Subgenus
Achatella (Vironiaspis) Jaanusson et Ramsköld, 1993
Selection of related publications
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 (Vironiaspis) kegelensis (Schmidt, 1881) | Keila Stage
2. Achatella (Vironiaspis) kuckersiana (Schmidt, 1881) | Kukruse Stage
3. Achatella (Vironiaspis) nabalaensis Krueger, 2017 | Nabala Stage
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Trilobita | 
| Order | Phacopida | 
| Suborder | Phacopina | 
| Family | Pterygometopidae | 
| Subfamily | Pterygometopinae | 
| Genus | Achatella | 
| Subgenus | (Achatella) | 
| (Vironiaspis) | |
| Species | kegelensis | 
| kuckersiana | |
| nabalaensis |