Anal tubercle
- Pronunciation
- /AY-nul TOO-ber-kul/
- Category
- Anatomy
- Singular
- Anal tubercle
- Plural
- Anal tubercles
Definition
A small, often pointed protrusion near the anus of certain juvenile insects and arachnids, which can aid in locomotion or serve sensory functions.
Etymology
From Latin 'anus', meaning 'ring' or 'anus', and 'tuberculum', meaning 'small swelling' or 'nodule'.
Example
The anal tubercle of a spiderling helps it anchor itself with silk threads during its early stages of development.
Synonyms
- Anal bump
- Anal swelling
Related Terms
- Prolegs
- Setae
- Spinnerets
Usage Notes
Anal tubercles may vary in prominence and function depending on the species; they are more pronounced in some larvae and juvenile stages.