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Trochosira polychaeta: a colonial diatom from the late Cretaceous exhibiting two contrasting chain-linking mechanisms and a wide range of preservation

Trochosira polychaeta: a colonial diatom from the late Cretaceous exhibiting two contrasting chain-linking mechanisms and a wide range of preservation
Trochosira polychaeta: a colonial diatom from the late Cretaceous exhibiting two contrasting chain-linking mechanisms and a wide range of preservation
The fossil species Trochosira polychaeta Strelnikova, exhibits a wide range of preservational states that has led to contrasting interpretations with regard to its resting stage or vegetative cell status. Within shallow-buried, well preserved diatomites from the Alpha Ridge of the Arctic Ocean, a continuum of dissolution effects are documented and a vegetative cell status is clearly indicated. The chains are formed by a central linking process but complex marginal structures also constitute a complementary linking mechanism. The double linkage may have supported the integrity of the colonial chains and provided a mechanism for enhanced nutrient uptake. The presence of two distinct types of linking might also represent a stage in a transition from the Cretaceous when central linking structures were common, through the Cenozoic to the modern with more common linking through marginal structures.
trochosira polychaeta, cretaceous, diatoms, dissolution, chain linkage, transitional form
0269-249X
151-162
Kemp, Alan E.S.
131b479e-c2c4-47ae-abe1-ad968490960e
Davies, Andrew
dc4a10da-d700-4b73-aa81-2976d3b79576
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f
Kemp, Alan E.S.
131b479e-c2c4-47ae-abe1-ad968490960e
Davies, Andrew
dc4a10da-d700-4b73-aa81-2976d3b79576
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f

Kemp, Alan E.S., Davies, Andrew and Pearce, Richard B. (2015) Trochosira polychaeta: a colonial diatom from the late Cretaceous exhibiting two contrasting chain-linking mechanisms and a wide range of preservation. Diatom Research, 30 (1-2), 151-162. (doi:10.1080/0269249X.2014.999130).

Record type: Article

Abstract

The fossil species Trochosira polychaeta Strelnikova, exhibits a wide range of preservational states that has led to contrasting interpretations with regard to its resting stage or vegetative cell status. Within shallow-buried, well preserved diatomites from the Alpha Ridge of the Arctic Ocean, a continuum of dissolution effects are documented and a vegetative cell status is clearly indicated. The chains are formed by a central linking process but complex marginal structures also constitute a complementary linking mechanism. The double linkage may have supported the integrity of the colonial chains and provided a mechanism for enhanced nutrient uptake. The presence of two distinct types of linking might also represent a stage in a transition from the Cretaceous when central linking structures were common, through the Cenozoic to the modern with more common linking through marginal structures.

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Kemp_Davies_Pearce_2015.pdf - Accepted Manuscript
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More information

Accepted/In Press date: 17 December 2014
e-pub ahead of print date: 9 February 2015
Published date: June 2015
Keywords: trochosira polychaeta, cretaceous, diatoms, dissolution, chain linkage, transitional form
Organisations: Paleooceanography & Palaeoclimate

Identifiers

Local EPrints ID: 385055
URI: http://eprints.soton.ac.uk/id/eprint/385055
ISSN: 0269-249X
PURE UUID: 29fe7203-1918-4305-8cd8-d7855c1a830d

Catalogue record

Date deposited: 15 Dec 2015 10:31
Last modified: 14 Mar 2024 22:09

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Contributors

Author: Alan E.S. Kemp
Author: Andrew Davies

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