Order: Ostropales Family: Incertae sedis
Species: Thelopsis rubella
Photos: Glengarriff woods, Co. Cork, SW Ireland.
Identification by Andy Acton
Thin, waxy thallus, grey, grey-green or brownish. Reddish-brown perithecia, becoming orange and +/- gelatinous when wet. Short-lived, most abundant in winter and early spring.
Ascus with 100-150 spores, mainly 3-septate. Ascospores 12-16 x 4-8 Ám, the ends rounded.
Occurs in shallow cracks and rain tracks on the trunks of mature broad-leaved trees. Often found in association with the liverwort Metzgeria furcata. An 'Old forest' indicator species.
Similar: Pachyphiale carneola
Thelopsis rubella April 2010