†Paradoxides (Hydrocephalus) Barrande 1846 (trilobite)
Artiopoda - Redlichiida - Paradoxididae
Alternative spelling: Hydrocephalus
Synonyms: Paradoxides (Eoparadoxides) Solov''yev 1969, Rejkocephalus Kordule 1990
Parent taxon: Paradoxides according to T. P. Fletcher et al. 2005
See also Jell and Adrain 2002, Sepkoski 2002 and Whittington et al. 1997
Sister taxa: Paradoxides (Eccaparadoxides), Paradoxides (Mawddachites), Paradoxides abenacus, Paradoxides forchhammeri, Paradoxides gracilis, Paradoxides paradoxissimus, Paradoxides pinus, Paradoxides sjogreni
Subtaxa: Hydrocephalus carens Hydrocephalus vikensis Paradoxides (Hydrocephalus) harlani
Ecology: fast-moving low-level epifaunal carnivore
Distribution: