A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite

Taphonomic processes play an important role in the preservation of small morphological features such as granulation or pits. However, the assessment of these features may face the issue of the small size of the specimens and, sometimes, the destructiveness of these analyses, which makes impossible c...

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Detalles Bibliográficos
Autores: Esteve, Jorge, Zhao, Yuan-Long, Maté-González, Miguel Ángel, Gómez Heras, Miguel, Peng, Jin
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Universidad de Salamanca (USAL)
Repositorio:GREDOS. Repositorio Institucional de la Universidad de Salamanca
OAI Identifier:oai:gredos.usal.es:10366/154419
Acceso en línea:http://hdl.handle.net/10366/154419
Access Level:acceso abierto
Palabra clave:Cambrian trilobite
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spelling A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobiteEsteve, JorgeZhao, Yuan-LongMaté-González, Miguel ÁngelGómez Heras, MiguelPeng, JinCambrian trilobiteTaphonomic processes play an important role in the preservation of small morphological features such as granulation or pits. However, the assessment of these features may face the issue of the small size of the specimens and, sometimes, the destructiveness of these analyses, which makes impossible carrying them out in singular specimen, such as holotypes or lectotypes. This paper takes a new approach to analysing small-morphological features, by using an optical surface roughness (OSR) meter to create a high-resolution three-dimensional digital-elevation model (DEM). This non-destructive technique allows analysing quantitatively the DEM using geometric morphometric methods (GMM). We created a number of DEMs from three populations putatively belonging to the same species of trilobite (Oryctocephalus indicus) that present the same cranidial outline, but differ in the presence or absence of the second and third transglabellar furrows. Profile analysis of the DEMs demonstrate that all three populations show similar preservation variation in the glabellar furrows and lobes. The GMM shows that all populations exhibit the same range of variation. Differences in preservation are a consequence of different degrees of cementation and rates of dissolution. Fast cementation enhances the preservation of glabellar furrows and lobes, while fast dissolution hampers preservation of the same structures.202420242018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10366/154419reponame:GREDOS. Repositorio Institucional de la Universidad de Salamancainstname:Universidad de Salamanca (USAL)CGL2013-48877-Pinfo:eu-repo/semantics/openAccessoai:gredos.usal.es:10366/1544192026-06-07T06:28:51Z
dc.title.none.fl_str_mv A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
title A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
spellingShingle A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
Esteve, Jorge
Cambrian trilobite
title_short A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
title_full A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
title_fullStr A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
title_full_unstemmed A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
title_sort A new high-resolution 3-D quantitative method for analysing small morphological features: an example using a Cambrian trilobite
dc.creator.none.fl_str_mv Esteve, Jorge
Zhao, Yuan-Long
Maté-González, Miguel Ángel
Gómez Heras, Miguel
Peng, Jin
author Esteve, Jorge
author_facet Esteve, Jorge
Zhao, Yuan-Long
Maté-González, Miguel Ángel
Gómez Heras, Miguel
Peng, Jin
author_role author
author2 Zhao, Yuan-Long
Maté-González, Miguel Ángel
Gómez Heras, Miguel
Peng, Jin
author2_role author
author
author
author
dc.subject.none.fl_str_mv Cambrian trilobite
topic Cambrian trilobite
description Taphonomic processes play an important role in the preservation of small morphological features such as granulation or pits. However, the assessment of these features may face the issue of the small size of the specimens and, sometimes, the destructiveness of these analyses, which makes impossible carrying them out in singular specimen, such as holotypes or lectotypes. This paper takes a new approach to analysing small-morphological features, by using an optical surface roughness (OSR) meter to create a high-resolution three-dimensional digital-elevation model (DEM). This non-destructive technique allows analysing quantitatively the DEM using geometric morphometric methods (GMM). We created a number of DEMs from three populations putatively belonging to the same species of trilobite (Oryctocephalus indicus) that present the same cranidial outline, but differ in the presence or absence of the second and third transglabellar furrows. Profile analysis of the DEMs demonstrate that all three populations show similar preservation variation in the glabellar furrows and lobes. The GMM shows that all populations exhibit the same range of variation. Differences in preservation are a consequence of different degrees of cementation and rates of dissolution. Fast cementation enhances the preservation of glabellar furrows and lobes, while fast dissolution hampers preservation of the same structures.
publishDate 2018
dc.date.none.fl_str_mv 2018
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10366/154419
url http://hdl.handle.net/10366/154419
dc.relation.none.fl_str_mv CGL2013-48877-P
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:GREDOS. Repositorio Institucional de la Universidad de Salamanca
instname:Universidad de Salamanca (USAL)
instname_str Universidad de Salamanca (USAL)
reponame_str GREDOS. Repositorio Institucional de la Universidad de Salamanca
collection GREDOS. Repositorio Institucional de la Universidad de Salamanca
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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