barrandeoceras造句

• The Barrandeoceratidae are derived from the tarphyceritid genus, " Centrotarphyceras " through " Barrandeoceras " ( Flower 1984 ), and is the source for the Uranoceratidae and Nephriticeratidae.
• According to Flower, 1984, " Plectoceras ", and therefore the Plectoceratidae, is derived from the Tarphyceratid genus " Campbelloceras " while " Barrandeoceras ", and therefore the Barrandeoceratidae, is derived from " Centrotarphyceras ".
• "Plectoceras " and its contemporary " Barrandeoceras " are both likely derived from the Tarphyceratidae; " Plectoceras " with its subventral siphuncle possibly from " Campbelloceras ", " Barrandeoceras " with its subcentral siphuncle possibly from " Centrotarphyceras ".
• "Plectoceras " and its contemporary " Barrandeoceras " are both likely derived from the Tarphyceratidae; " Plectoceras " with its subventral siphuncle possibly from " Campbelloceras ", " Barrandeoceras " with its subcentral siphuncle possibly from " Centrotarphyceras ".