chaeta

Since earthworm tissues usually undergo a complete digestion, their detection in faecal samples is mainly related to the observation of gizzard rings (Bradbury 1977) and chaetae (Kruuk & Parish 1981, Wroot 1985).

Notopodia supported by one acicula and bearing 2-3 long simple chaetae with 10 spines along the margin.

Tubercles and groups of chaetae: Af--antenno--frontal, Cl--clypeal, De--dorsoexternal, Di--dorsointernal, DL--dorsolateral, L--lateral, Oc--ocular, So--subocular.

5-8 heavy spines arranged in a slightly oblique row, alternating with pennoned companion chaetae. Heavy spines falcate, with lateral flange or sheath on concave side, or flange absent (Fig.

All thoracic notopodia with crenulated capillary chaetae, fewer in number than in neuropodia (Fig.

From the lack of any hard structures and accessory morphological features such as chaetae and jaws, there is a systematic difficulty not only in the genus Protodrilus but also in the family Protodrilidae and associated families (Westheide, 1985; Fauchald and Rouse, 1997; Rouse and Fauchald, 1997).

For example, exceptional fossils of the coiled helcionellid Pelagiella preserve chaetae (Thomas et al.

Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin.

Parapodium was separated from polychaete, placed on a slide with a drop of glycerol, and covered with a cover slip and the chaetae were observed under an Olympus compound microscope.

The genus is characterized by long hose-like atria, vestigial vasa deferentia, small or completely lacking prostate glands, and presence (in most species) of simple-pointed and distally grooved, often nib-shaped, spermathecal chaetae (Fig.

Indeed, there are similarities in outline and microstructure to particular extracellular 'tough parts' in living polychaete annelids, including the fans of abdominal chaetae in various sabellids (although the Mount Cap elements are not fused proximally; cf.