in the typical mastax of a Brachionus there are two hammer-like bodies (mallei), which work on a kind of split anvil (incus); each malleus consists of an upper part or head (uncus) and a lower or handle (manubrium);.
one of the paired calcareous structures within the mastax of rotifers
الواصلة
one of the paired cal·car·e·ous structures with·in the mas·tax of rotifers