Class
Arachnida Lamarck, 1801
hämähäkkieläimet
Aiheeseen liittyvät julkaisut
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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Luokittelu
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Arthropoda |
| Subphylum | Chelicerata |
| Superclass | Euchelicerata |
| Class | Arachnida |
| Order | Scorpiones |
| Class | Merostomata |
| Pycnogonida | |
| Xiphosura | |
| Order | Eurypterida |