Uplifted 470 million years ago by the Poaglisis. The giant 3 metre tall arches were found thundering across vast plains of prairie grass.

A row of optical sensors runs along each side of the upper arch. The inner edge next to the ground level has a row of 33 centimeter long cilia. The ribbed area on the underside of the arch appears to be a series of lungs.

Biologically, they seem similar to lichen, possibly as two or three organisms in symbiosis. They are saprophytic, obtaining nutrients from nonliving organic matter. Reproduction is by division.

They have 4 client species, the L'92Thit, the K'8Fu, the J'9Tisiss, and the Voag'8M.

Sources: Contacting Aliens, An Illustrated Guide to David Brin's Uplift Universe,