Leptoxyphium Speg., Physis, B. Aires 4: 294 (1918)
Index Fungorum number: IF8762; 17 morphological species (Species Fungorum 2020), 5 species with molecular data.
≡ Caldariomyces Woron., Annls Mycol. 24(3/4): 261 (1926) ≡ Megaloxyphium Cif., Bat. & Nascim., Publicações Inst. Micol. Recife 47: 3 (1956) ≡ Astragoxyphium Bat., Nascim. & Cif., in Batista & Ciferri, Quad. Lab. Crittogam., Pavia 31: 45 (1963)
Saprobic on sugary exudates from insects growing on the surface of living leaves. Thallus of superficial, grey brown to brown, septate, branched mycelium, constricted at the septa, forming an irregular network. Pycnidia superficial, gregarious, arising from aggregated hyphae, base bulbous, comprising parallel hyphae, straight to slightly flexuous, sometimes with helical twisting, comprised of cylindrical hyphae and expanded to become funnel-shaped, capulate at the apex. Conidia ellipsoidal, hyaline, 1-celled, guttulate.
Type species – Leptoxyphium graminum (Pat) Speg., Physis. B. Aires 4: 294 (1918) ≡ Capnodium graminum Pat., J. Bot., Paris 11: 348 (1897).
Importance and role – saprobic
Notes – Leptoxyphium was established by Spegazzini (1918). Members of this genus are sooty moulds and commonly found as asexual morphs. Its pycnidia differ from other genera by a narrow bulbous base, with a cup-like apex, which produces conidia.