Gnathostomulida

Gnathostomulids, or jaw worms, are a small phylum of marine invertebrates which were discovered in 1956.^[1] They are tiny worm-like marine animals. They live in sand and mud beneath shallow coastal waters and can survive in relatively anoxic environments.

1. ↑ ^{1.0 1.1} Ax P. 1956. Die Gnathostomulida, eine rätselhafte Wurmgruppe aus dem Meeressand. Abhandl. Akad. Wiss. u. Lit. Mainz, math. - naturwiss. 8 p1–32