Ambrosiella

Ambrosiella is a genus of ambrosia fungi within the family Ceratocystidaceae. It was circumscribed by mycologists Josef Adolph von Arx and Grégoire L. Hennebert in 1965 with Ambrosiella xylebori as the type species. All Ambrosiella species are obligate symbionts of ambrosia beetles. Several former species were moved to Raffaelea, Hyalorhinocladiella, or Phialophoropsis and there are nine species recognized as of 2017. One species, Ambrosiella cleistominuta, has been observed to produce a fertile sexual state with cleistothecious ascomata. Ambrosiella in Index Fungorum