Class
Arachnida Lamarck, 1801
spiders
Selection of related publications
Thorell, T., Lindström, G. 1885. On a Silurian scorpion from Gotland.  Kungliga Svenska Vetenskapsakademiens Handlingar   21,   9,   1-33.
List of species
1. Palaeophonus nuncius Thorell et Lindström, 1884 | Wenlock
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Chelicerata | 
| Superclass | Euchelicerata | 
| Class | Arachnida | 
| Order | Scorpiones | 
| Class | Merostomata | 
| Pycnogonida | |
| Xiphosura | |
| Order | Eurypterida |