Video clips

Ptygura 1

Ptygura 1
Play video:

Ptygura - Wheel animal anchored to the aquatic plant Myriophyllum and living in a self-built tube. Wheel animals are highly specialised species of Nemathelminthae.

A crown of circular moving cilia gives the impression of a rotating wheel.

Ptygura 2

Ptygura 2
Play video:

Ptygura pilula - Wheel of cilia in perfection: chewing apparatus continuously grinding the food whirled into the tube by cilia.

Its ingenious combination of muscles and complicated tiny levers is a master piece of "fine adjustment in nature". Different species can be identified by their chewing apparatuses.