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Slime mould spores. Coloured scanning electron micrograph (SEM) of spores (orange) of a Didymium sp. slime mould. The spores are spiny (echinulate). As in most slime moulds, they are associated with a mass of thread-like structures (grey), collectively known as the capillitium. Changing moisture levels cause the threads to move with a wriggling action; this flicks the spores away, helping to disperse them. Slime moulds are not fungi, but a separate group with a variety of complex life cycles. Magnification: x1100 at 6x6cm size.
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