RV-8200 (Eocene of Antarctica)

Also known as DVP 6/84, RV 8200

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

• coordinate stated in text

• outcrop-level geographic resolution

When: Telm 5 Member (La Meseta Formation), Ypresian (56.0 - 47.8 Ma)

• Ref #8484 divide the formation into 3 units, Unit II begins 400m above the base, and continues upward for approx. 170m. Unit II also known as unit "TELM 5"

•Cucullaea I allomember. "Thinly bedded arkosic sandstone between two shell banks"

•Stratigraphy in Chornogubsky et al. (2009, fig. 2) and other authors.

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; burrowed, silty sandstone and poorly lithified, concretionary, shelly/skeletal sandstone

• Finely laminated beds of silty sandstone, some of which are interbedded with pebbly conglomeratic units interpreted to represent shell banks. The finer-grained beds between the shell banks are finely laminated, and exhibit ripple marks and flaser bedding. Vertical and oblique burrows are common throughout the finer-grained units. Small to large cut-and-fill channel features occur within the sandy silt-stone facies. Prominent slump structures and lenses of gravel are associated with these channels. The shell banks consist of individual beds that range in thickness from .5 to 2m, and extend laterally as much as 1km. The banks are characterized by coarse- to fine-grained, well-sorted arkosic sandstone beds that contain pebble- to cobble-sized clasts. Most of the shell banks are extremely fossiliferous.

Size classes: macrofossils, mesofossils

Collected by IAA, DPV/MLP in the 1982-1990s

Collection methods: sieve,

• Repository: University of California, Riverside

Primary reference: M. O. Woodburne and W. J. Zinmeister. 1982. Fossil Land Mammal from Antarctica. Science 218:284-286 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 31173: authorized by John Alroy, entered by Erin Leckey on 15.04.2003, edited by Mark Uhen and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Phyllophaga indet.1
? Tardigrada or ? Vermilingua indet.
Malacostraca
 Decapoda - Raninidae
Lyreidus antarcticus11 Feldmann and Zinsmeister 1984 crab
Maxillopoda
 Cirripedia -
Cirripedia indet.4 Rafinesque 1816 barnacle
Bivalvia
  -
"Bivalvia indet." = Bivalvia4, "Pelecypoda indet." = Bivalvia11
"Bivalvia indet." = Bivalvia4 Linnaeus 1758 clam
"Pelecypoda indet." = Bivalvia11 Linnaeus 1758 clam
Gastropoda
  -
Gastropoda indet.11 Cuvier 1797 snail
Cephalopoda
 Nautilida - Aturiidae
Aturia sp.11 Bronn 1838 nautiloid
Chondrichthyes
 Elasmobranchii -
Elasmobranchii indet. Bonaparte 1838 elasmobranch
"teeth of sharks"
 Squaliformes - Squalidae
Dalatias licha8 dogfish shark
Squalus weltoni8 Long 1992 dogfish shark
Squalus woodburnei8 Long 1992 dogfish shark
 Squaliformes - Centrophoridae
Centrophorus sp.8 Müller and Henle 1837 gulper shark
 Squatiniformes - Squatinidae
Squatina sp.8 Dumeril 1806 angel shark
 Odontaspidida - Jaekelotodontidae
"Odontaspis rutoti" = Palaeohypotodus rutoti8
"Odontaspis rutoti" = Palaeohypotodus rutoti8 Winkler 1878 elasmobranch
 Hexanchiformes - Hexanchidae
Hexanchidae indet.8 Gray 1851 cow shark
 Lamniformes - Lamnidae
Isurus praecursor4, "Carcharocles auriculatus" = Carcharodon auriculatus8, Lamna cf. nasus8
Isurus praecursor4 Thurmond and Jones 1981 mako shark
"Carcharocles auriculatus" = Carcharodon auriculatus8 Blainville 1818 white shark
Lamna cf. nasus8 mackerel shark
 Lamniformes - Odontaspididae
Odontaspis winkleri8 Leriche 1905 sand tiger shark
 Orectolobiformes - Orectolobidae
 Carchariniformes - Carcharhinidae
Scoliodon sp.8 Muller and Henle 1837 requiem shark
 Pristiophoriformes - Pristiophoridae
Pristiophorus lanceolatus8 Davis 1888 saw shark
Actinopteri
 Teleostei -
Teleostei indet.
vertebrae and teeth of fish
 Labriformes - Labridae
Labridae indet.9 Cuvier 1816
Reptilia
  -
Reptilia indet. Laurenti 1768 reptile
 Testudines - Dermochelyidae
cf. Psephophorus sp.5 von Meyer 1847 leatherback
MLP 92-II-2-113, a fragment of an epithecal plate (DPV 2/84, TELM 4), MLP 94-III-15-28 a fragment of epithecal corace with four plates [Coquine of Miles (DPV 2/84), TELM 3/4]
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
Aves
  -
Aves indet. Linnaeus 1758 bird
 Anseriformes - Presbyornithidae
? Presbyornithidae indet.1 Wetmore 1926 waterfowl
 Procellariiformes - Diomedeidae
Diomedeidae indet.1 Gray 1840 albatross
 Procellariiformes - Procellariidae
Procellariidae indet.1 Vigors 1825 petrel
 Phoenicopteriformes - Phoenicopteridae
cf. Phoenicopteridae indet.1 Bonaparte 1838 flamingo
 Sphenisciformes -
Delphinornis sp.1 Wiman 1905 penguin
 Sphenisciformes - Spheniscidae
Spheniscidae indet. Bonaparte 1831 penguin
Palaeeudyptes gunnari12 Wiman 1905 penguin
 Sphenisciformes -
? Mesetaornis sp.12 Myrcha et al. 2002 penguin
Reptilia
 Loricata -
Crocodylia indet.7 crocodilian
Mammalia
 Mammalia -
 Tribosphenida -
Eutheria indet. eutherian
"probably marine placental mammal"
 Xenarthra -
? Pilosa indet10 edentate
? Tardigrada or ? Vermilingua indet.
 Xenarthra - Megalonychidae
Megalonychidae indet.13 Gervais 1855 edentate
 Theriiformes -
Metatheria indet. Huxley 1880 metatherian
 Polydolopimorphia - Polydolopidae
"Antarctodolops sp." = Antarctodolops4, "Eurydolops seymouriensis" = Antarctodolops4, Antarctodolops mesetaense3, "Antarctodolops dailyi" = Antarctodolops dailyi3, "Antarctodolops dailyi n. gen. n. sp." = Antarctodolops dailyi14, "Eurydolops seymourensis n. gen. n. sp." = Antarctodolops dailyi2
"Antarctodolops sp." = Antarctodolops4 Woodburne and Zinsmeister 1984 metatherian
UCR 20913, an isolated left M2. Could be _A. dailyi_, _A. mesetaense_, or a third species.
"Eurydolops seymouriensis" = Antarctodolops4 metatherian
Antarctodolops mesetaense3 Chornogubsky et al. 2009 metatherian
MLP 88-I-1-3, a right dentary with m2
"Antarctodolops dailyi" = Antarctodolops dailyi3 metatherian
MLP 87-II-1-1, MLP 88-I-1-4, MLP 88-I-1-2, UCR 22355 (holotype of _Eurydolops seymourensis_), UCR 20910 (holotype of _Antarctodolops dailyi_), UCR 20911, UCR 20912
"Antarctodolops dailyi n. gen. n. sp." = Antarctodolops dailyi14 metatherian
"Eurydolops seymourensis n. gen. n. sp." = Antarctodolops dailyi2 metatherian
isolated left P3
 Marsupialia -
Marambiotherium glacialis6 Goin et al. 1999 marsupial
MLP 88-I-1-1
 Microbiotheria - Microbiotheriidae
? Microbiotheriidae indet.1 Ameghino 1887 marsupial
Asteroidea
  -
Asteroidea indet.11 de Blainville 1830 sea star
Brachiopoda
  -
Brachiopoda indet.11 Cuvier 1805
unclassified
  -
Plantae indet.11 Haeckel 1866
Magnoliopsida
 Fagales - Nothofagaceae
Nothofagus sp.4 Blume 1850
leaf impressions and carbon films