Papposphaera heldalii sp nov (Haptophyta, Papposphaeraceae) from Svalbard

In an attempt to establish a taxonomy for the polar contingent of lightly calcified coccolithophores, we are currently dealing with species of Papposphaera. Here we describe a new species, Papposphaera heldalii sp. nov., based on material from Svalbard. The species is unique in terms of calyx design...

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Bibliographic Details
Main Authors: Thomsen, Helge Abildhauge, Egge, Jorun Karin
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
Agricultural and Biological Sciences (all)
P. heldalii sp. nov
Papposphaera
Papposphaeraceae
Scanning electron microscopy
Svalbard
MICROBIOLOGY
COCCOLITHOPHORIDS
WATERS
P. heldalii sp nov.
Arctic
Online Access:https://orbit.dtu.dk/en/publications/9a642178-f5cb-4ec9-8767-79734b45b7dd
https://doi.org/10.4467/16890027AP.16.004.4045
https://backend.orbit.dtu.dk/ws/files/122357327/Publishers_version.pdf
Description
Summary:In an attempt to establish a taxonomy for the polar contingent of lightly calcified coccolithophores, we are currently dealing with species of Papposphaera. Here we describe a new species, Papposphaera heldalii sp. nov., based on material from Svalbard. The species is unique in terms of calyx design, which is an elegant modification of the standard P. sagittifera theme, and also in terms of the absence of central area calcification in body coccoliths. The species thus occupies a further step in a sequence of five Arctic forms ranging from P. sagittifera via P. sarion, P. arctica and P. iugifera to P. heldalii showing a gradual reduction of central area calcification in body coccoliths. P. heldalii is unique also in the sense that the species has not been found during any of the major Arctic TEM nanoplankton surveys conducted during the last decades.

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