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28 January 2019 A new saxicolous Circinaria species (Megasporaceae) from northeast China
Gulbostan Ismayil, Abdulla Abbas, Shou-yu Guo
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In an investigation of Circinaria species in volcanic mountains of northeast China, one new species, C. laxilobata was identified based on morphological characteristics and DNA sequence data. The new species differs morphologically from other members of the C. contorta group by its greenish olive, thin thallus with dispersed areoles and elongated, diverging, branching marginal areoles distinctly delimited from the inner part, round apothecia with entire thalline margin, moniliform paraphyses, asci with 1–2 ellipsoid spores, and the absence of secondary metabolites. Comparisons of the ITS sequences of the nuclear ribosomal DNA repeat tandem, both in phylogenetic analyses and secondary structure models of ITS2, support the taxonomic distinctness of this species. The new species is described and illustrated in detail. A key to the species of Circinaria from China is also provided.

©2019 by The American Bryological and Lichenological Society, Inc.
Gulbostan Ismayil, Abdulla Abbas, and Shou-yu Guo "A new saxicolous Circinaria species (Megasporaceae) from northeast China," The Bryologist 122(1), 23-30, (28 January 2019).
Received: 11 June 2018; Accepted: 17 November 2018; Published: 28 January 2019

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