Cyclosa is a spider genus in the family Araneidae.

One small species from Guyana

Guyana

Guyana , officially the Co-operative Republic of Guyana, previously the colony of British Guiana, is a sovereign state on the northern coast of South America that is culturally part of the Anglophone Caribbean. Guyana was a former colony of the Dutch and of the British...

 (described under the nomen dubium

Nomen dubium

In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...

C. tremula) has a striking black and white pattern and rests in the center of an orb web with greyish "imitation spiders" it has created from prey remains. If the spider is disturbed, it vibrates its body, so that the black and white patches blur into grey, thus resembling the false spiders.