Sengoerina argandi, n. gen., n. sp., and its position in the evolution of Late Permian biseriamminid foraminifers


Altiner D.

MICROPALEONTOLOGY, cilt.45, ss.215-220, 1999 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 45 Konu: 2
  • Basım Tarihi: 1999
  • Doi Numarası: 10.2307/1486114
  • Dergi Adı: MICROPALEONTOLOGY
  • Sayfa Sayıları: ss.215-220

Özet

The name Sengoerina is proposed for a new biseriamminid genus characterized by a coiled stage of initially globular to progressively angular, biserial chambers followed by an uncoiled stage of angular, biserial chambers. Unlike Dagmarita, it has a distinct coiled stage and lacks spine-like projections at the outer margins of the chambers. Sengoerina constitutes the root stock of the angular-chambered, dagmaritin-type biseriamminids which evolved from the globivalvulines in the Late Permian.