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Didymoceras

Didimokeralar
Vaqtinchalik diapazon: Yuqori Kampanian
Didymoceras turlari.JPG
Rassomning qayta tiklanishi D. stevensoni, D. nebrasensisva D. cheennese
Ilmiy tasnif
Qirollik:
Animalia
Filum:
Molluska
Sinf:
Tsefalopoda
Subklass:
†Ammonoida
Suborder:
†Ankilotseratina
Superfamily:
†Turrilitoidea
Oila:
†Nostoceratidae?
Tur:
†Didimokeralar

Hyatt, 1894
Turlar

Matnni ko'ring

Sinonimlar
  • Sirroceralar Konrad, 1866 yil
  • Helicoceras d'Orbigny, 1842 yil
  • Helicoceras Uitfild, 1877 yil
  • Emperoceras Hyatt, 1894 yil
  • Dimetoseratoidlar Kennedi va Kobban, 1993 yil

Didimokeralar yo'q bo'lib ketgan tur ning ammonit sefalopod dan Kechki bo'r davr (taxminan 76 mln.). Bu eng g'alati shakldagi avlodlardan biri bo'lib, qobig'i yuqoriga qarab bo'shashgan va ilmoqli uchiga aylanadi. U vertikal ravishda yuqoriga va pastga qarab harakatlanib, suvda suzib ketgan deb o'ylashadi. Umumiy ism lotincha "juftlashgan shoxlar" degan ma'noni anglatadi.

Uning taksonomik joyi tez-tez o'zgarib turadi, ikkalasiga ham joylashtiriladi Turrilitidae, Nostoceratidaeyoki o'z oilasi, Didymoceratidae. Turga kiritilgan turlar quyidagilar:[1]

  • Didymoceras angulatum (Meek va Hayden, 1860)
  • Didymoceras binodosum Kennedi va Kobban, 1993 yil
  • Didymoceras californicum Anderson, 1958 yil
  • Didymoceras cheyenense (Meek va Hayden, 1856)
  • Didymoceras cheyennense (Meek va Hayden, 1856)
  • Didymoceras kokleatus (Meek va Hayden, 1858)
  • Didymoceras hidakense Shigeta yilda Shigeta va boshq., 2016
  • Didymoceras hornbyense (Whiteaves, 1876)
  • Didymoceras navarroensis (Shumard, 1861)
  • Didymoceras nebrascense Meek va Hayden, 1856)
  • Didymoceras newtoni (Uitfild, 1877)
  • Didymoceras nicolletii (Hall va Meek, 1856)
  • Didymoceras platycostatum Kennedi va Kobban, 1993 yil
  • Didymoceras stevensoni (Uitfild, 1877)
  • Didymoceras subtuberculatum Xovart, 1965 yil
  • Didymoceras tenuicostatus (Meek va Hayden, 1858)
  • Didymoceras tortus (Meek va Hayden, 1858)
  • Didymoceras tricostatus (Uitfild, 1897)
  • Didymoceras umbilikatu (Meek va Hayden, 1858)
  • Didymoceras uncus (Meek va Hayden, 1858)
  • Didymoceras vespertinus (Konrad, 1874)

Adabiyotlar

  1. ^ "Didimokeralar Hyatt 1900 ". Paleobiologiya ma'lumotlar bazasi. Olingan 21 fevral, 2012.