The Late Permian araxoceratid ammonoids: a case of repetitive temporal and spatial unfolding of homoplastic conch characters
作者: Dieter KornAbbas Ghaderi
刊名: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, 2019, Vol.292 (3), pp.339-350
来源数据库: Schweizerbart Journal
DOI: 10.1127/njgpa/2019/0826
关键词: PermianWuchiapingianAmmonoideaIranConch morphology
原始语种摘要: The Wuchiapingian (early Late Permian) ammonoid family Araxoceratidae shows a morphological spectrum that is recurring in the three genera Araxoceras (early Wuchiapingian; Transcaucasus-Iran), Vedioceras (late Wuchiapingian; Transcaucasus-Iran) and Konglingites plus Kiangsiceras (late Wuchiapingian; South China). All three display a range of conch morphology from millstone-shaped to reel-shaped; they also repeatedly show the formation of a tricarinate venter. When the suture line is regarded as the main character for phylogenetic relationships in this group, these conch characters must be seen homoplastic because they iteratively formed in time and space. From the Wuchiapingian sedimentary rocks of NW Iran, three new species of araxoceratid ammonoids are described herein: Araxoceras...
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关键词翻译
关键词翻译
  • homoplastic 同型的
  • Permian 二叠纪
  • temporal 现世的
  • conch 海螺
  • unfolding 展开
  • repetitive 重复
  • morphology 形态学
  • spatial 空间的