Glaziellaceae is a family of fungi in the order Pezizales that contains the single monotypic genus Glaziella. The type species Glaziella vesiculosa, originally collected in Cuba, was referred to the genus Xylaria by Miles Joseph Berkeley and Moses Ashley Curtis in 1869. A decade later, Berkeley circumscribed the genus Glaziella to contain a specimen collected in Brazil, apparently forgetting that he had earlier named it Xylaria aurantiaca.