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Abstract Detail



Bryological and Lichenological Section/ABLS

McCune, Bruce [1], Di Meglio, Joseph [2], Curtis, Marc J. [2].

An unusual ascospore shape and a new species, Umbilicaria nodulospora (Umbilicariaceae), from California and Oregon.

We describe Umbilicaria nodulospora, a distinctive new species occurring on steep rock faces on old lava flows in California and Oregon. The species is unusual among lichenized ascomycetes in consistently having one or two shallowly bulging knobs at one end, suggesting a T, Y, or L shape; otherwise they are consistent with the appearance of ascospores in most Umbilicaria species. The species is readily distinguished in the field by a grayish tone to the brown upper surface, in combination with a thickly rhizinate lower surface. Distinctiveness of the species was supported by analysis of the ITS and LSU regions of nrDNA. No close relative or sister taxon was found. Umbilicaria nodulospora is so far known only from geologically recent flood basalts in central Oregon to northeastern California. Narrow endemics are seldom seen with lichens, much less in species frequenting subcontinental or continental climates. Is this species a narrow geographic endemic? Is it truly restricted to lava flows? The only resolution to these puzzles is more extensive searching for the species, which we hope this paper will stimulate.


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1 - Oregon State University , Botany and Plant Pathology, 2082 Cordley Hall, Corvallis, OR, 97331, USA
2 - Oregon State University, Botany and Plant Pathology, Corvallis, OR, 97331, USA

Keywords:
California
Lecanorales
Oregon
Umbilicariaceae
molecular systematics.

Presentation Type: Oral Paper:Papers for Sections
Session: 29
Location: River Fork/Grove
Date: Tuesday, July 29th, 2014
Time: 1:45 PM
Number: 29002
Abstract ID:340
Candidate for Awards:None


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