The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Rios Province, Argentina, with remarks on their systematics and biogeography
Identifieur interne : 000105 ( PascalFrancis/Checkpoint ); précédent : 000104; suivant : 000106The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Rios Province, Argentina, with remarks on their systematics and biogeography
Auteurs : Diego Brandoni [Argentine]Source :
- Geobios : (Lyon) [ 0016-6995 ] ; 2011.
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- Pascal (Inist)
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- geographic : Argentine.
- topic : Conglomérat.
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Abstract
Megalonychidae are known from the Deseadan of Argentina and Bolivia to the present, represented by the tree sloth Choloepus Illiger. The principal fossil records of this clade are those from the Quaternary of Central America and the Antilles (e.g., Megalocnus Leidy, Acratocnus Anthony) and North America (e.g., Megalonyx Harlan, Pliometanastes Hirschfeld and Webb). From the Quaternary of South America, Megalonychidae are recorded in Peru (Diabolotherium Pujos, De luliis, Argot and Werdelin) and Brazil (e.g., Ahytherium Cartelle, De Iuliis and Pujos, Australonyx De Iuliis, Pujos and Cartelle). In Argentina they also have been recorded in the Santa Cruz Formation (early-middle Miocene) on the coast of Santa Cruz Province (Eucholaeops Ameghino), Arroyo Chasicó Formation (Protomegalonyx Kraglievich), Río Negro Formation, in the "conglomerado osífero" (ossiferous conglomerate) or "Mesopotamiense" (late Miocene) at the base of Ituzaingó Formation, Entre Ríos Province, and Pleistocene of Buenos Aires Province. Several authors have studied the Megalonychidae from the "conglomerado osífero", but no systematic revision of the group has been undertaken beyond the original naming of species. Taking into account that a broad range of individual variation has been observed in the Megalonychidae from the Pleistocene of North America and the West Indies, and that a similar range probably existed among the megalonychids from the "conglomerado osífero", then the number of valid species might be lower than previously proposed. Thus, the valid species recovered from the "conglomerado osífero" are Ortotherium laticurvatum Ameghino, Pliomorphus mutilatus Ameghino, Amphiocnus paranense Kraglievich, Protomegalonyx doellojuradoi Kraglievich, Pr. Praecursor Kraglievich, Megalonychops primigenius Kraglievich, and Paranabradys vucetichae Scillato-Yané. However, the establishment of synonymies, as well as the generic and specific assignation of the specimens is not an easy task, due to the peculiar taphonomical context of this stratigraphic unit.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Rios Province, Argentina, with remarks on their systematics and biogeography</title><author><name sortKey="Brandoni, Diego" sort="Brandoni, Diego" uniqKey="Brandoni D" first="Diego" last="Brandoni">Diego Brandoni</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratorio de Paleontologia de Vertebrados, CICYTTP-CONICET, Materi y Espana, (3105) Diamante</s1><s2>Entre Rios</s2><s3>ARG</s3><sZ>1 aut.</sZ></inist:fA14><country>Argentine</country><wicri:noRegion>Entre Rios</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0222345</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0222345 INIST</idno><idno type="RBID">Pascal:11-0222345</idno><idno type="wicri:Area/PascalFrancis/Corpus">000145</idno><idno type="wicri:Area/PascalFrancis/Curation">000555</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000105</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000105</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Rios Province, Argentina, with remarks on their systematics and biogeography</title><author><name sortKey="Brandoni, Diego" sort="Brandoni, Diego" uniqKey="Brandoni D" first="Diego" last="Brandoni">Diego Brandoni</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratorio de Paleontologia de Vertebrados, CICYTTP-CONICET, Materi y Espana, (3105) Diamante</s1><s2>Entre Rios</s2><s3>ARG</s3><sZ>1 aut.</sZ></inist:fA14><country>Argentine</country><wicri:noRegion>Entre Rios</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Geobios : (Lyon)</title><title level="j" type="abbreviated">Geobios : (Lyon)</title><idno type="ISSN">0016-6995</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Geobios : (Lyon)</title><title level="j" type="abbreviated">Geobios : (Lyon)</title><idno type="ISSN">0016-6995</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Argentina</term><term>Xenarthra</term><term>biogeography</term><term>biostratigraphy</term><term>bones</term><term>conglomerate</term><term>paleobiogeography</term><term>stratigraphic units</term><term>taxonomy</term><term>upper Miocene</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Xenarthra</term><term>Biogéographie</term><term>Paléobiogéographie</term><term>Miocène sup</term><term>Ossement</term><term>Biostratigraphie</term><term>Conglomérat</term><term>Unité stratigraphique</term><term>Taxinomie</term><term>Province Entre Rios</term><term>Megalonychidae</term><term>Argentine</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Argentine</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Conglomérat</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Megalonychidae are known from the Deseadan of Argentina and Bolivia to the present, represented by the tree sloth Choloepus Illiger. The principal fossil records of this clade are those from the Quaternary of Central America and the Antilles (e.g., Megalocnus Leidy, Acratocnus Anthony) and North America (e.g., Megalonyx Harlan, Pliometanastes Hirschfeld and Webb). From the Quaternary of South America, Megalonychidae are recorded in Peru (Diabolotherium Pujos, De luliis, Argot and Werdelin) and Brazil (e.g., Ahytherium Cartelle, De Iuliis and Pujos, Australonyx De Iuliis, Pujos and Cartelle). In Argentina they also have been recorded in the Santa Cruz Formation (early-middle Miocene) on the coast of Santa Cruz Province (Eucholaeops Ameghino), Arroyo Chasicó Formation (Protomegalonyx Kraglievich), Río Negro Formation, in the "conglomerado osífero" (ossiferous conglomerate) or "Mesopotamiense" (late Miocene) at the base of Ituzaingó Formation, Entre Ríos Province, and Pleistocene of Buenos Aires Province. Several authors have studied the Megalonychidae from the "conglomerado osífero", but no systematic revision of the group has been undertaken beyond the original naming of species. Taking into account that a broad range of individual variation has been observed in the Megalonychidae from the Pleistocene of North America and the West Indies, and that a similar range probably existed among the megalonychids from the "conglomerado osífero", then the number of valid species might be lower than previously proposed. Thus, the valid species recovered from the "conglomerado osífero" are Ortotherium laticurvatum Ameghino, Pliomorphus mutilatus Ameghino, Amphiocnus paranense Kraglievich, Protomegalonyx doellojuradoi Kraglievich, Pr. Praecursor Kraglievich, Megalonychops primigenius Kraglievich, and Paranabradys vucetichae Scillato-Yané. However, the establishment of synonymies, as well as the generic and specific assignation of the specimens is not an easy task, due to the peculiar taphonomical context of this stratigraphic unit.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0016-6995</s0></fA01><fA03 i2="1"><s0>Geobios : (Lyon)</s0></fA03><fA05><s2>44</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>The Megalonychidae (Xenarthra, Tardigrada) from the late Miocene of Entre Rios Province, Argentina, with remarks on their systematics and biogeography</s1></fA08><fA11 i1="01" i2="1"><s1>BRANDONI (Diego)</s1></fA11><fA14 i1="01"><s1>Laboratorio de Paleontologia de Vertebrados, CICYTTP-CONICET, Materi y Espana, (3105) Diamante</s1><s2>Entre Rios</s2><s3>ARG</s3><sZ>1 aut.</sZ></fA14><fA20><s1>33-44</s1></fA20><fA21><s1>2011</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA24 i1="01"><s0>fre</s0></fA24><fA24 i1="02"><s0>spa</s0></fA24><fA43 i1="01"><s1>INIST</s1><s2>14199</s2><s5>354000193722270030</s5></fA43><fA44><s0>0000</s0><s1>© 2011 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1 p.3/4</s0></fA45><fA47 i1="01" i2="1"><s0>11-0222345</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Geobios : (Lyon)</s0></fA64><fA66 i1="01"><s0>FRA</s0></fA66><fC01 i1="01" l="ENG"><s0>Megalonychidae are known from the Deseadan of Argentina and Bolivia to the present, represented by the tree sloth Choloepus Illiger. The principal fossil records of this clade are those from the Quaternary of Central America and the Antilles (e.g., Megalocnus Leidy, Acratocnus Anthony) and North America (e.g., Megalonyx Harlan, Pliometanastes Hirschfeld and Webb). From the Quaternary of South America, Megalonychidae are recorded in Peru (Diabolotherium Pujos, De luliis, Argot and Werdelin) and Brazil (e.g., Ahytherium Cartelle, De Iuliis and Pujos, Australonyx De Iuliis, Pujos and Cartelle). In Argentina they also have been recorded in the Santa Cruz Formation (early-middle Miocene) on the coast of Santa Cruz Province (Eucholaeops Ameghino), Arroyo Chasicó Formation (Protomegalonyx Kraglievich), Río Negro Formation, in the "conglomerado osífero" (ossiferous conglomerate) or "Mesopotamiense" (late Miocene) at the base of Ituzaingó Formation, Entre Ríos Province, and Pleistocene of Buenos Aires Province. Several authors have studied the Megalonychidae from the "conglomerado osífero", but no systematic revision of the group has been undertaken beyond the original naming of species. Taking into account that a broad range of individual variation has been observed in the Megalonychidae from the Pleistocene of North America and the West Indies, and that a similar range probably existed among the megalonychids from the "conglomerado osífero", then the number of valid species might be lower than previously proposed. Thus, the valid species recovered from the "conglomerado osífero" are Ortotherium laticurvatum Ameghino, Pliomorphus mutilatus Ameghino, Amphiocnus paranense Kraglievich, Protomegalonyx doellojuradoi Kraglievich, Pr. Praecursor Kraglievich, Megalonychops primigenius Kraglievich, and Paranabradys vucetichae Scillato-Yané. 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