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Create the page "Middle Ordovician first appearances" on this wiki! See also the search results found.

• Symphysops
  ...e'', cephalon 24mm long, lateral view, found near Alnif, Morocco, from the Ordovician | fossil_range = {{fossil_range|463|444|Middle to Upper [[Ordovician]]}}
  5 KB (685 words) - 20:56, 27 April 2017
• Sagavia
  | fossil_range = {{fossil_range| 470|444|Middle and Upper Ordovician}} ...rnal|author1= Zhou Zhiyi|author2= Zhou Zhiqiang|year= 2007|title= The Late Ordovician cyclopygid trilobite ''Sagavia'' Koroleva, 1967, from the Pagoda Formation
  4 KB (536 words) - 20:56, 27 April 2017