LYSURUS FOSSATII (LYSURACEAE, BASIDIOMYCOTA). A NEW SPECIES WITH SIMPLE STEM-LIKE RECEPTACLE STRUCTURE, FROM ARGENTINA Lysurus fossatii (Lysuraceae, Basidiomycota). Una nueva especie con receptáculo de estructura de estípite-simple de Argentina.

CAFFOT, MARÍA L. HERNÁNDEZ; NOUHRA, EDUARDO R.; KUHAR, FRANCISCO; CAEIRO, LUCIANA; DOMÍNGUEZ, LAURA S.

DARWINIANA

INSTITUTO DE BOTÁNICA DARWINION

Año: 2022 vol. 10 p. 178 - 186

0011-6793

Lysurus fossatii, a new Lysuraceae species with unique macroscopic features is described and illustrated. Specimens were collected during field expeditions to remnants of the Espinal forest preserved at Estancia Yucat, South-East Córdoba, in central Argentina. The species is diagnosed by a light yellow peridium when immature, with the surface marked by a reticulum corresponding to the peridial sutures. When young and while still enclosed in the peridium, this species can be distinguished by the presence of a small white stipe completely covered by a green gleba. No actual receptacular structure is evidenced and only the stipe supports the gleba. Phylogenetic analyses highly supported the affinity of this species with L. sphaerocephalus in a close clade of L. cruciatus.