The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula
Abstract A worldwide revision of the Cretaceous record of Neornithes (crown birds) revealed that unambiguous neornithine taxa are extremely scarce, with only a few showing diagnostic features to be confidently assigned to that group. Here we report two new neornithine specimens from Vega Island (Lóp...
Published in: | Anais da Academia Brasileira de Ciências |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Academia Brasileira de Ciências
2023
|
Subjects: | |
Online Access: | https://doi.org/10.1590/0001-3765202320230802 https://doaj.org/article/efcff08b6fa04155bf9779866f59facd |
id |
ftdoajarticles:oai:doaj.org/article:efcff08b6fa04155bf9779866f59facd |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:efcff08b6fa04155bf9779866f59facd 2024-01-14T10:02:22+01:00 The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula GEOVANE A. DE SOUZA BRUNO A. BULAK MARINA B. SOARES JULIANA M. SAYÃO LUIZ CARLOS WEINSCHÜTZ ALESSANDRO BATEZELLI ALEXANDER W.A. KELLNER 2023-12-01T00:00:00Z https://doi.org/10.1590/0001-3765202320230802 https://doaj.org/article/efcff08b6fa04155bf9779866f59facd EN eng Academia Brasileira de Ciências http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601201&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230802 https://doaj.org/article/efcff08b6fa04155bf9779866f59facd Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) Mesozoic birds Neornithes Vegavis Antarctica James Ross Science Q article 2023 ftdoajarticles https://doi.org/10.1590/0001-3765202320230802 2023-12-17T01:44:35Z Abstract A worldwide revision of the Cretaceous record of Neornithes (crown birds) revealed that unambiguous neornithine taxa are extremely scarce, with only a few showing diagnostic features to be confidently assigned to that group. Here we report two new neornithine specimens from Vega Island (López de Bertodano Formation). The first is a synsacrum (MN 7832-V) that shows a complex pattern of transversal diverticula intercepting the canalis synsacri, as in extant neornithines. Micro-CT scanning revealed a camerate pattern of trabeculae typical of neornithines. It further shows the oldest occurrence of lumbosacral canals in Neornithes, which are related to a balance sensing system acting in the control of walking and perching. The second specimen (MN 7833-V) is a distal portion of a tarsometatarsus sharing with Vegavis iaai a straight apical border of the crista plantaris lateralis. Osteohistologically the tarsometatarsus shows a thick and highly vascularized cortex that lacks any growth marks, resembling Polarornis gregorii. The cortex is osteosclerotic as in other extinct and extant diving neornithines. These new specimens increase the occurrences of the Cretaceous avian material recovered from the Upper Cretaceous strata of the James Ross Sub-Basin, suggesting that a Vegaviidae-dominated avian assemblage was present in the Antarctic Peninsula during the upper Maastrichtian. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Vega Island Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Vega Island ENVELOPE(-57.500,-57.500,-63.833,-63.833) Anais da Academia Brasileira de Ciências 95 suppl 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Mesozoic birds Neornithes Vegavis Antarctica James Ross Science Q |
spellingShingle |
Mesozoic birds Neornithes Vegavis Antarctica James Ross Science Q GEOVANE A. DE SOUZA BRUNO A. BULAK MARINA B. SOARES JULIANA M. SAYÃO LUIZ CARLOS WEINSCHÜTZ ALESSANDRO BATEZELLI ALEXANDER W.A. KELLNER The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
topic_facet |
Mesozoic birds Neornithes Vegavis Antarctica James Ross Science Q |
description |
Abstract A worldwide revision of the Cretaceous record of Neornithes (crown birds) revealed that unambiguous neornithine taxa are extremely scarce, with only a few showing diagnostic features to be confidently assigned to that group. Here we report two new neornithine specimens from Vega Island (López de Bertodano Formation). The first is a synsacrum (MN 7832-V) that shows a complex pattern of transversal diverticula intercepting the canalis synsacri, as in extant neornithines. Micro-CT scanning revealed a camerate pattern of trabeculae typical of neornithines. It further shows the oldest occurrence of lumbosacral canals in Neornithes, which are related to a balance sensing system acting in the control of walking and perching. The second specimen (MN 7833-V) is a distal portion of a tarsometatarsus sharing with Vegavis iaai a straight apical border of the crista plantaris lateralis. Osteohistologically the tarsometatarsus shows a thick and highly vascularized cortex that lacks any growth marks, resembling Polarornis gregorii. The cortex is osteosclerotic as in other extinct and extant diving neornithines. These new specimens increase the occurrences of the Cretaceous avian material recovered from the Upper Cretaceous strata of the James Ross Sub-Basin, suggesting that a Vegaviidae-dominated avian assemblage was present in the Antarctic Peninsula during the upper Maastrichtian. |
format |
Article in Journal/Newspaper |
author |
GEOVANE A. DE SOUZA BRUNO A. BULAK MARINA B. SOARES JULIANA M. SAYÃO LUIZ CARLOS WEINSCHÜTZ ALESSANDRO BATEZELLI ALEXANDER W.A. KELLNER |
author_facet |
GEOVANE A. DE SOUZA BRUNO A. BULAK MARINA B. SOARES JULIANA M. SAYÃO LUIZ CARLOS WEINSCHÜTZ ALESSANDRO BATEZELLI ALEXANDER W.A. KELLNER |
author_sort |
GEOVANE A. DE SOUZA |
title |
The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
title_short |
The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
title_full |
The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
title_fullStr |
The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
title_full_unstemmed |
The Cretaceous Neornithine record and new Vegaviidae specimens from the López de Bertodano Formation (Upper Maastrichthian) of Vega Island, Antarctic Peninsula |
title_sort |
cretaceous neornithine record and new vegaviidae specimens from the lópez de bertodano formation (upper maastrichthian) of vega island, antarctic peninsula |
publisher |
Academia Brasileira de Ciências |
publishDate |
2023 |
url |
https://doi.org/10.1590/0001-3765202320230802 https://doaj.org/article/efcff08b6fa04155bf9779866f59facd |
long_lat |
ENVELOPE(-57.500,-57.500,-63.833,-63.833) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Vega Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Vega Island |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Vega Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Vega Island |
op_source |
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000601201&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202320230802 https://doaj.org/article/efcff08b6fa04155bf9779866f59facd |
op_doi |
https://doi.org/10.1590/0001-3765202320230802 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
95 |
container_issue |
suppl 3 |
_version_ |
1788057363007143936 |