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

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 squa...

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Bibliographic Details
Published in:The Lichenologist
Main Authors: Fryday, A.F., Elvebakk, Arve, Anderson, F.L., Gagnon, J.Y.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press 2019
Subjects:
VDP::Mathematics and natural science: 400::Zoology and botany: 480
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480
Arctic
Canada
Keglo Bay
Ungava Bay
Online Access:https://hdl.handle.net/10037/18052
https://doi.org/10.1017/S0024282919000288
Description
Summary: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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