title: Adelphoceras
text: # Adelphoceras
  
  Adelphoceras is a genus of middle Devonian coiled nautiloids from Europe with an oval whorl section and shallow depressed zone on the inner, dorsal, rim; a strongly contracted T-shaped aperture; ventral siphuncle containing actinosiphonate deposits, and two rows of spines on either side.
  
  Adelphoceras is included in the nautilid family Rutoceratidae, and is also a part of the Tainoceratoidea.
  
  