New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus
New bioerosion traces produced by insects in bones are reported from the Hyperodapedon Assemblage Zone of the Santa Maria Supersequence (Carnian, Brazil). The bones are assigned to a single rhynchosaur Hyperodapedon mariensis individual and among the traces, the ichnogenera Osteocallis (Osteocalli...
| 發表在: | Acta Palaeontologica Polonica |
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| Main Authors: | , , |
| 格式: | Article |
| 語言: | 英语 |
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Institute of Paleobiology PAS
2024-03-01
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| 主題: | |
| 在線閱讀: | https://www.app.pan.pl/archive/published/app69/app010932023.pdf |
| _version_ | 1850296561310892032 |
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| author | LUCCA S. CUNHA PAULA DENTZIEN-DIAS HEITOR FRANCISCHINI |
| author_facet | LUCCA S. CUNHA PAULA DENTZIEN-DIAS HEITOR FRANCISCHINI |
| author_sort | LUCCA S. CUNHA |
| collection | DOAJ |
| container_title | Acta Palaeontologica Polonica |
| description | New bioerosion traces produced by insects in bones are reported from the Hyperodapedon Assemblage Zone of the
Santa Maria Supersequence (Carnian, Brazil). The bones are assigned to a single rhynchosaur Hyperodapedon mariensis
individual and among the traces, the ichnogenera Osteocallis (Osteocallis mandibulus, Osteocallis infestans, and
Osteocallis isp.) and Amphifaoichnus (Amphifaoichnus isp.) are recognized, along with two morphotypes of indiscrete
traces: clusters of grooves and borings. All the traces are assigned to the action of insects exploring the rhynchosaur
carcass. Osteocallis and associated clusters of grooves are interpreted as feeding traces, but whether they represent
necrophagic or osteophagic behavior is still uncertain. The lack of direct evidence for the ethological interpretation
of Amphifaoichnus precludes its sole correlation with osteophagy, and other possibilities, such as the construction of
temporary domiciles related to feeding or sediment moisture, are discussed. The traces analyzed here indicate that the
insects explored a buried carcass, challenging the automatic association of Osteocallis and prolonged subaerial exposure
of bones, placing insects as relevant taphonomic agents that affect the preservation of vertebrate carcasses. Additionally,
the first appearance record of Amphifaoichnus is expanded back more than 140 Ma, indicating that complex behaviors
employed by insects in bone exploration were already established in the early Late Triassic, shortly after the oldest
records of invertebrate bioerosion in bones on continental settings. |
| format | Article |
| id | doaj-art-677fa5a1ccce407699df240e698b6033 |
| institution | Directory of Open Access Journals |
| issn | 1732-2421 |
| language | English |
| publishDate | 2024-03-01 |
| publisher | Institute of Paleobiology PAS |
| record_format | Article |
| spelling | doaj-art-677fa5a1ccce407699df240e698b60332025-08-19T23:32:57ZengInstitute of Paleobiology PASActa Palaeontologica Polonica1732-24212024-03-0169112110.4202/app.01093.2023New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and AmphifaoichnusLUCCA S. CUNHA0PAULA DENTZIEN-DIAS1HEITOR FRANCISCHINI2Programa de Pós-Graduação em Geociências, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil.Departamento de Paleontologia e Estratigrafia, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil.Departamento de Paleontologia e Estratigrafia, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, 91501-970, Brazil.New bioerosion traces produced by insects in bones are reported from the Hyperodapedon Assemblage Zone of the Santa Maria Supersequence (Carnian, Brazil). The bones are assigned to a single rhynchosaur Hyperodapedon mariensis individual and among the traces, the ichnogenera Osteocallis (Osteocallis mandibulus, Osteocallis infestans, and Osteocallis isp.) and Amphifaoichnus (Amphifaoichnus isp.) are recognized, along with two morphotypes of indiscrete traces: clusters of grooves and borings. All the traces are assigned to the action of insects exploring the rhynchosaur carcass. Osteocallis and associated clusters of grooves are interpreted as feeding traces, but whether they represent necrophagic or osteophagic behavior is still uncertain. The lack of direct evidence for the ethological interpretation of Amphifaoichnus precludes its sole correlation with osteophagy, and other possibilities, such as the construction of temporary domiciles related to feeding or sediment moisture, are discussed. The traces analyzed here indicate that the insects explored a buried carcass, challenging the automatic association of Osteocallis and prolonged subaerial exposure of bones, placing insects as relevant taphonomic agents that affect the preservation of vertebrate carcasses. Additionally, the first appearance record of Amphifaoichnus is expanded back more than 140 Ma, indicating that complex behaviors employed by insects in bone exploration were already established in the early Late Triassic, shortly after the oldest records of invertebrate bioerosion in bones on continental settings.https://www.app.pan.pl/archive/published/app69/app010932023.pdfrhynchosauriaichnotaxonomyinsectosteophagypaleoecologytaphonomyvertebrate carcasstriassicsanta maria supersequencebrazil |
| spellingShingle | LUCCA S. CUNHA PAULA DENTZIEN-DIAS HEITOR FRANCISCHINI New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus rhynchosauria ichnotaxonomy insect osteophagy paleoecology taphonomy vertebrate carcass triassic santa maria supersequence brazil |
| title | New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus |
| title_full | New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus |
| title_fullStr | New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus |
| title_full_unstemmed | New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus |
| title_short | New bioerosion traces in rhynchosaur bones from the Upper Triassic of Brazil and the oldest occurrence of the ichnogenera Osteocallis and Amphifaoichnus |
| title_sort | new bioerosion traces in rhynchosaur bones from the upper triassic of brazil and the oldest occurrence of the ichnogenera osteocallis and amphifaoichnus |
| topic | rhynchosauria ichnotaxonomy insect osteophagy paleoecology taphonomy vertebrate carcass triassic santa maria supersequence brazil |
| url | https://www.app.pan.pl/archive/published/app69/app010932023.pdf |
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