Paleontology

Geologic time	:	Early Cambrian - Present	Ref: L. Margulis & K.V. Schwartz, 1982: 208
Geologic age	:	543 Mya - 0 ya	Ref: W.F. Ponder & D.R. Lindberg, 2008: 1

Geography

Distribution	:	Cosmopolitan
Geographic region	:	Africa
Geographic region	:	Antarctic Region
Geographic region	:	Arctic Region
Geographic region	:	Astrakhan'
Geographic region	:	Atlantic Ocean
Geographic region	:	Australian Region
Geographic region	:	Caribbean
Geographic region	:	Central America
Geographic region	:	Europe
Geographic region	:	Indian Ocean
Geographic region	:	North America
Geographic region	:	Pacific Ocean

Ecology

Nutritional category

:

Herbivore

Ecology/Habitat

Habitat	:	Freshwater
Habitat	:	Marine
Habitat	:	Terrestrial

Ecology/Strategies

Feeding strategy	:	Deposit feeding
Feeding strategy	:	Predation
Feeding strategy	:	Scavenging
Feeding strategy	:	Suspension feeding