by oblong, citriform conidia as well as characters of the ascus: a small axial body and a distinct amyloid ring structure in the tholus (the region between the ocular chamber and the outer membranes in the apex of the ascus). All fertile species of Coelocaulon Link are incorporated into Cetraria, based upon the similarities in ascus structures and conidia. Two new combinations are made: Cetraria crespoae (Barreno & Vázquez) Kärnef. and C. steppae (Sav.) Kärnef. Two new genera, Arctocetraria Kärnef & Thell and Cetrariella Kärnef. & Thell are described, each of which differs in ascus structure from Cetraria. The new combinations Arctocetraria andrejevii (Oxn.) Kärnef. & Thell, A. nigricascens (Nyl. in Kihim.) Kärnef. & Thell, Cetrariella delisei (Schaer.) Kärnef. & Thell, and C. fastigiata (Nyl.) Kärnef. & Thell are made. Two additional species, earlier presumed to belong to Cetraria in the rather strict sense, are transferred to Tuckermannopsis Gyeln., mainly because of similarities in the ascus structure; the new combinations Tuckermannopsis inermis (Nyl.) Kärnef. and T. subalpina (Imsh.) Kärnef. are made to reflect this change. The presumed evolutionary affinities of all of these taxa are discussed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Bryologist
volume
96
issue
3
pages
394 - 404
publisher
AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC
ISSN
1938-4378
language
English
LU publication?
yes
id
dc520457-8880-4a97-b5b3-8495a525cf1d (old id 2156705)
alternative location
http://www.jstor.org/stable/3243869
date added to LUP
2011-09-19 12:46:13
date last changed
2016-04-15 20:47:31
@article{dc520457-8880-4a97-b5b3-8495a525cf1d,
  abstract     = {A circumscription of the lichen genus Cetraria Ach. s.s., presently comprising 15 species, is made. The genus is characterized by oblong, citriform conidia as well as characters of the ascus: a small axial body and a distinct amyloid ring structure in the tholus (the region between the ocular chamber and the outer membranes in the apex of the ascus). All fertile species of Coelocaulon Link are incorporated into Cetraria, based upon the similarities in ascus structures and conidia. Two new combinations are made: Cetraria crespoae (Barreno & Vázquez) Kärnef. and C. steppae (Sav.) Kärnef. Two new genera, Arctocetraria Kärnef & Thell and Cetrariella Kärnef. & Thell are described, each of which differs in ascus structure from Cetraria. The new combinations Arctocetraria andrejevii (Oxn.) Kärnef. & Thell, A. nigricascens (Nyl. in Kihim.) Kärnef. & Thell, Cetrariella delisei (Schaer.) Kärnef. & Thell, and C. fastigiata (Nyl.) Kärnef. & Thell are made. Two additional species, earlier presumed to belong to Cetraria in the rather strict sense, are transferred to Tuckermannopsis Gyeln., mainly because of similarities in the ascus structure; the new combinations Tuckermannopsis inermis (Nyl.) Kärnef. and T. subalpina (Imsh.) Kärnef. are made to reflect this change. The presumed evolutionary affinities of all of these taxa are discussed.},
  author       = {Kärnefelt, Ingvar and Mattsson, Jan-Eric and Thell, Arne},
  issn         = {1938-4378},
  language     = {eng},
  number       = {3},
  pages        = {394--404},
  publisher    = {AMER BRYOLOGICAL LICHENOLOGICAL SOCIETY INC},
  series       = {Bryologist},
  title        = {The lichen genera Arctocetraria, Cetraria and Cetrariella (Parmeliaceae) and their presumed evolutionary affinities.},
  volume       = {96},
  year         = {1993},
}