Gryponichidae was named by Tatarinov (1964). It is not extant. Its type is Gryponyx.
It was synonymized subjectively with Thecodontosauridae by Benedetto (1973); it was synonymized subjectively with Plateosauridae by Heerden (1979); it was synonymized subjectively with Anchisauridae by Steel (1970) and Cooper (1981).
It was synonymized subjectively with Ornithosuchidae by Steel (1970); it was synonymized subjectively with Anchisauridae by Galton (1973) and Heerden (1979).