Annulus (zoology)

In zoology, an annulus is an external circular ring. ^[1]

4 relations: Annelid, Dendrochronology, Earthworm, Leech.

Annelid

The annelids (Annelida, from Latin anellus, "little ring"), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.

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Dendrochronology

Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed in order to analyze atmospheric conditions during different periods in history.

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Earthworm

An earthworm is a tube-shaped, segmented worm found in the phylum Annelida.

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Leech

Leeches are segmented parasitic or predatory worm-like animals that belong to the phylum Annelida and comprise the subclass Hirudinea.

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References

[1] https://en.wikipedia.org/wiki/Annulus_(zoology)

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