Formonsella pyramidosa (Haptophyta, Papposphaeraceae): A new weakly calcified coccolithophore genus from warm-water regions

Helge Abildhauge Thomsen, Lluïsa Cros, Elisa Malinverno, Jette B. Ostergaard, Mara Y. Cortés, Markus Geisen, Jeremy R. Young

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A new species Formonsella pyramidosa gen. et sp. nov. is described to accommodate a widely distributed warm-water coccolithophore species that has previously been referred to as Pappomonas sp. 2. Formonsella differs from Pappomonas with respect to, in particular, the detailed structure of the rim on both calicate and non-calicate coccoliths. In Formonsella the rim comprises two cycles of rod-shaped elements. Although elements in the distal layer are higher at one end, giving this cycle a serrate outline, the overall appearance is very different from the Pappomonas rim which encompasses a distal cycle of pentagonal elements, giving the rim a very distinct toothed appearance. Inverted rectangular pyramidal structures terminate the calicate F. pyramidosa coccoliths. In non-calicate coccoliths the central area calcification comprises differently sized tile-shaped elements, mostly arranged along the longitudinal axis in a rather irregular way.
Original languageEnglish
JournalJournal of Micropalaeontology
Volume35
Issue number2
Pages (from-to)125-132
ISSN0262-821X
DOIs
Publication statusPublished - 2016

Keywords

  • Paleontology
  • coccolithophore
  • Formonsella gen. nov.
  • Papposphaeraceae
  • SEM
  • TEM
  • Haptophyceae

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