The Early Tithonian (Late Jurassic) ammonite genus Virgatosimoceras Spath (Ammonoidea: Simoceratidae) - revision and value for correlation. Neues Jahrbuch fuer Geologie und Palaeontologie Abhandlungen, 256(2), May 2010: 195-212. 201 [Zoological Record Volume 146]