Four new species of Morchella from the Americas

Morphological and molecular phylogenetic studies of true morels (Morchella) in North America, the Dominican Republic, Venezuela, Ecuador, and Peru led to the discovery of four undescribed species of Morchella. Two new species in the Elata clade, one from the Dominican Republic, initially distinguish...

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Bibliographic Details
Published in:Mycologia 2018-11, Vol.110 (6), p.1205-1221
Main Authors: Baroni, Timothy J., Beug, Michael W., Cantrell, Sharon A., Clements, Teresa A., Iturriaga, Teresa, Læssøe, Thomas, Holgado Rojas, María E., Aguilar, Frank M., Quispe, Miguel O., Lodge, D. Jean, O'Donnell, Kerry
Format: Article
Language:English
Subjects:
4 new taxa
Arizona
Ascomycota
Dominican Republic
Ecuador
endophytes
molecular phylogenetics
Morchellaceae
Peru
Pezizales
Systematics
Venezuela
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Summary:Morphological and molecular phylogenetic studies of true morels (Morchella) in North America, the Dominican Republic, Venezuela, Ecuador, and Peru led to the discovery of four undescribed species of Morchella. Two new species in the Elata clade, one from the Dominican Republic, initially distinguished by the informal designation Mel-18, and a newly discovered sister species from northern Arizona, are now recognized. Mel-18 is described as a novel phylogenetically distinct species, M. hispaniolensis. Its sister species from Arizona is described as M. kaibabensis, also recovered as an endophyte of Rocky Mountain juniper. Two additional species in the Esculenta clade, M. peruviana discovered in Peru and M. gracilis (previously reported as Mes-14) from the Dominican Republic, Venezuela, and Ecuador, are described as new. We also demonstrate that scanning electron microscopy (SEM) imaging of ascospores using rehydration/dehydration/critical point drying preparation techniques provides for enhanced resolution of spore wall surfaces, thereby increasing the number of morphological traits available to assess differences among otherwise closely related species.
ISSN:0027-5514
1557-2536
DOI:10.1080/00275514.2018.1533772