IAA 1/13 (Eocene of Antarctica)

Also known as NRM locality 7, Channel Site

Where: Antarctica (64.2° S, 56.6° W: paleocoordinates 63.4° S, 63.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Acantilados II Member (La Meseta Formation), Ypresian (56.0 - 47.8 Ma)

• "The fossiliferous level is equivalent to Acantilados II with its base dated as 55.3 Ma (Ivany et al. 2008; Montes et al. 2013), representing a fraction of the earliest Eocene epoch."

•"basal marine shell layer of the Acantilados II Allomember of La Meseta Formation"

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; calcareous siltstone

• "outer and middle estuary"

Size classes: macrofossils, mesofossils

Collected by 2012-2013

• MLP, Division Paleontologıa de Vertebrados, Museo de La Plata, La Plata, Argentin

Primary reference: J. N. Gelfo, T. Mors, M. Lorente, G. M. Lopez, and M. Reguero. 2015. The oldest mammals from Antarctica, Early Eocene of the La Meseta Formation, Seymour Island. Palaeontology 58(1):101-110 [M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175618: authorized by Richard Butler, entered by Richard Butler on 20.12.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Brachiopoda
 Brachiopoda -
Bivalvia
 Arcida - Cucullaeidae
Cucullaea sp. Lamarck 1801 clam
Aves
 Sphenisciformes -
Sphenisciformes indet. Sharpe 1891 penguin
"penguin bones"
Mammalia
 Tribosphenida -
Eutheria indet. Huxley 1880 eutherian
MLP 13-I-25-2 intermediate phalanx
 Panameriungulata - Sparnotheriodontidae
Notiolofos cf. arquinotiensis Bond et al. 2006 placental
MLP 13-I-25-1 fragment of a brachyodont lower right molar
Gnathostomata
  -
Chondrichthyes indet. Huxley 1880 cartilaginous fish
"shark and ray teeth"