Choanephora species comprise a very small proportion of the fungal biota and may be more common in the southeastern areas of the United States. Two species are placed by some taxonomists into Blakeslea. No information is available regarding health effects, or toxicity. Allergenicity has not been studied. Rarely found but may be identified on surfaces by tape lifts, tease mounts from bulk samples, and in air by culturable (Andersen) and spore trap samples. (Spores have distinctive morphology.) Natural habitat includes soil and plants in tropical and semitropical regions.