archiannelid

9.9

A very small sea worm with no visible body rings that looks like a young worm

noun
/ˌɑrkiˈænəlɪd/

Specialized

: archiannelido

Unlike typical annelids, archiannelids do not show visible segmentation on the outside of their bodies.

Examples

Researchers study archiannelids to learn about the early evolution of segmented worms.
Most archiannelids inhabit sandy marine environments where their small size helps them move between sand grains.
The archiannelid is a fascinating creature.
Many archiannelids are found in marine environments.
Most archiannelids inhabit sandy marine environments where their small size helps them move between sand grains.
Researchers study archiannelids to learn about the early evolution of segmented worms.
Unlike typical annelids, archiannelids do not show visible segmentation on the outside of their bodies.

Surface Forms

archiannelid singular

archiannelids plural

Morphology

archiannelid = annelid (semi-transparent) = archi + annelid

The structure 'archi-' + 'annelid' clearly denotes a primitive or original annelid in scientific terminology, but 'archi-' is a specialized combining form not familiar to average learners.

Etymology

Archiannelid combines archi- meaning 'original' or 'primitive' and annelid, which comes from a root for 'ring' used for ringed worms. So an archiannelid is a very simple, early kind of ringed worm, which fits its small body that has no clear rings on the outside.