The University of Glasgow uses cookies for analytics. Find out more about our Privacy policy.
Necessary cookies enable core functionality. The website cannot function properly without these cookies, and can only be disabled by changing your browser preferences.
Analytical cookies help us improve our website. We use Google Analytics. All data is anonymised.
Clarity helps us to understand our users’ behaviour by visually representing their clicks, taps and scrolling. All data is anonymised.
Common name: Worms
Name derivation: “ring form”
Number of Orders: 24
Number of Families: 145
Number of Genus: 2,364
Number of known Species: 17,766
Earliest Fossil Record: Cambrian 541 - 485 mya
Habitat: Marine, Terrestrial, Freshwater
Size Range: 0.05 mm to 2.4 m
Notes: Pogonophora and Echiura now included as divisions within Annelida rather than as separate Phyla. Based on Catalogue of Life as of July 2024