NDLI: Bimineralic bryozoan skeletons: a comparison of three modern genera

Content Provider	Springer Nature Link
Author	Benedix, G. Jacob, D. E. Taylor, P. D.
Copyright Year	2013
Abstract	A combination of light microscopy, field-emission scanning electron microscopy (FE-SEM), electron microprobe, and Raman spectroscopic analysis is used here to study three cheilostome bryozoan taxa with bimineralic skeletons: Odontionella cyclops, Margaretta cereoides, and Pentapora spp. Typically for bimineralic bryozoans, all skeletal walls forming the box-like zooids are constructed primarily of calcite with only the outer layer of the frontal shield consisting of aragonite. The two minerals have characteristic lamellar (calcite) and fibrous (aragonite) ultrastructures visible in FE-SEM images. Similarities in skeletal ultrastructure between the three taxa are evident in the basal and vertical walls, which have almost the same thicknesses and fabrics. These calcitic walls consist of an inner layer with crystallites oriented parallel to the wall and an outer layer with crystallites perpendicular to the wall surface. The bimineralic frontal shields of Odontionella cyclops and Pentapora spp. are ca. 150 μm thick and Margaretta cereoides ca. 40–100 μm. Interfaces between calcite and aragonite layers in these walls are variable: in Odontionella cyclops the interface between the layers is relatively planar, while in the other two species it is undulose. In these bimineralic taxa frontal shields in the innermost parts of the calcite layer comprise low Mg-calcite with 3–4 mol% Mg, which increases to over 5 mol% Mg (intermediate Mg–calcite) near to the boundary with the overlying aragonite layer; Mg content drops to a minimal value of 0.2–0.3 mol% Mg in the aragonite. These findings are significant for our understanding of both biomineralization processes in bryozoans and the use of Mg skeletal chemistry as a temperature proxy.
Starting Page	389
Ending Page	403
Page Count	15
File Format	PDF
ISSN	01729179
Journal	Facies
Volume Number	60
Issue Number	2
e-ISSN	16124820
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-07-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bryozoa Biomineralization Carbonate mineralogy Sedimentology Biogeosciences Geochemistry Paleontology Ecology
Content Type	Text
Resource Type	Article
Subject	Geology Stratigraphy Paleontology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Mineralogy of Arctic bryozoan skeletons in a global context

Influence of seawater temperature on growth bands, mineralogy and carbonate production in a bioconstructional bryozoan

Offshore sedimentary facies of a modern carbonate ramp, Kuwait, northwestern Arabian-Persian Gulf

Carbonate standing stock and carbonate production of the bryozoanPentapora fascialis in the North-Western Mediterranean

A bryozoan fauna from the Santa Lucia Formation (Lower–Middle Devonian) of Cantabrian Mountains, NW Spain

Skeletal dissolution kinetics and mechanical tests in response to morphology among coral genera

Solenomeris: from biomineralization patterns to diagenesis

Permian bryozoans of the NW-tethys

Girvanella-coated grains from Cambrian oolitic limestone

Bimineralic bryozoan skeletons: a comparison of three modern genera

Similar Documents

Mineralogy of Arctic bryozoan skeletons in a global context

Influence of seawater temperature on growth bands, mineralogy and carbonate production in a bioconstructional bryozoan

Offshore sedimentary facies of a modern carbonate ramp, Kuwait, northwestern Arabian-Persian Gulf

Carbonate standing stock and carbonate production of the bryozoanPentapora fascialis in the North-Western Mediterranean

A bryozoan fauna from the Santa Lucia Formation (Lower–Middle Devonian) of Cantabrian Mountains, NW Spain

Skeletal dissolution kinetics and mechanical tests in response to morphology among coral genera

Solenomeris: from biomineralization patterns to diagenesis

Permian bryozoans of the NW-tethys

Girvanella-coated grains from Cambrian oolitic limestone

Bimineralic bryozoan skeletons: a comparison of three modern genera