Fossa

Definition

A depression or hollow area on the exoskeletons or anatomies of arthropods, including insects and arachnids, which can serve various functions such as muscle attachment or articulation points.

Etymology

From Latin 'fossa', meaning 'ditch' or 'trench'.

Example

The fossa on the thorax of the beetle provides an attachment point for muscles.

Synonyms

• Depression
• Cavity

Related Terms

• Exoskeleton
• Anatomical feature
• Articulation

Usage Notes

Fossae vary in size and shape depending on their function and the species in which they are found.