CAULOCHYTRIUM PROTOSTELIOIDES SP. NOV., A NEW CHYTRID WITH AERIAL SPORANGIA

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Abstract
Caulochytrium is a unique genus of chytrids characterized by the production of both sessile zoosporangia and aerial sporangiocarps, the latter unknown in other chytrids. The type species, C. gloeosporii, is an obligate parasite on conidia of the fungus Gloeosporium. The newly described species, C. protostelioides, which was discovered first in the British West Indies and then in North Carolina, is an obligate parasite of the dematiaceous fungus Cladosporium. It differs from the type species in microdimensions, smaller number of zoospores per aerial sporangium, lack of sexuality, production of protostelid‐like sporangiocarps that do not parasitize the host and which float freely on water, and an unrelated host fungus. The family Caulochytriaceae and genus Caulochytrium are emended.
Funding Information
  • National Science Foundation (DEB 77–12652)

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