Asterbranchia

Asterbranchia are an order of Lagnodactylia which are distinguished by their large, showy gills derived from their lateral and raptorial arms.

Asterbranchidae
Primitive Asterbranchia which have large gills and long thick anal arms with tentacle-like anal fingers.

Astervermidae
Superficially earthworm-like Asterbranchia which have their gills fused with their bodies.