IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Resurrecting the genus Geomorium: Systematic study of fungi in the genera Underwoodia and Gymnohydnotrya (Pezizales) with the description of three new South American species
Autor/es:
KRAISITUDOMSOOK, N.; TRUONG, C.; PFISTER, D.H.; MUJIC, A.B.; KUHAR, F.; SMITH, M.E.; HEALY, R.A.; NOUHRA, E.; TRAPPE, J.M.
Revista:
PERSOONIA
Editorial:
RIJKSHERBARIUM
Referencias:
Lugar: Leiden; Año: 2019 p. 16 - 19
ISSN:
0031-5850
Resumen:
Molecular phylogenetic analyses have addressed the systematic position of several major NorthernHemisphere lineages of Pezizales but the taxa of the Southern Hemisphere remain understudied. This study focuseson the molecular systematics and taxonomy of Southern Hemisphere species currently treated in the genera Underwoodiaand Gymnohydnotrya. Species in these genera have been identified as the monophyletic /gymnohydnotryalineage, but no further research has been conducted to determine the evolutionary origin of this lineage or its relationshipwith other Pezizales lineages. Here, we present a phylogenetic study of fungal species previously describedin Underwoodia and Gymnohydnotrya, with sampling of all but one described species. We revise the taxonomy ofthis lineage and describe three new species from the Patagonian region of South America. Our results show thatnone of these Southern Hemisphere species are closely related to Underwoodia columnaris, the type species ofthe genus Underwoodia. Accordingly, we recognize the genus Geomorium described by Spegazzini in 1922 forG. fuegianum. We propose the new family, Geomoriaceae fam. nov., to accommodate this phylogenetically andmorphologically unique Southern Hemisphere lineage. Molecular dating estimated that Geomoriaceae startedto diverge from its sister clade Tuberaceae c. 112 MYA, with a crown age for the family in the late Cretaceous(c. 67 MYA). This scenario fits well with a Gondwanan origin of the family before the split of Australia and SouthAmerica from Antarctica during the Paleocene-Eocene boundary (c. 50 MYA).