†Ponumia Hu 1970

Hu 1970. The ontogenies of Ponumia obscura (Lochman) n.g., and of Housia canadensis (Walcott) (Trilobita) from the Upper Cambrian of the Big Horn Mountain, Wyomong [error pro Wyoming]. Trans. Proc. palaeont. Soc. Japan (N.S.), 78 1970: 253-264