Ascosphaera callicarpa, a New Species of Bee-Loving Fungus, with a Key to the Genus for Europe
Figure 4
Light microphotographs of Ascosphaera aggregata and A. proliperda.
Ascosphaera aggregata A) ascopores. B) culture on V8 agar medium showing pale buff mycelium.; A. proliperda C) ascospores. D) culture on SDA showing white mycelium and scattered black spore cysts. E–F) bee larvae with chalkbrood caused by A. aggregata. E) fresh Chelostoma florisomne cadaver showing mature (black) and immature (white) spore cysts below the cuticle. F) dry Osmia bicornis larva swollen from fungal growth and spore cyst production below the cuticle. G) aerial hyphae and spore cysts on bee larva with chalkbrood caused by A. proliperda. A, photographed from A.A. Wynns 5144; B from A.A. Wynns 5162; C from A.A. Wynns 5055. Scale bars: A = 10 µm, B = 2 cm, C = 5 µm, D = 825 µm, E = 2 mm, F = 1 mm, G = 2 mm.