21. They have isostrophically coiled shells and may be either Gastropoda sea ( snail ) s, or Monoplacophora. 22. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. 23. More recently, J . P . Wager, 2011 included the Bellerophontida as an order in the Gastropoda . 24. This superfamily name is not used in the Taxonomy of the Gastropoda ( Bouchet & Rocroi, 2005 ). 25. Neolepetopsidae belongs to superfamily Neolepetopsoidea according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 ). 26. According to taxonomy of the Gastropoda by Bouchet & Rocroi ( 2005 ) the family Helicostoidae has no subfamilies. 27. According to taxonomy of the Gastropoda by Bouchet & Rocroi ( 2005 ) the family Coelostylinidae has no subfamilies. 28. According to taxonomy of the Gastropoda by Bouchet & Rocroi ( 2005 ) the family Maturifusidae has no subfamilies. 29. Thiele, 1926, as shown in the taxonomy of the Gastropoda by Bouchet & Rocroi ( 2005 ). 30. But he knows more about mollusca gastropoda strombidae strombus gigas _ the Queen Conch _ than most of the natives.