| 词条 | Hydrocephalus (trilobite) | ||
| 释义 |
| fossil_range = {{fossil range|Middle Cambrian}} | name = Hydrocephalus |image = Trilobites - Hydrocephalus carens.JPG |image_width = 240px |image_caption = Hydrocephalus carens at the National Museum (Prague) | regnum = Animalia | phylum = Arthropoda | classis = Trilobita | ordo = Redlichiida | subordo = Redlichiina | familia = Paradoxididae | genus = Hydrocephalus | genus_authority = Barrande, 1846 | synonyms = Phlysacium Hawle et Corda, 1847 Rejkocephalus Kordule, 1990 | subdivision_ranks = species | subdivision ={{Specieslist |H. carens|Barrande, 1846 (type) |H. lyelli|(Barrande, 1852) = Rejkocephalus lyelli |H. mandiki|Kordule, 1990 |H. minor|(Boeck, 1827) = Trilobites minor |H. paradoxum|(Hawle et Corda, 1847) = Paradoxides paradoxum |H. rotundatus|(Barrande, 1846) = Paradoxides rotundatus, Rejkocephalus rotundatus |H. spinulosus|Rushton, Weidner & Ebbestad, 2016 |H. vikensis|Rushton & Weidner, 2007[1] }} }}Hydrocephalus ("water head") is an extinct genus of redlichiid trilobite that was very common during the Middle Cambrian of Eurasia and North America, which lasted from 508 to 497 million years ago. This trilobite is up to 20 cm long and more widely built than others of the time. In comparison to other members of its family, its glabella appears swollen. GalleryReferences1. ^{{cite journal|last1= Rushton|first1= A.W.A.|last2= Weidner|first2= T.|year= 2007|title= The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden|journal= Acta Geologica Polonica|volume= 57|issue= 4|pages= 391–401|url= http://agp.org.pl/table/pdf/57-4/rushton.pdf|accessdate= 30 March 2013}} {{Wikispecies|Hydrocephalus}}{{Portal|Paleontology}}{{Taxonbar|from=Q1056720}}{{redlichiida-stub}} 7 : Redlichiida genera|Cambrian trilobites|Paradoxidoidea|Fossils of the Czech Republic|Fossils of Sweden|Fossil taxa described in 1846|Taxa named by Joachim Barrande |
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