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Ascosphaera callicarpa
''Ascosphaera callicarpa'' is a fungus common on the larval feces of the solitary bee ''Chelostoma florisomne'', which nests in the Phragmites reeds of thatched roofs in Europe.
Pathogenic ''Ascosphaera'' species afflict only the larval stage of bees. Typically, diseased larvae die in the larval stage; in rare occurrences, however, larvae have been observed to enter pupation before being overcome by the fungus.
==Description==
The mating system is heterothallic. Infected larvae appear shrunken, pale buff, covered by a weft of hyphae, with or without the production of ascomata. The ascomata are greenish (immature) to black (mature) spore cysts produced on aerial hyphae above the larval cuticle, measuring 40–119 µm in diameter. The spore wall is pale greenish to yellowish-brown, nearly smooth with minute punctae at high magnification. Spore balls are hyaline to pale yellowish, without granules, 7–20 µm in diameter, and mostly persistent. The ascospores are ellipsoid to somewhat sausage shaped, and measure 2.1–3.9 by 1.1–1.7 µm. Cultures grown on Sabouraud dextrose agar show rapid growth after 2–6 days; they are white with abundant production of spore cysts when both mating strains are present.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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