Eocene asteroids (Echinodermata) from Seymour Island, Antarctic Peninsula

1988 ◽  
pp. 489-498 ◽  
Author(s):  
Daniel B. Blake ◽  
William J. Zinsmeister
Keyword(s):  
Antarctic Peninsula ◽  
Seymour Island

Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula

2014 ◽  
Vol 50 ◽  
pp. 228-237 ◽  
Author(s):  
José Patricio O'Gorman ◽  
Eduardo Bernardo Olivero ◽  
Sergio Santillana ◽  
Michael J. Everhart ◽  
Marcelo Reguero
Keyword(s):  
Antarctic Peninsula ◽  
Seymour Island ◽  
Upper Maastrichtian

The youngest record of fossil land mammals from Antarctica; its significance on the evolution of the terrestrial environment of the Antarctic Peninsula during the late Eocene

1997 ◽  
Vol 71 (2) ◽  
pp. 348-350 ◽  
Author(s):  
S. F. Vizcaino ◽  
M. Bond ◽  
M. A. Reguero ◽  
R. Pascual
Keyword(s):  
Antarctic Peninsula ◽  
Present Note ◽  
Late Eocene ◽  
South American ◽  
Terrestrial Environment ◽  
Shallow Marine ◽  
Early Oligocene ◽  
La Meseta Formation ◽  
The Antarctic ◽  
Seymour Island

The record of fossil land mammals from Antarctica has been restricted previously to the middle levels of the Eocene-?early Oligocene La Meseta Formation in Seymour Island, Antarctic Peninsula. This mostly shallow-marine sequence was divided informally into seven subunits (Tertiary Eocene La Meseta or TELM 1 to 7) by Sadler (1988). Land mammals, representing South American lineages of marsupials, edentates, and ungulates were recovered from TELM 3, 4, and 5 (Marenssi et al., 1994; Vizcaíno et al., 1994). The purpose of the present note is to report the discovery of a well-preserved ungulate tooth from the uppermost level of the La Meseta Formation (TELM 7) and to discuss its paleoenvironmental implications.

scholarly journals Revision of Eocene Antarctic carpet sharks (Elasmobranchii, Orectolobiformes) from Seymour Island, Antarctic Peninsula

2016 ◽  
Vol 15 (12) ◽  
pp. 969-990 ◽  
Author(s):  
Andrea Engelbrecht ◽  
Thomas Mörs ◽  
Marcelo A. Reguero ◽  
Jürgen Kriwet
Keyword(s):  
Antarctic Peninsula ◽  
Seymour Island

scholarly journals Permafrost in Seymour Island and James Ross Island, Antarctic Peninsula Region

1992 ◽  
Vol 65 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Masami FUKUDA ◽  
Kazuo SHIMOKAWA ◽  
Nobuyuki TAKAHASHI ◽  
Toshio SONE
Keyword(s):  
Antarctic Peninsula ◽  
James Ross Island ◽  
Seymour Island

scholarly journals New mammalian and avian records from the late Eocene La Meseta and Submeseta formations of Seymour Island, Antarctica

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8268
Author(s):  
Sarah N. Davis ◽  
Christopher R. Torres ◽  
Grace M. Musser ◽  
James V. Proffitt ◽  
Nicholas M.A. Crouch ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Global Climate ◽  
Late Eocene ◽  
Eastern Coast ◽  
Ice Cap ◽  
Postcranial Remains ◽  
Circumpolar Current ◽  
The Antarctic ◽  
Insight Into ◽  
Seymour Island

The middle–late Eocene of Antarctica was characterized by dramatic change as the continent became isolated from the other southern landmasses and the Antarctic Circumpolar Current formed. These events were crucial to the formation of the permanent Antarctic ice cap, affecting both regional and global climate change. Our best insight into how life in the high latitudes responded to this climatic shift is provided by the fossil record from Seymour Island, near the eastern coast of the Antarctic Peninsula. While extensive collections have been made from the La Meseta and Submeseta formations of this island, few avian taxa other than penguins have been described and mammalian postcranial remains have been scarce. Here, we report new fossils from Seymour Island collected by the Antarctic Peninsula Paleontology Project. These include a mammalian metapodial referred to Xenarthra and avian material including a partial tarsometatarsus referred to Gruiformes (cranes, rails, and allies). Penguin fossils (Sphenisciformes) continue to be most abundant in new collections from these deposits. We report several penguin remains including a large spear-like mandible preserving the symphysis, a nearly complete tarsometatarsus with similarities to the large penguin clade Palaeeudyptes but possibly representing a new species, and two small partial tarsometatarsi belonging to the genus Delphinornis. These findings expand our view of Eocene vertebrate faunas on Antarctica. Specifically, the new remains referred to Gruiformes and Xenarthra provide support for previously proposed, but contentious, earliest occurrence records of these clades on the continent.

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