Subgenus
Achatella (Achatella) Delo, 1935
Aiheeseen liittyvät julkaisut
Schmidt, Fr. 1881. Revision der ostbaltischen silurischen Trilobiten nebst geognostischer Übersicht des ostbaltischen Silurgebiets. Abt. I. Phacopiden, Cheiruriden und Encrinuriden. Mémoires de l´Académie Impériale des Sciences de St.-Petersbourg 30, 1, 1-237.
List of species
1. Achatella (Achatella) nieszkowskii (Schmidt, 1881) | Rakvere Stage
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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Trilobita |
| Order | Phacopida |
| Suborder | Phacopina |
| Family | Pterygometopidae |
| Subfamily | Pterygometopinae |
| Genus | Achatella |
| Subgenus | (Achatella) |
| Species | nieszkowskii |
| Subgenus | (Vironiaspis) |