|
''Perplexiconus'' has become a synonym of Conasprella (Ximeniconus) Emerson & Old, 1962, a subgenus of sea snails, marine gastropod mollusks in the family Conidae, the cone snails and their allies.〔Bouchet, P. (2015). Perplexiconus Tucker & Tenorio, 2009. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=580589 on 2015-03-25〕 In the new classification of the family Conidae by Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015), ''Perplexiconus'' has become a subgenus of ''Conasprella'': ''Conasprella (Ximenoconus)'' Tucker & Tenorio, 2009 represented as ''Conasprella'' Thiele, 1929 〔 ( Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015). ''One, four or 100 genera? A new classification of the cone snails''. Journal of Molluscan Studies. 81: 1-23 ) 〕 ==Distinguishing characteristics== The Tucker & Tenorio 2009 taxonomy distinguishes ''Perplexiconus'' from ''Conus'' in the following ways:〔Tucker J.K. & Tenorio M.J. (2009), Systematic Classification of Recent and Fossil Conoidean Gastropods, ConchBooks, Hankenheim, Germany, 295 pp.〕 * Genus ''Conus'' ''sensu stricto'' Linnaeus, 1758 :: Shell characters (living and fossil species) :::The basic shell shape is conical to elongated conical, has a deep anal notch on the shoulder, a smooth periostracum and a small operculum. The shoulder of the shell is usually nodulose and the protoconch is usually multispiral. Markings often include the presence of tents except for black or white color variants, with the absence of spiral lines of minute tents and textile bars. ::Radular tooth (not known for fossil species) :::The radula has an elongated anterior section with serrations and a large exposed terminating cusp, a non-obvious waist, blade is either small or absent and has a short barb, and lacks a basal spur. ::Geographical distribution :::These species are found in the Indo-Pacific region. ::Feeding habits :::These species eat other gastropods including cones.〔 * Subgenus ''Ximenoconus'' Emerson & Old, 1962 ::Shell characters (living and fossil species) :::The shell is cylindrical in shape with a conical spire and angulate shoulders. The protoconch is either paucispiral or multispiral. The whorl tops do not have cords. Nodules are absent, however the shell may be ornamented with an undulating carina. The posterior notch is moderate to deep, and the anterior notch is well developed. The periostracum is smooth, and the operculum is small. ::Radular tooth (not known for fossil species) :::The anterior section of the radular tooth is shorter than the posterior section, and there is no posterior blade. A posterior fold is present. There is a blunt shaft fold which is blunt at its anterior end. A basal spur is present, and the barb and blade are short. ::Geographical distribution :::The species in this genus occur in the West Atlantic and Eastern Pacific regions. ::Feeding habits :::These cone snails are vermivorous, meaning that thet prey on polychaete worms.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Perplexiconus」の詳細全文を読む スポンサード リンク
|