Subphylum
Chelicerata Heymons, 1901
Chelicerates
Selection of related publications
Meidla, T., Tinn, O., Männik, P. 2024. Stop 13: Soeginina cliff.  XI Baltic Stratigraphical Conference. Abstracts and Field Guide, pp. 123-125.   Geological Society of Estonia. 
Lamsdell, J. C. 2013. Revised systematics of Palaeozoic ‘horseshoe crabs’ and the myth of monophyletic Xiphosura.  Zoological Journal of the Linnean Society   167,   1,   1-27. DOI:10.1111/j.1096-3642.2012.00874.x
Tetlie, O. E. 2007. Distribution and dispersal history of Eurypterida (Chelicerata).  Palaeogeography, Palaeoclimatology, Palaeoecology   252,      557-574. DOI:10.1016/j.palaeo.2007.05.011
Tetlie, O. Erik 2006. Two new Silurian species of Erypterus (Chelicerata: Erypterida) from Norway and Canada and the phylogeny of the genus.  Journal of Systematic Palaeontology   4,   4,   397-412. DOI:10.1017/S147720190600192
Waloszek, D., Dunlop, J. A. 2002. A Larval Sea Spider (Arthropoda: Pycnogonida) from the Upper Cambrian 'orsten' of Sweden, and the Phylogenetic Position of Pycnogonids.  Palaeontology   45,   3,   421-446. DOI:10.1111/1475-4983.00244
Tetlie, O. E. 2002. A new Baltoeurypterus (Eurypterida: Cheliverata) from the Wenlock of Norway.  Norsk Geologisk Tidsskrift   82,   1,   37-44.
Kjellesvig-Waering, E. N. 1964. A synopsis of the Family Pterygotidae Clarke and Ruedemann 1912 (Eurypterida).  Journal of Paleontology   38,      331–361.
Størmer, L 1934. Merostomata from the Downtonian sandstone of Ringerike, Norway.  Skrifter Norske Videnskaps-Akad. Oslo   10,      1-125.
Bekker, H. 1925. Lühike ülevaade Eesti geoloogiast (Eozoiline ja paleozoiline ladekond).  Eesti Loodus. Äratrükk koguteosest "Eesti", pp. 31-61. 
Jackson, R. T. 1906. A new species of Fossil Limulus from the Jurassic of Sweden.  Arkiv För Zoologi   3,   11,   1-7.
Thorell, T., Lindström, G. 1885. On a Silurian scorpion from Gotland.  Kungliga Svenska Vetenskapsakademiens Handlingar   21,   9,   1-33.
Nieszkowski, J. 1859. Zusätze zur Monographie der Trilobiten der Ostseeprovinzen, nebst der Beschreibung einiger neuen obersilurischen Crustaceen.  Archiv für die Naturkunde Liv-, Ehst- und Kurlands   2,   2,   345-384.
List of species
1. Brachyopterella pentagonalis (Størmer, 1934) | Wenlock
2. Bunodes lunula Eichwald, 1854 | Rootsiküla Stage
3. Bunodes rugosus Nieszkowski, 1859 | Rootsiküla Stage
4. Cambropycnogon klausmuelleri Waloszek et Dunlop, 2002 | Upper Cambrian (old nomenclature)
5. Dolichopterus gotlandicus Kjellesvig-Waering, 1979 | Wenlock
6. Erettopterus carinatus Kjellesvig-Waering, 1979 | Wenlock
7. Erettopterus holmi (Størmer, 1934) | Wenlock
8. Erettopterus laticauda Schmidt, 1883 | Ludlow
9. Erettopterus osiliensis (Schmidt, 1883) | Ludlow
10. Erieopterus laticeps (Schmidt, 1883) | Wenlock
11. Eurypterus hankeni Tetlie, 2006 | Wenlock
12. Eurypterus henningsmoeni (Tetlie, 2002) | Wenlock
13. Eurypterus serratus (Jones et Woodward, 1888) | Wenlock
15. Exapinurus schrenkii (Nieszkowski, 1859) | Rootsiküla Stage
16. Eysyslopterus patteni (Størmer, 1934) | Rootsiküla Stage
17. Holmipterus suecicus Kjellesvig-Waering, 1979 | Wenlock
19. Limulus nathorsti Jackson, 1906, nomen dubium | Jurassic
20. Mixopterus kiaeri Størmer, 1934 | Wenlock
 Loading... 
Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | incertae sedis | 
| Chelicerata | |
| Superclass | Euchelicerata | 
| Class | Arachnida | 
| Merostomata | |
| Pycnogonida | |
| Xiphosura | |
| Order | Eurypterida | 
| Subphylum | Crustacea | 
| Trilobita | |
| Class | Insecta | 
| Merostomoidea | |
| Infraclass | Phosphatocopina | 
| Order | Agnostida | 
| Leperditicopida | |
| Nektaspida | |
| Species | Gdowia |