Acicula (sg.: aciculum) are strong, stout internal chaetae that provide support to parapodia in polychaete annelids.[1]
![](http://178.128.105.246/cars-http-upload.wikimedia.org/wikipedia/commons/thumb/0/02/Arctonoe_sp._parapodium_with_chaetae_labels.png/660px-Arctonoe_sp._parapodium_with_chaetae_labels.png)
References
edit- ^ Hutchings, P. A.; Fauchald, K. (2000). Polychaetes and Allies: the Southern Synthesis - Class Polychaeata: Definition and General Description. Melbourne: CSIRO Publishing. pp. 1–3.