title: Biceratopsidae
text: # Biceratopsidae
  
  Biceratopsidae is an extinct family of redlichiid trilobites, with species of small to average size. Species of belonging to this family lived during the Toyonian stage (Olenellus-zone), 522–513 million years ago, in the former continent of Laurentia, including what are today the south-western United States and Canada. It contains the subfamilies Biceratopsinae and Bristoliinae.
  
  ## Habitat
  
  The Biceratopsidae were probably marine bottom dweller, like all Olenellina.
  
  