Psoroma nivale ( Pannariaceae , lichenized Ascomycota) a new species with dark, elongate squamules and bacilliform ascospores from arctic Québec, Canada

Abstract The new species Psoroma nivale is described from an area of late snow-lie in the Keglo Bay area on the eastern side of Ungava Bay, northern Québec, Canada. It is superficially similar to P. hypnorum but has a dark, brownish black thallus colour without reddish hues, much-branched, prolifera...

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Bibliographic Details
Published in:The Lichenologist
Main Authors: FRYDAY, Alan M., ELVEBAKK, Arve, ANDERSON, Frances L., GAGNON, Jean Y.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2019
Subjects:
Ecology, Evolution, Behavior and Systematics
Arctic
Canada
Ungava Bay
Keglo Bay
Online Access:http://dx.doi.org/10.1017/s0024282919000288
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0024282919000288
Description
Summary:Abstract The new species Psoroma nivale is described from an area of late snow-lie in the Keglo Bay area on the eastern side of Ungava Bay, northern Québec, Canada. It is superficially similar to P. hypnorum but has a dark, brownish black thallus colour without reddish hues, much-branched, proliferating squamules, thick paraphyses, distinct but inconspicuous IKI+ ascus tube structures, and characteristic elongate, bacilliform, often asymmetrical ascospores. The new species is compared with possible related taxa and its systematic position discussed. A key to the species of pannarioid lichens reported from arctic areas of North America is also provided.

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