title: Turrilites costatus
text: # Turrilites costatus
  
  Turrilites (Turrilites) costatus is a species of helically coiled ammonoid cephalopod, from the lower part of the Upper Cretaceous (Cenomanian).
  
  ## Description
  
  The shell of this species can reach a length of about 11 centimetres (4.3 in). It is tightly wound in a high trochospiral, with an acute angle at the apex. Ribs are weak, with rows of strong tubercles.
  
  