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A new heat-resistant species of Leiothecium Samson & Mouch. (Eurotiales, Ascomycota) from soil of Argentina

Leiothecium Samson & Mouch. is a genus enclosed into the family Aspergillaceae Link (Eurotiales) including L. ellipsoideum Samson & Mouch. and L. cristatum Y. Marín, Stchigel & Cano, species exhibiting ascospore walls somewhat or irregularly reticulated and prominent crests. During a research on hea...

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Main Authors: Romero, Stella Maris, Rodriguez Andrade, Ernesto, Romero, Andrea Irene, Amarilla, Leonardo David, Comerio, Ricardo Mario
Format: info:ar-repo/semantics/artículo
Language:Inglés
Published: Muséum National d'Histoire Naturelle (Francia) 2026
Subjects:
Ascospora
Especie Nueva
Hongos
Ascospores
New Species
Fungi
Argentina
Aspergillaceae
Ascosporas Reticuladas
Ascomata Cleistoteciales
Región Semiárida
Especie Termoresistente
Online Access:http://hdl.handle.net/20.500.12123/24937
https://sciencepress.mnhn.fr/en/periodiques/mycologie/46/4
Summary:Leiothecium Samson & Mouch. is a genus enclosed into the family Aspergillaceae Link (Eurotiales) including L. ellipsoideum Samson & Mouch. and L. cristatum Y. Marín, Stchigel & Cano, species exhibiting ascospore walls somewhat or irregularly reticulated and prominent crests. During a research on heat-resistant fungi from soil of the semi-arid region of Northern Argentina, several Leiothecium spp. isolates were obtained; morphological and molecular studies were carried out. Phylogenetics showed strong support for the monophyly of the Leiothecium clade and L. ellipsoideum as the sister taxon. Some isolates were identified as Leiothecium ellipsoideum, and a new species provided with reticulate-foveate ascospore ornamentation without prominent crests was described: Leiothecium dictyophorum S.M.Romero & Comerio, sp. nov. Molecular analysis and scanning electron microscopy (SEM) images support the description of L. dictyophorum S.M.Romero & Comerio, sp. nov. as a new species.

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