Genus
Achatella Delo, 1935
Aiheeseen liittyvät julkaisut
Jaanusson, V., Ramsköld, L. 1993. Pterygometopine trilobites from the Ordovician of Baltoscandia. Palaeontology 36, 4, 743-769.
Öpik, A. 1925. Beiträge zur Kenntnis der Kukruse-(C2-) Stufe in Eesti. I. Acta et Commentationes Universitatis Tartuensis VIII, 5, 1-18. G. Mattiesen.
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
2. Achatella (Vironiaspis) kegelensis (Schmidt, 1881) | Keila Stage
3. Achatella (Vironiaspis) kuckersiana (Schmidt, 1881) | Kukruse Stage
4. Achatella (Vironiaspis) nabalaensis Krueger, 2017 | Nabala 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) |
| (Vironiaspis) | |
| Genus | Estoniops |
| Ingriops | |
| Keilapyge | |
| Oelandiops | |
| Pterygometopus | |
| Ruegenometopus | |
| Upplandiops |