Genus
Achatella Delo, 1935
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 (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
 Loading... 
Classification
| 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 |