page_title: Ctenopterus
section_title: Description
hierarchical_section_title: Ctenopterus / Description
caption_attribution_description: Ctenopterus (Stylonurus) cestrotus 1-7, Stylonurus sp. 8, Mixopterus (Stylonurus) multispinosus 9-10. The Eurypterida of New York. Volume 2. New York State Museum Memoir 14, plate 50
context_page_description: Ctenopterus is a genus of prehistoric eurypterid of the family Stylonuridae. It contains only one species, Ctenopterus cestrotus from the Early Silurian of Otisville, New York.
context_section_description: Stylonurids, which lived from the Ordovician to Lower Permian periods, were small to very large forms with scales developing into tubercules and knobs.  The prosoma (head) exhibited variable shape, with arcuate compound eyes located subcentrally, or anteriorly.  Their abdomens were slender.  Their walking legs were long and powerful, sometimes characterized by spines.  Most genera did not have swimming legs.
  Ctenopterus is distinguished by its prosoma (head), which narrows towards the front.  All of its legs are walking legs; the second and third pairs are strongly developed, with a double row of numerous flat spines; the last pair is long, without spines.  Ctenopterus dates from the Silurian period.
caption: Elements of Ctenopterus (1-7)
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