1. Início
2. Organismos
3. Eukaria
4. Unikonta
5. Opistokonta
6. Animal
7. Eumetazoa
8. Invertebrata
9. Protostomia
10. Ecdysozoa
11. Panarthropoda
12. Arthropoda
13. Chelicerata
14. Merostomata
15. Eurypterida

• TG Merostomata

Eurypterida