ABSTRACT: Five new species of Lasiosphaeria are described and illustrated on material from southwestern France, i.e., L. capitata, L. pallida, L. rufa, L. vestita and L. volvestriana. Eight other species, i.e., L. breviseta, L. caudata, L. immersa, L. moseri, L. munkii, L. punctata, L. pyramidata and L. stuppea are recorded from France for the first time, of which L. punctata, L. pyramidata and L. stuppea are described in detail. New French records of L. porifera are given.

KEYWORDS: Ascomycotina, Sordariales, Lasiosphaeriaceae, wood-inhabiting fungi, systematics

NOMENCLATURAL NOVELTIES:
Lasiosphaeria capitata Cand., J. Fourn. & Magni, p. 212
Lasiosphaeria pallida Cand., J. Fourn. & Magni, p. 215
Lasiosphaeria rufa Cand., J. Fourn. & Magni, p. 222
Lasiosphaeria vestita Cand., J. Fourn. & Magni, p. 228
Lasiosphaeria volvestriana Cand., J. Fourn. & Magni, p. 230