What is "hyperokynodon"

Hyperokynodon is an extinct genus of trematosaurian temnospondyl within the family Trematosauridae. Fossils have been found in Germany. While most trematosaurids existed during the Early Triassic, Hyperokynodon has been found in Late Triassic deposits, making it the youngest known trematosaurid. Hyperokyodon was known since 1852, but it was not identified as a trematosaurid until 1987. The type and only species is H. keuperinus.