Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula)
One of the richest and best preserved late Campanian-Maastrichtian ammonite faunas of the world occurs within the Lopez de Bertodano Formation on Seymour Island. The excellent exposure of this sequence has offered an opportunity for detailed stratigraphic study of the fauna, providing a stratigraphi...
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Language: | English |
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Cambridge University Press (CUP)
1986
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Online Access: | http://dx.doi.org/10.1017/s0022336000060765 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000060765 |
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crcambridgeupr:10.1017/s0022336000060765 2024-05-12T07:55:53+00:00 Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) Macellari, Carlos E. 1986 http://dx.doi.org/10.1017/s0022336000060765 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000060765 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Paleontology volume 60, issue S18, page 1-55 ISSN 0022-3360 1937-2337 Paleontology journal-article 1986 crcambridgeupr https://doi.org/10.1017/s0022336000060765 2024-04-18T06:54:38Z One of the richest and best preserved late Campanian-Maastrichtian ammonite faunas of the world occurs within the Lopez de Bertodano Formation on Seymour Island. The excellent exposure of this sequence has offered an opportunity for detailed stratigraphic study of the fauna, providing a stratigraphic control unavailable for most other Southern Hemisphere strata of similar age. Ammonites are restricted to the Cretaceous portion of the Lopez de Bertodano Formation, becoming more abundant and increasing in diversity within a 600-m interval below the Cretaceous-Tertiary boundary. The ammonite-rich levels are divided into three zones (from oldest to youngest: Pachydiscus ootacodensis, P. riccardi and P. ultimus zones), extending from the late Campanian-Maastrichtian to the latest Maastrichtian. The taxonomic study of this fauna shows a predominance of endemic taxa of the family Kossmaticeratidae, including the species Maorites tuberculatus Howarth, M. seymourianus (Kilian and Reboul), M. densicostatus (Kilian and Reboul), M. weddelliensis n. sp., Grossouvrites gemmatus (Huppe) and Gunnarites bhavaniformis (Kilian and Reboul). These taxa, together with the members of the family Desmoceratidae Kitchinites ( Kitchinites ) darwini (Steinmann) and K. ( K. ) laurae n. sp., are mostly restricted to the margins of the Late Cretaceous Weddellian Province that extended from southern South America to Australia. Cosmopolitan genera described in this work become more abundant up section and include the species Anagaudryceras seymouriense n. sp., Zelandites varuna (Forbes), Pseudophyllites loryi (Kilian and Reboul), Diplomoceras lambi Spath, Pachydiscus ( Pachydiscus ) ootacodensis (Stoliczka), P. ( P. ) riccardi n. sp. and P. ( P. ) ultimus n. sp. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Seymour Island Cambridge University Press Antarctic Antarctic Peninsula Forbes ENVELOPE(-66.550,-66.550,-67.783,-67.783) Lambi ENVELOPE(-6.700,-6.700,62.140,62.140) Lopez ENVELOPE(-63.567,-63.567,-64.850,-64.850) Lopez de Bertodano ENVELOPE(-56.719,-56.719,-64.236,-64.236) Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Varuna ENVELOPE(11.737,11.737,-70.769,-70.769) Journal of Paleontology 60 S18 1 55 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology |
spellingShingle |
Paleontology Macellari, Carlos E. Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
topic_facet |
Paleontology |
description |
One of the richest and best preserved late Campanian-Maastrichtian ammonite faunas of the world occurs within the Lopez de Bertodano Formation on Seymour Island. The excellent exposure of this sequence has offered an opportunity for detailed stratigraphic study of the fauna, providing a stratigraphic control unavailable for most other Southern Hemisphere strata of similar age. Ammonites are restricted to the Cretaceous portion of the Lopez de Bertodano Formation, becoming more abundant and increasing in diversity within a 600-m interval below the Cretaceous-Tertiary boundary. The ammonite-rich levels are divided into three zones (from oldest to youngest: Pachydiscus ootacodensis, P. riccardi and P. ultimus zones), extending from the late Campanian-Maastrichtian to the latest Maastrichtian. The taxonomic study of this fauna shows a predominance of endemic taxa of the family Kossmaticeratidae, including the species Maorites tuberculatus Howarth, M. seymourianus (Kilian and Reboul), M. densicostatus (Kilian and Reboul), M. weddelliensis n. sp., Grossouvrites gemmatus (Huppe) and Gunnarites bhavaniformis (Kilian and Reboul). These taxa, together with the members of the family Desmoceratidae Kitchinites ( Kitchinites ) darwini (Steinmann) and K. ( K. ) laurae n. sp., are mostly restricted to the margins of the Late Cretaceous Weddellian Province that extended from southern South America to Australia. Cosmopolitan genera described in this work become more abundant up section and include the species Anagaudryceras seymouriense n. sp., Zelandites varuna (Forbes), Pseudophyllites loryi (Kilian and Reboul), Diplomoceras lambi Spath, Pachydiscus ( Pachydiscus ) ootacodensis (Stoliczka), P. ( P. ) riccardi n. sp. and P. ( P. ) ultimus n. sp. |
format |
Article in Journal/Newspaper |
author |
Macellari, Carlos E. |
author_facet |
Macellari, Carlos E. |
author_sort |
Macellari, Carlos E. |
title |
Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
title_short |
Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
title_full |
Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
title_fullStr |
Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
title_full_unstemmed |
Late Campanian–Maastrichtian Ammonite Fauna from Seymour Island (Antarctic Peninsula) |
title_sort |
late campanian–maastrichtian ammonite fauna from seymour island (antarctic peninsula) |
publisher |
Cambridge University Press (CUP) |
publishDate |
1986 |
url |
http://dx.doi.org/10.1017/s0022336000060765 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000060765 |
long_lat |
ENVELOPE(-66.550,-66.550,-67.783,-67.783) ENVELOPE(-6.700,-6.700,62.140,62.140) ENVELOPE(-63.567,-63.567,-64.850,-64.850) ENVELOPE(-56.719,-56.719,-64.236,-64.236) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(11.737,11.737,-70.769,-70.769) |
geographic |
Antarctic Antarctic Peninsula Forbes Lambi Lopez Lopez de Bertodano Seymour Seymour Island Varuna |
geographic_facet |
Antarctic Antarctic Peninsula Forbes Lambi Lopez Lopez de Bertodano Seymour Seymour Island Varuna |
genre |
Antarc* Antarctic Antarctic Peninsula Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Seymour Island |
op_source |
Journal of Paleontology volume 60, issue S18, page 1-55 ISSN 0022-3360 1937-2337 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022336000060765 |
container_title |
Journal of Paleontology |
container_volume |
60 |
container_issue |
S18 |
container_start_page |
1 |
op_container_end_page |
55 |
_version_ |
1798835752471101440 |