Genus
Hydrocephalus Barrande, 1846
Selection of related publications
Rushton, A., Weidner, T., Ebbestad, J. 2016. Paradoxidid trilobites from a mid-Cambrian (Series 3, stage 5) limestone concretion from Jämtland, central Sweden.  Bulletin of Geosciences   91,   3,   515-552. DOI:10.3140/bull.geosci.1606
Rushton, A. W. A., Weidner, T. 2007. The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden.  Acta Geologica Polonica   57,   4,   391-401.
List of species
2. Hydrocephalus vikensis Rushton et Weidner, 2007 | Cambrian
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Klassificering
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Arthropoda | 
| Subphylum | Trilobita | 
| Order | Redlichiida | 
| Suborder | Redlichiina | 
| Superfamily | Paradoxidoidea | 
| Family | Paradoxididae | 
| Genus | Acadoparadoxides | 
| Eccaparadoxides | |
| Hydrocephalus | |
| Species | hicksii | 
| spinulosus | |
| vikensis | |
| Genus | Mawddachites | 
| Paradoxides |