. . "Animalia"@en . . . . . "Synapsida"@en . . . . . . . . . . . "Orthopus is an extinct genus of non-mammalian synapsids. It is based on a partial humerus that closely resembles Estemmenosuchus, in the limited comparisons possible."@en . . "1220"^^ . . . . . . . . . . . . . . "1051301166"^^ . . . "22439804"^^ . . . . . . . . . . . . "Orthopus"@en . . . . "Orthopus is an extinct genus of non-mammalian synapsids. It is based on a partial humerus that closely resembles Estemmenosuchus, in the limited comparisons possible."@en . . . . "Orthopus"@en . . .