page_title: Timeline of Devonian research
section_title: 19th century
hierarchical_section_title: Timeline of Devonian research / 19th century
caption_attribution_description: English: Pterygotus anglicus - giant Eurypterid from Devonian of England
context_page_description: This timeline of Devonian research is a chronological listing of events in the history of geology and paleontology focused on the study of earth during the span of time lasting from 419.2–358.9 million years ago and the legacies of this period in the rock and fossil records.
context_section_description: 1844
  Agassiz described the new genus Pterygotus.
  1859
  Dawson described the new genus Prototaxites .
  1881
  Whiteaves described the new genus Eusthenopteron.
  1889
  Newberry described the new genus Stethacanthus.
  1894
  Dean described the new genus Cladoselache.
caption: Pterygotus.
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