Image of the Month
Zygospore of the desmid Staurodesmus
by Mike Dingley, Australia

This is a picture of two desmids (Staurodesmus sp.) which have come together to produce a zygospore. A zygospore is formed after sexually reproducing (conjugation) and changes into new desmids when conditions are favourable. The two empty cells (each one has two semi-cells) can be seen to the left and right of the zygospore. The picture was taken on a Nikon Optiphot 2 microscope using a Nikon UFX-DX camera, Fujichrome 50 film, 40X plan apo objective, 5X photoeyepiece and with an intermediate drawing tube giving a magnification of 1.25X. The image was transferred to a Kodak CD.

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