Taxonomic revision and phylogenetic classification of the Late Cretaceous (Upper Santonian-Maastrichtian) serial planktonic foraminifera (family Heterohelicidae Cushman, 1927) with peripheral test wall flexure

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Abstract

Peripheral test wall flexure is developed in an upper Santonian-Maastrichtian lineage of serial planktonic foraminifera (Family Heterohelicidae Cushman, 1927). This lineage consists of two genera, Hendersonia nov. gen. and Paraspiroplecta nov. gen. Hendersonia (Upper Santonian-Campanian) includes three biserial throughout species, namely H. hendersoni nov. sp., H. carinata (Cushman, 1938) and H. jerseyensis nov. sp. This lineage shows the gradual development of the peripheral test wall flexure. Paraspiroplecta (Upper Campanian-Maastrichtian) presents early planispiral coil and weakly developed, probably relict, peripheral test wall flexure.
Original languageEnglish
Pages (from-to)97-114
JournalRevista Española de Micropaleontología
Volume40
Issue number1-2
StatePublished - 2008

Keywords

  • Planktonic foraminifera
  • Santonian-Maastrichtian
  • Taxonomy
  • New genera
  • New species

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