Novel heterococcolithophores, holococcolithophores and life cycle combinations from the families Syracosphaeraceae and Papposphaeraceae and the genus Florisphaera

Sabine Keuter, Jeremy R. Young*, Gil Koplovitz, Adriana Zingone, Miguel J. Frada*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Coccolithophores are a diverse group of calcifying phytoplankton, which are responsible for a large part of the modern oceanic carbonate production. Here, we describe novel or poorly known coccolithophores and novel life cycle combination coccospheres detected in samples collected either in the Gulf of Aqaba in the northern Red Sea or in the Gulf of Naples in the western Mediterranean. These include Syracosphaera winteri, for which detached coccoliths have previously been recorded but both a formal description and taxonomic affiliation were lacking, and five undescribed sets of combination cells linking HET and HOL forms for S. pulchra, S. mediterranea, S. azureaplaneta, S. lamina and S. orbicula. We also propose the replacement name S. kareniae for the fossil species Deutschlandia gaarderae. We describe a new species of the genus Ophiaster, O. macrospinus, displaying a unique morphological and ecological distribution as well as putative combination cells of two variants of the deep-dwelling Florisphaera profunda, which provide new insights on the affiliation of this genus within the Calcihaptophycideae. Additionally, in the family Papposphaeraceae we detected a new species, Pappomonas vexillata, and combination cells of Picarola margalefi and of a species resembling Papposphaera arctica. Finally, we detected three novel, unpaired holococcolithophore forms (Calyptrosphaera lluisae, Calicasphaera bipora and one form designated as Holococcolithophore A). Overall, this set of novel observations and ensuing discussions provide further insights into the diversity, evolution and life cycle complexity of coccolithophores in the oceans.

Original languageAmerican English
Pages (from-to)75-99
Number of pages25
JournalJournal of Micropalaeontology
Volume40
Issue number2
DOIs
StatePublished - 18 Aug 2021

Bibliographical note

Funding Information:
This work was supported by the Israel Science Foundation under grant nos. 1236/16 and 1238/16, both attributed to Miguel J. Frada, and by the European Union's Horizon 2020 research and innovation program under grant agreement no. 730984 (ASSEMBLE Plus project), attributed to Sabine Keuter and Adriana Zingone.

Funding Information:
Financial support. This work was supported by the Israel Science Foundation under grant nos. 1236/16 and 1238/16, both attributed to Miguel J. Frada, and by the European Union’s Horizon 2020 research and innovation program under grant agreement no. 730984 (ASSEMBLE Plus project), attributed to Sabine Keuter and Adriana Zingone.

Publisher Copyright:
© 2021 Sabine Keuter et al.

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