Loricifera

Loricifera is a small phylum of marine sediment-dwelling animals with about
a dozen known species. The phylum was discovered in 1983 by marine
biologists. The animals have a head, mouth and digestive system as well as a
set of specialized umbrella skeleton like scales at each end that are used
to move the animals. There is no circulatory system and no endocrine system.
The body cavity is a pseudocoelom with a mouth and an anus. The animals are
bisexual and probably oviparous. They have no fossil record.

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