Article · Wikipedia archive · Last revised Jun 17, 2026

Acicula

Acicula are strong, stout internal chaetae that provide support to parapodia in polychaete annelids.

Last revised

Jun 17, 2026

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≈ 1 min

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Acicula (sing.: aciculum) are strong, stout internal chaetae that provide support to parapodia in polychaete annelids.¹

Microscope photograph of a parapodium from a specimen of Arctonoe sp. showing the internal acicula that support the two lobes of the parapodium. source ↗

References

References

Hutchings, P. A.; Fauchald, K. (2000). Polychaetes and Allies: the Southern Synthesis - Class Polychaeata: Definition and General Description. Melbourne: CSIRO Publishing. pp. 1–3.