biarticulate with two-jointed

biramous Having notopodium and neuropodium

branchia a gill, an extension of the body wall which has elements of the blood-vessels.
capillary seta a hair-like bristle but often used to cover  slender tapering setae
clitellum the swollen glandular portion of skin of certain annelids.
compound seta
elytron (elytra)
eversible (proboscis) capable of being extended by turning the inner part outwards
harpoon seta a stout pointed seta with recurved barbs near the tip
hooded seta
hook stout-shafted, blunt, often distally curved and dentate seta; smaller hooks arranged in single or double rows are often referred to as uncini
interrama cirrus a cirriform projection between the notopodium and neuropodium
limbate (seta) a seta with a flattened margin to the blade
lobe major parapodial process, used mainly about flattern kinds, but also more generally about all kinds of major parapodial processes.
occipital antennae antennae on the posterior part of the prostomium
parapodium segmentally projections carrying setae; foot
pectinate comblike;with a series of projections arranged like the teeth of a comb
peristomium first distinct post-prostomial region; strictly including only the region around the mouth, in practice including also segments fused to this structure, forming the posterior part of the recognizable head.

pharynx anterior part of the digestive tract; often eversible, always modified for feeding purposes, sometimes also for burrowing.
polychaete bristle worm, a class of mainly marine annelid worms, characterized by possession of parapodia bearing numerous chaetae
postsetal posterior to the setae
presetal anterior to the setae
proboscis the anterior part of the alimentary canal derived from the stomadaeum which can be everted to project forwards

prostomium anteriormost, a pre-segmental part of the body anterior to the mouth, enclosing at least the anterior to the brain, often with antennae and eyes.

seta secretion from parapodia forming armature.

setiger a segment with setae
simple seta
tentacular cirrus a cirrus arising from the peristomium.

uniramous mostly have reduced notopodium.


Introduction Common Families Identification key Glossary References

Developed by: P. L. Chan     Last modified: 4 April,00