Armandia brevis is an undulatory burrowing opheliid polychaete found in surficial heterogeneous sediments (muds) (Dorgan et al., 2013). Its fast, energetic undulatory behavior is superficially similar to undulatory behavior exhibited by nematodes. A. brevis also exhibits swimming behavior, particularly during the spawning phase of its life cycle.
A. brevis has a smooth, rigid body with ventral and lateral grooves extending along the entire elongated body. Internally, A. brevis has longitudinal and oblique muscles, but lacks circular muscles (Clark and Hermans, 1976; Law et al., 2014).
- Dorgan KM, Law CJ, & Rouse GW. 2013. Meandering worms: mechanics of undulatory burrowing in muds. Proceedings of the Royal Society B: Biological Sciences 280:20122948–20122948. doi:10.1016/0022-5193(72)90148-8.
- Hermans CO. 1978. Metamorphosis in the opheliid polychaete Armandia brevis. In Settlement and metamorphosis of marine invertebrate larvae (eds F-S Chia, ME Rice), pp. 113–126. Amsterdam, The Netherlands: Elsevier.
- Law CJ, Dorgan KM, Rouse GW. 2014. Relating divergence in polychaete musculature to different burrowing behaviors: A study using Opheliidae (Annelida). Journal of Morphology. DOI 10.1002/jmor.20237.