Species
Ptychopyge janischewskyi Balashova, 1964
Synonyymit
1964 Ptychopyge janischewskyi Balashova sp. nov. — Balashova , pp. 23, fig. 1:14; 4:8,9
1976 Ptychopyge janischewskyi Balashova, 1964 — Balashova , pp. 30
Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Asaphida |
| Superfamily | Asaphoidea |
| Family | Asaphidae |
| Genus | Ptychopyge |
| Species | angustifrons |
| broeggeri | |
| excavato-zonata | |
| gladiifera | |
| herambensis | |
| janischewskyi | |
| knyrkoi | |
| lesnikovae | |
| minor | |
| rossica | |
| volkhovense |