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The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. Nov.

The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. Nov.
The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. Nov.

We describe a new agglutinated monothalamous foraminiferal species, Capsammina crassa sp. nov., based on integrated observations of the test morphology and the chemical characteristics of materials composing the test. The new species was found at a depth of <60 m on the East coast of Korea. The test morphology is typical of the genus Capsammina, comprising two or more mica plates with a ring of finely agglutinated mineral grains sandwiched between them and surrounding the cell body. There is no distinct test aperture. Elemental analyses of the agglutinated grains revealed 15 different types of mineral grains of which quartz is the most abundant. The surface areas of grains exposed on fractured surfaces ranged from 1.6 to 7,700 mm 2 and the large plate-like grains forming the upper and lower surfaces measured about 420-2,350 µm in maximum width. The new species is morphologically similar to C. patelliformis, however, the differences in size, distribution area and depth support that these two species are distinct. This discovery is the first record of the genus Capsammina from the North Pacific. Therefore, it extends the biodiversity and geographical distribution of the genus Capsammina, which has been reported only from the bathyal NE Atlantic. Our finding also suggests the possibility of additional discovery of monothalamous foraminifera from around Korea.

Capsammina, Foraminifera, Mineral, Monothalamous, South Korea
2167-8359
1-18
Lee, Somin
acafbb1c-c7da-4dc7-bd6a-dcfa892031a3
Du Châtelet, Eric Armynot
54684944-5b29-48a7-9940-bef4f711751c
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Guillot, François
d058a907-3e64-48fe-bf27-1156049bb152
Recourt, Philippe
44941d91-9a2d-40f1-99a9-a5687aafdb57
Frontalini, Fabrizio
0564bc17-ed9d-40e9-8894-ed916f3a7154
Lee, Wonchoel
12d0a306-7a91-4609-92db-a18d00a3c71d
Lee, Somin
acafbb1c-c7da-4dc7-bd6a-dcfa892031a3
Du Châtelet, Eric Armynot
54684944-5b29-48a7-9940-bef4f711751c
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Guillot, François
d058a907-3e64-48fe-bf27-1156049bb152
Recourt, Philippe
44941d91-9a2d-40f1-99a9-a5687aafdb57
Frontalini, Fabrizio
0564bc17-ed9d-40e9-8894-ed916f3a7154
Lee, Wonchoel
12d0a306-7a91-4609-92db-a18d00a3c71d

Lee, Somin, Du Châtelet, Eric Armynot, Gooday, Andrew J., Guillot, François, Recourt, Philippe, Frontalini, Fabrizio and Lee, Wonchoel (2019) The chemical composition of a new “mica sandwich” foraminiferal species from the East Coast of Korea: Capsammina crassa sp. Nov. PeerJ, 2019 (3), 1-18. (doi:10.7717/peerj.6642).

Record type: Article

Abstract

We describe a new agglutinated monothalamous foraminiferal species, Capsammina crassa sp. nov., based on integrated observations of the test morphology and the chemical characteristics of materials composing the test. The new species was found at a depth of <60 m on the East coast of Korea. The test morphology is typical of the genus Capsammina, comprising two or more mica plates with a ring of finely agglutinated mineral grains sandwiched between them and surrounding the cell body. There is no distinct test aperture. Elemental analyses of the agglutinated grains revealed 15 different types of mineral grains of which quartz is the most abundant. The surface areas of grains exposed on fractured surfaces ranged from 1.6 to 7,700 mm 2 and the large plate-like grains forming the upper and lower surfaces measured about 420-2,350 µm in maximum width. The new species is morphologically similar to C. patelliformis, however, the differences in size, distribution area and depth support that these two species are distinct. This discovery is the first record of the genus Capsammina from the North Pacific. Therefore, it extends the biodiversity and geographical distribution of the genus Capsammina, which has been reported only from the bathyal NE Atlantic. Our finding also suggests the possibility of additional discovery of monothalamous foraminifera from around Korea.

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Accepted/In Press date: 19 February 2019
e-pub ahead of print date: 21 March 2019
Keywords: Capsammina, Foraminifera, Mineral, Monothalamous, South Korea

Identifiers

Local EPrints ID: 430118
URI: https://eprints.soton.ac.uk/id/eprint/430118
ISSN: 2167-8359
PURE UUID: 6152ca8f-6669-422c-82e1-091692dd40aa

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Date deposited: 12 Apr 2019 16:30
Last modified: 19 Jul 2019 16:35

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Contributors

Author: Somin Lee
Author: Eric Armynot Du Châtelet
Author: Andrew J. Gooday
Author: François Guillot
Author: Philippe Recourt
Author: Fabrizio Frontalini
Author: Wonchoel Lee

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