What is "cladophlebis"

Cladophlebis is an extinct genus of fern which grew during the late Paleozoic and Mesozoic eras . It was a common plant during that time in both the northern and southern hemispheres, and belonged to the order of plants called Filicales.

There were many species of Cladophlebis, including: C. akhtashensis, C. arctica, C. browniana, C. denticulata, C. dunberi, C. haiburnensis, C. heterophylla, C. hirta, C. impressa, C. kurtzi, C. lobifolia, C. nebbensis, C. patagonica, C. phlebopteris, C. porsildi, C. readi, C. remota, C. roessertii, C. septentrionalis, C. simplicima, C. spectabilis, C. tenuis, C. wyomingensis, and C. yanschinii.