Ptychagnostus
Ptychagnostus
Eukaryota | Animalia | Arthropoda | Artiopoda | Trilobitomorpha | Trilobita | Agnostida | Ptychagnostidae | Ptychagnostus
COL:CS5HF | COL:N | COL:RT | COL:CW2V9 | COL:CW2VB | COL:TRL | COL:NB | COL:6275Z | COL:7567
(Chatton, 1925) Whittaker & Margulis, 1978 |  |  |  |  |  |  | Kobayashi, 1939 | Jaekel, 1909