There are over 22,000 living annelid species, ranging in size from microscopic to the Australian giant Gippsland earthworm अधिक देखें

Segmentation
In addition to Sipuncula and Echiura, also lineages like Lobatocerebrum, Diurodrilus and Polygordius have lost their segmentation, … अधिक देखें

Earthworms make a significant contribution to soil fertility. The rear end of the Palolo worm, a marine polychaete that tunnels through coral, detaches in order to spawn at the surface, and the people of Samoa regard these spawning modules as a delicacy. अधिक देखें

• Media related to Annelida at Wikimedia Commons
• Data related to Annelida at Wikispecies अधिक देखें

No single feature distinguishes Annelids from other invertebrate phyla, but they have a distinctive combination of features. Their bodies … अधिक देखें

Charles Darwin's book The Formation of Vegetable Mould Through the Action of Worms (1881) presented the first scientific analysis of … अधिक देखें

Fossil record
Since annelids are soft-bodied, their fossils are rare. Polychaetes' fossil record consists mainly of the jaws that some species had … अधिक देखें