Asterovenatoformes

Asterovenatoformes are the most primitive order of Lagnodactylia. They retain the external appearance of being radially symmetric, even though all species are bilateral internally.

Asterovenatoridae
Primitive, externally radial Asterovenatoformes which lack a thru gut.

Microvenatoridae
Generally very small Asterovenatoformes which mainly prey on cells and have a thru gut.