False-colour scanning electron micrograph of the predatory nematophagous fungus,Arthrobotrys oligospora,which captures nematode worms using an adhesive net composed of raised loops formed from recurved lateral branches of its hyphae. A number of the loops,used to ensnare the worm,are visible in this picture,along with the delicate- looking adhesive matrix which binds to the surface of the prey. Once the worm has been immobilised death soon follows; precipitated,it is thought,by the action of toxins secreted by the fungus. Finally the fungus pierces the worm with a haustorium,a specialised hypha,and consumes the body contents. Magnification: x360 at 35mm size |