Prostomium
The prostomium (From Ancient Greek, meaning "before the mouth"; plural: prostomia; sometimes also called the "acron") is the cephalized first body segment in an annelid worm's body at the anterior end. It is in front of (but does not include) the mouth, being usually a small shelf- or lip-like extension over the dorsal side of the mouth. The prostomium together with the peristomium, which includes the mouth and pharynx, make up the annelid head.
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Scanning electron micrograph of a newly hatched European nightcrawler (Eisenia hortensis) showing the prostomium
Augenerilepidonotus dictyolepis specimen from Museums Victoria showing the prostomium with notable structures labelled
See also
References
- Rouse, Greg; Pleijel, Frederick (2001). Polychaetes. Oxford: Oxford University Press. ISBN 0198506082.
- Blake, J. A.; Hilbig, B.; Scott, P. H. (1997). Taxonomic atlas of the benthic fauna of the Santa Maria Basin and Western Santa Barbara Channel. Volume 4 - The Annelida part 1. Santa Barbara: Santa Barbara Museum of Natural History. ISBN 9780936494258.
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