Imsharria orangei (Ascomycota, Lecideaceae), a new genus and species, and a new species of Porpidia, from the Falkland Islands

The Lichenologist Pub Date : 2024-09-18 DOI:10.1017/s0024282924000148

Alan M. Fryday, Anna M. Götz, Ulrike Ruprecht

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Abstract

The new genus Imsharria is proposed for a crustose species found on or near mountain summits on the Falkland Islands. It is separated from other genera of Lecideaceae by a combination of Porpidia-type asci, halonate ascospores, immersed apothecia and a hyaline hypothecium, and forms a distinct branch in the phylogenetic analysis using the markers nrITS and mtSSU. The single species, I. orangei, is characterized by its innate apothecia with a brown disc and a thallus containing norstictic acid and an amyloid (I+ violet) medulla. In addition, Porpidia imshaugii is described for a species from the Falkland Islands resembling P. skottsbergiana but with larger ascospores, and Porpidia navarina is shown to belong in the genus Poeltiaria, with the new combination Poeltiaria navarina being made. A key to the Lecideaceae on the Falkland Islands is provided.

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来自福克兰群岛的新属和新种 Imsharria orangei（子囊菌目，Lecideaceae），以及 Porpidia 的一个新种

新属 Imsharria 是福克兰群岛山顶或山顶附近发现的一种壳质物种。该属与 Lecideaceae 其他属的区别在于它具有糙硬毛虫型的无囊孢子、卤酸性的有囊孢子、浸渍的皮孔和透明的下皮孔，并在使用 nrITS 和 mtSSU 标记的系统发育分析中形成了一个独特的分支。I. orangei 的特征是其先天性皮孔带有棕色圆盘，菌体含有去甲睾酮酸和淀粉样（I+ 紫色）髓。此外，Porpidia imshaugii 被描述为福克兰群岛的一个物种，与 P. skottsbergiana 相似，但有更大的 ascospores，Porpidia navarina 被证明属于 Poeltiaria 属，新的组合 Poeltiaria navarina 被建立。本报告还提供了福克兰群岛 Lecideaceae 的检索表。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Lichenologist

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