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Collolechia revisited and a re-assessment of ascus characteristics in Placynthiaceae (Peltigerales, Ascomycota)

Published online by Cambridge University Press:  14 January 2016

Alica KOŠUTHOVÁ ,
Samantha FERNÁNDEZ-BRIME ,
Martin WESTBERG  and
Mats WEDIN
Alica KOŠUTHOVÁ
Affiliation:
Department of Cryptogams, Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, Bratislava, 845 23, Slovakia Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, Brno, 61137, Czech Republic
Samantha FERNÁNDEZ-BRIME
Affiliation:
(corresponding author): Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05 Stockholm, Sweden. Email: mats.wedin@nrm.se
Martin WESTBERG
Affiliation:
(corresponding author): Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05 Stockholm, Sweden. Email: mats.wedin@nrm.se
Mats WEDIN
Affiliation:
(corresponding author): Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05 Stockholm, Sweden. Email: mats.wedin@nrm.se
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Abstract

We investigated the phylogenetic relationships in the cyanolichen family Placynthiaceae to test the current generic delimitations, where the monotypic Collolechia is currently accepted as distinct, based on differences in ascospores, ascus apex characteristics and the leprose thallus. Bayesian and maximum likelihood phylogenetic analyses of two sequence marker datasets confirmed that Collolechia caesia is nested within Placynthium, and should be called Placynthium caesium (Fr.) Jatta. We reassessed the spore and ascus characteristics and showed that Placynthium caesium falls well within the variation in Placynthium and is thus yet another example of a species that differs from close relatives by its crustose-leprose thallus structure.

Keywords

ascus structureclassificationlichensmorphologyphylogeneticstaxonomy
Type
Articles
Information
The Lichenologist , Volume 48 , Issue 1 , January 2016 , pp. 3 - 12
Copyright
© British Lichen Society, 2016 

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