An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata
An exceptionally well-preserved specimen of Leptochiton sp. attached to a brachiopod valve is described from the early Eocene beds of the La Meseta Formation, Seymour Island. It records the first fossil Polyplacophora from Antarctica. The small specimen has eight imbricating valves, rounded lateral...
Published in: | Journal of Paleontology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Paleontological Society
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/128937 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/128937 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/128937 2023-10-09T21:46:39+02:00 An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata Lopez Cabrera O., Maria Isabel Olivero, Eduardo Bernardo application/pdf http://hdl.handle.net/11336/128937 eng eng Paleontological Society info:eu-repo/semantics/altIdentifier/doi/10.1666/10-161.1 info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/journal-of-paleontology/volume-85/issue-5/10-161.1/An-Eocene-Articulated-Polyplacophora-Mollusca-from-the-La-Meseta-Formation/10.1666/10-161.1.short http://hdl.handle.net/11336/128937 Lopez Cabrera O., Maria Isabel; Olivero, Eduardo Bernardo; An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata; Paleontological Society; Journal of Paleontology; 85; 5; 9-2011; 970-976 0022-3360 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Antarctica Polyplacophora Eocene La Meseta Formation Taphonomy https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1666/10-161.1 2023-09-24T19:11:40Z An exceptionally well-preserved specimen of Leptochiton sp. attached to a brachiopod valve is described from the early Eocene beds of the La Meseta Formation, Seymour Island. It records the first fossil Polyplacophora from Antarctica. The small specimen has eight imbricating valves, rounded lateral margins, ribs of fine granules, and growth marks in all valves. It strongly resembles extant Antarctic and South American species of Leptochiton Gray. The record of articulate valves in fossil Polyplacophora is rare and requires exceptional preservational conditions. Leptochiton sp. is associated with well preserved bryozoans, brachiopods, asterozoan echinoids, and serpulids, among other organisms that inhabited hard substrates in normal marine conditions, and probably lived attached to the side walls of an incised valley eroded in Cretaceous sediments. The well-preserved fossils were probably removed from their attachment site during storm events and, after a short transportation, rapidly buried within the early Eocene valley-fill deposits. The fossil-bearing beds are included in the Telm 2 or Acantilados Allomember of the La Meseta Formation. Fil: Lopez Cabrera O., Maria Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Article in Journal/Newspaper Antarc* Antarctic Antarctica Seymour Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Austral Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Lopez ENVELOPE(-63.567,-63.567,-64.850,-64.850) Olivero ENVELOPE(-63.600,-63.600,-66.133,-66.133) Journal of Paleontology 85 5 970 976 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Antarctica Polyplacophora Eocene La Meseta Formation Taphonomy https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Antarctica Polyplacophora Eocene La Meseta Formation Taphonomy https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Lopez Cabrera O., Maria Isabel Olivero, Eduardo Bernardo An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
topic_facet |
Antarctica Polyplacophora Eocene La Meseta Formation Taphonomy https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
An exceptionally well-preserved specimen of Leptochiton sp. attached to a brachiopod valve is described from the early Eocene beds of the La Meseta Formation, Seymour Island. It records the first fossil Polyplacophora from Antarctica. The small specimen has eight imbricating valves, rounded lateral margins, ribs of fine granules, and growth marks in all valves. It strongly resembles extant Antarctic and South American species of Leptochiton Gray. The record of articulate valves in fossil Polyplacophora is rare and requires exceptional preservational conditions. Leptochiton sp. is associated with well preserved bryozoans, brachiopods, asterozoan echinoids, and serpulids, among other organisms that inhabited hard substrates in normal marine conditions, and probably lived attached to the side walls of an incised valley eroded in Cretaceous sediments. The well-preserved fossils were probably removed from their attachment site during storm events and, after a short transportation, rapidly buried within the early Eocene valley-fill deposits. The fossil-bearing beds are included in the Telm 2 or Acantilados Allomember of the La Meseta Formation. Fil: Lopez Cabrera O., Maria Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina |
format |
Article in Journal/Newspaper |
author |
Lopez Cabrera O., Maria Isabel Olivero, Eduardo Bernardo |
author_facet |
Lopez Cabrera O., Maria Isabel Olivero, Eduardo Bernardo |
author_sort |
Lopez Cabrera O., Maria Isabel |
title |
An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
title_short |
An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
title_full |
An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
title_fullStr |
An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
title_full_unstemmed |
An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata |
title_sort |
eocene articulated polyplacophora (mollusca) from the la meseta formation, antarctica and the stratigraphy of the fossil-bearing strata |
publisher |
Paleontological Society |
url |
http://hdl.handle.net/11336/128937 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-63.567,-63.567,-64.850,-64.850) ENVELOPE(-63.600,-63.600,-66.133,-66.133) |
geographic |
Antarctic Austral Argentina Seymour Seymour Island Lopez Olivero |
geographic_facet |
Antarctic Austral Argentina Seymour Seymour Island Lopez Olivero |
genre |
Antarc* Antarctic Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctica Seymour Island |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1666/10-161.1 info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/journal-of-paleontology/volume-85/issue-5/10-161.1/An-Eocene-Articulated-Polyplacophora-Mollusca-from-the-La-Meseta-Formation/10.1666/10-161.1.short http://hdl.handle.net/11336/128937 Lopez Cabrera O., Maria Isabel; Olivero, Eduardo Bernardo; An eocene articulated polyplacophora (Mollusca) from the La Meseta Formation, Antarctica and the stratigraphy of the fossil-bearing strata; Paleontological Society; Journal of Paleontology; 85; 5; 9-2011; 970-976 0022-3360 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1666/10-161.1 |
container_title |
Journal of Paleontology |
container_volume |
85 |
container_issue |
5 |
container_start_page |
970 |
op_container_end_page |
976 |
_version_ |
1779309127099482112 |