PALEOENVIRONMENTAL INTERPRETATION OF TURRITELLINE GASTROPOD-DOMINATED ASSEMBLAGES (TDAS) FROM THE LA MESETA FORMATION (MIDDLE TO UPPER EOCENE), SEYMOUR ISLAND, ANTARCTICA

2018 ◽  
Author(s):  
Tasnuva Ming Khan ◽  
◽  
Brendan M. Anderson ◽  
Warren D. Allmon ◽  
Jeffrey D. Stilwell
Keyword(s):  
Upper Eocene ◽  
La Meseta Formation ◽  
Paleoenvironmental Interpretation ◽  
Seymour Island

Unusual nautilid occurrence in the upper Eocene La Meseta Formation, Seymour Island, Antarctica

1987 ◽  
Vol 61 (4) ◽  
pp. 724-726 ◽  
Author(s):  
William J. Zinsmeister
Keyword(s):  
Fossil Record ◽  
Upper Eocene ◽  
Large Numbers ◽  
La Meseta Formation ◽  
Seymour Island ◽  
Mass Stranding

The presence of large numbers of phragmocones of Eutrephoceras and Aturia in an upper Eocene beach deposit of the La Meseta Formation on Seymour Island is the first known occurrence of beach-drifted accumulations of nautilid shells in the fossil record and may also represent the first documentation of a mass stranding of nautilids in the Cenozoic.

First articulated teleost fish from the Paleogene of West Antarctica

1991 ◽  
Vol 3 (3) ◽  
pp. 309-316 ◽  
Author(s):  
Anna Jerzmańska
Keyword(s):  
Teleost Fish ◽  
Phylogenetic Relationships ◽  
Upper Eocene ◽  
West Antarctica ◽  
Lower Oligocene ◽  
La Meseta Formation ◽  
Similarities And Differences ◽  
The Antarctic ◽  
Precise Assessment ◽  
Seymour Island

Marambionella andreae gen. et sp. nov. from the La Meseta Formation (Upper Eocene–?Lower Oligocene) on Seymour Island is the first fossil clupeid found in Antarctica and the first articulated teleost from the Antarctic Paleogene. It shows a mosaic of similarities and differences compared with various clupeid genera. This and the uncertainty about the polarity of characters within clupeids do not allow precise assessment of the phylogenetic relationships of Marambionella.

scholarly journals GLOTTIDIA (BRACHIOPODA: LINGULIDAE) FROM THE EOCENE LA MESETA FORMATION, SEYMOUR ISLAND, ANTARCTICA

Palaeontology ◽  
2005 ◽  
Vol 48 (2) ◽  
pp. 423-431 ◽  
Author(s):  
CHRISTIAN C. EMIG ◽  
MARIA ALEKSANDRA BITNER
Keyword(s):  
La Meseta Formation ◽  
Seymour Island

Remarkably preserved annelid worms from the La Meseta Formation (Eocene), Seymour Island, Antarctica

Palaeontology ◽  
2005 ◽  
Vol 48 (1) ◽  
pp. 1-13 ◽  
Author(s):  
CARRIE E. SCHWEITZER ◽  
RODNEY M. FELDMANN ◽  
SERGIO MARENSSI ◽  
DAVID A. WAUGH
Keyword(s):  
La Meseta Formation ◽  
Seymour Island

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.

An Eocene wrasse (Perciformes; Labridae) from Seymour Island

1992 ◽  
Vol 4 (2) ◽  
pp. 235-237 ◽  
Author(s):  
Douglas J. Long
Keyword(s):  
Climatic Change ◽  
Trophic Structure ◽  
Late Eocene ◽  
Pharyngeal Tooth ◽  
Tooth Plate ◽  
Antarctic Waters ◽  
La Meseta Formation ◽  
First Occurrence ◽  
Wide Scale ◽  
Seymour Island

A nearly complete lower pharyngeal tooth-plate from a large (over 60 cm long) fossil wrasse (Perciformes: Labridae) was recently recovered from the middle to late Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula. This find increases the number of teleosts from the Eocene of Antarctica to five taxa, and further illustrates the diversity of the ichthyofauna in the Eocene Weddellian Sea prior to wide-scale climatic change in the Southern Ocean. The fossil wrasse represents the first occurrence of this family in Antarctica, and is one of the oldest fossils of this family from the Southern Hemisphere. Wrasses are not found in Antarctic waters today, and probably became extinct during the Oligocene due to a combination of climatic change, loss of shallow-water habitat, and changes in the trophic structure of the Wedell Sea.

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