Article (Scientific journals)
Disentangling the Peltigera polydactylon Species Complex by Recognizing Two New Taxa, P. polydactylon subsp. udeghe and P. seneca
Magain, Nicolas; Sérusiaux, Emmanuël; Zhurbenko, Mikhail P et al.
2016In Herzogia, 29 (2), p. 514-528
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Keywords :
Cyanolichens; lichen-forming fungi; Nostoc; phylogeny; species discovery and validation; taxonomy
Abstract :
[en] A new species, Peltigera seneca, and two subspecies within P. polydactylon (s.str.), P. polydactylon subsp. udeghe and P. polydactylon subsp. polydactylon, were segregated from a broadly defined P. polydactylon s.lat., based mostly on molecular data and distinct geographical ranges. Peltigera polydactylon s.str. and P. seneca form well-supported monophyletic lineages that share a most recent common ancestor and were recognized as two distinct species by multiple species delimitation and validation methods. Peltigera polydactylon s. str. has a broad intercontinental distribution whereas the new species P. seneca is restricted to eastern North America where it seems to be rare. Peltigera polydactylon subsp. udeghe and P. polydactylon subsp. polydactylon, were defined to accommodate two monophyletic and strongly supported clades separated geographically (North America, eastern Northern Asia and Australasia versus Europe, Middle East and central Northern Asia, respectively). Despite the low genetic distance, especially for the ITS, between these two subspecies, they are well segregated genetically throughout their allopatric ranges. However, there seems to be an intermediary pattern of variation in the geographical area where both taxa are likely to co-occur (e.g., central and eastern Northern Asia). Phenotypic traits have limited value in distinguishing these three taxa. They are chemically (secondary metabolites) similar and share the same Nostoc (cyanobiont) phylogroup. Nevertheless, there are helpful phenotypic trends in addition to their diagnostic genotypes.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Magain, Nicolas  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Sérusiaux, Emmanuël ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Zhurbenko, Mikhail P;  Russian Academy of Science
Lutzoni, Francois;  Duke University
Miadlikowska, Jolanta;  Duke University
Language :
English
Title :
Disentangling the Peltigera polydactylon Species Complex by Recognizing Two New Taxa, P. polydactylon subsp. udeghe and P. seneca
Publication date :
2016
Journal title :
Herzogia
ISSN :
0018-0971
Publisher :
Cramer, Lehre, Germany
Volume :
29
Issue :
2
Pages :
514-528
Peer reviewed :
Peer reviewed
Available on ORBi :
since 26 September 2018

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