RV-8200, Seymour Island: Bartonian - Priabonian, Antarctica
collected by IAA, DPV/MLP 1982-1990
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Invertebrata indet.
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Phyllophaga indet.
(Flower 1883)
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Bargo and Reguero 1998 | 1 specimen | ||||||||
? Tardigrada or ? Vermilingua indet. | ||||||||||
= ? Pilosa indet.
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MacPhee and Reguero 2010 | |||||||||
"A second possible xenarthran from the La Meseta Fm of Seymour, a distal phalanx [MLP 88-I-1-95; DPV 6/84] possibly of vermilinguan or tardigradan affin- ity [Marenssi et al., 1994; Bargo and Reguero, 1998], cannot now be located in the MLP collections and therefore cannot be evaluated in this paper." | ||||||||||
Plantae indet.
Haeckel 1866
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Marenssi et al. 1994 | |||||||||
Angiospermae
- Fagales
- Nothofagaceae
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Nothofagus sp.
Blume 1850
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Cione and Reguero 1994 | 18 specimens | ||||||||
leaf impressions and carbon films | ||||||||||
Thecostraca
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Cirripedia indet.
(Rafinesque 1816)
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Cione and Reguero 1994 | |||||||||
Malacostraca
- Decapoda
- Lyreididae
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Lyreidus antarcticus
Feldmann and Zinsmeister 1984
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Marenssi et al. 1994 | |||||||||
unclassified
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Brachiopoda indet.
Cuvier 1805
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Marenssi et al. 1994 | |||||||||
Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Cione and Reguero 1994 | |||||||||
Pelecypoda indet.
Goldfuss 1820
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Marenssi et al. 1994 | |||||||||
synonym of Bivalvia | ||||||||||
Gastropoda
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Gastropoda indet.
Cuvier 1795
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Marenssi et al. 1994 | |||||||||
Cephalopoda
- Nautilida
- Nautilidae
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Eutrephoceras argentinae
Del Valle and Fourcade 1976
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Zinsmeister 1987 | |||||||||
recombined as Euciphoceras argentinae | ||||||||||
Cephalopoda
- Nautilida
- Aturiidae
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Aturia sp.
Bronn 1838
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Zinsmeister 1987 | |||||||||
Reptilia
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Reptilia indet.
Laurenti 1768
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Aves indet.
Linnaeus 1758
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Reptilia
- Sphenisciformes
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Sphenisciformes indet.
Sharpe 1891
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penguins | ||||||||||
Reptilia
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Delphinornis sp.
Wiman 1905
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Bargo and Reguero 1998 | 1 specimen | ||||||||
? Mesetaornis sp.
Myrcha et al. 2002
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Myrcha et al. 2002 | 1 specimen | ||||||||
Reptilia
- Spheniscidae
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Palaeeudyptes gunnari
(Wiman 1905)
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Myrcha et al. 2002 | 1 specimen | ||||||||
Reptilia
- Procellariidae
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Procellariidae indet.
Vigors 1825
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Bargo and Reguero 1998 | 2 specimens | ||||||||
Reptilia
- Diomedeidae
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Diomedeidae indet.
Gray 1840
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Bargo and Reguero 1998 | 1 specimen | ||||||||
Reptilia
- Anseriformes
- Presbyornithidae
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? Presbyornithidae indet.
Wetmore 1926
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Bargo and Reguero 1998 | 1 specimen | ||||||||
Reptilia
- Phoenicopteriformes
- Phoenicopteridae
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cf. Phoenicopteridae indet.
Bonaparte 1838
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Bargo and Reguero 1998 | 1 specimen | ||||||||
Reptilia
- Crocodylia
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Crocodylia indet.
(Owen 1842)
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Laurent et al. 2002 | 1 specimen | ||||||||
Reptilia
- Testudines
- Dermochelyidae
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cf. Psephophorus sp.
von Meyer 1847
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de la Fuente et al. 1995 | |||||||||
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] | ||||||||||
Reptilia
- Testudines
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Chelonia indet.
(Latreille 1800)
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synonym of Testudines | ||||||||||
Mammalia
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Mammalia indet.
(Linnaeus 1758)
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Bargo and Reguero 1998 | 1 specimen | ||||||||
Eutheria indet.
(Huxley 1880)
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"probably marine placental mammal" | ||||||||||
Mammalia
- Megalonychidae
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Megalonychidae indet.
Gervais 1855
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Vizcaíano and Scillato-Yané 2004 | |||||||||
Mammalia
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Metatheria indet.
(Huxley 1880)
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Mammalia
- Microbiotheria
- Microbiotheriidae
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? Microbiotheriidae indet.
(Ameghino 1887)
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Bargo and Reguero 1998 | 1 specimen | ||||||||
Mammalia
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Microbiotheriidae indet.
(Ameghino 1887)
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Goin and Carlini 1995 | |||||||||
MLP 88-I-1-1 | ||||||||||
= Marambiotherium glacialis
Goin et al. 1999
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Goin et al. 1999 | |||||||||
MLP 88-1-1-1, an edentulous left mandibular ramus with the alveoli for p3-m4 | ||||||||||
Mammalia
- Polydolopidae
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Antarctodolops sp.
Woodburne and Zinsmeister 1984
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Cione and Reguero 1994 | 1 specimen | ||||||||
UCR 20913, an isolated left M2. Could be _A. dailyi_, _A. mesetaense_, or a third species. | ||||||||||
Eurydolops seymouriensis
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Cione and Reguero 1994 | |||||||||
synonym of Antarctodolops | ||||||||||
Antarctodolops mesetaense
Chornogubsky et al. 2009
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Chornogubsky et al. 2009 | 1 specimen | ||||||||
MLP 88-I-1-3, a right dentary with m2 | ||||||||||
Polydolopidae indet.
Ameghino 1897
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3 specimens | |||||||||
= Antarctodolops dailyi n. gen., n. sp.
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Woodburne and Zinsmeister 1984 | |||||||||
right mandible fragment with p3-m1, maxillary fragment with partial alveolus, maxillary fragment with complete LM2 | ||||||||||
Antarctodolops dailyi
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Chornogubsky et al. 2009 | 7 specimens | ||||||||
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 | ||||||||||
Eurydolops seymourensis n. gen., n. sp.
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Case et al. 1988 | 1 specimen | ||||||||
synonym of Antarctodolops dailyi | ||||||||||
isolated left P3 | ||||||||||
Actinopteri
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Teleostei indet.
Müller 1846
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vertebrae and teeth of fish | ||||||||||
Actinopteri
- Labriformes
- Labridae
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Labridae indet.
(Cuvier 1816)
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Long 1992 | |||||||||
Chondrichthyes
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Elasmobranchii indet.
Bonaparte 1838
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"teeth of sharks" | ||||||||||
Chondrichthyes
- Squalidae
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Squalus woodburnei
Long 1992
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Long 1992 | |||||||||
Squalus weltoni
Long 1992
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Long 1992 | |||||||||
Chondrichthyes
- Centrophoridae
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Centrophorus sp.
Müller and Henle 1837
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Long 1992 | |||||||||
Chondrichthyes
- Dalatiidae
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Dalatias licha
(Bonnaterre 1788)
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Long 1992 | |||||||||
Chondrichthyes
- Squatinidae
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Squatina sp.
Dumeril 1806
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Long 1992 | |||||||||
Chondrichthyes
- Squalomorphii
- Pristiophoridae
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Pristiophorus lanceolatus
(Davis 1888)
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Long 1992 | |||||||||
recombined as Pristiophorus lanceolata | ||||||||||
Chondrichthyes
- Squalomorphii
- Hexanchidae
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Hexanchidae indet.
Gray 1851
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Long 1992 | |||||||||
Chondrichthyes
- Carcharhiniformes
- Carcharhinidae
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Scoliodon sp.
Muller and Henle 1837
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Long 1992 | |||||||||
Chondrichthyes
- Orectolobiformes
- Stegostomatidae
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Stegostoma cf. varium
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Long 1992 | |||||||||
Chondrichthyes
- Lamniformes
- Lamnidae
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Isurus praecursor
Thurmond and Jones 1981
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Cione and Reguero 1994 | 2 specimens | ||||||||
Carcharocles auriculatus
(Blainville 1818)
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Long 1992 | |||||||||
recombined as Carcharodon auriculatus | ||||||||||
Lamna cf. nasus
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Long 1992 | |||||||||
Chondrichthyes
- Lamniformes
- Odontaspididae
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Odontaspis winkleri
Leriche 1905
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Long 1992 | |||||||||
Odontaspis rutoti
(Winkler 1878)
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Long 1992 | |||||||||
recombined as Palaeohypotodus rutoti | ||||||||||
Asteroidea
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Asteroidea indet.
de Blainville 1830
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Marenssi et al. 1994 | |||||||||
see common names |
Geography
Country: | Antarctica |
Coordinates: | 64.2° South, 56.6° West (view map) |
Paleocoordinates: | 64.2° South, 59.1° West |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Paleogene | Epoch: | Eocene |
10 m.y. bin: | Cenozoic 3 | ||
*Period: | Tertiary | *Epoch: | Eocene - Oligocene | *Local age/stage: | Casamayoran - Divisaderan |
Key time interval: | Bartonian - Priabonian | ||
Age range of interval: | 41.30000 - 33.90000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | La Meseta | Member: | Telm 5 | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: From Telm5 or the Cucullaea I allomember. The age model for the La Meseta Formation (and recently-defined Submeseta Formation) is controversial. Strontium isotopes (Ivany et al., 2008) suggest earlier ages, with the La Meseta (Telm1-Telm5) almost entirely Ypresian and the Submeseta (Telm6-Telm7) Middle-Late Eocene. Montes et al. (2013) also created an age model incorporating magnetostratigraphy to support the largely-Ypresian age for the La Meseta and Middle-Late Eocene for the Submeseta. Some mammals are similar to the radiometrically-constrained late early Eocene Paso del Sapo assemblage of Patagonia (Gelfo et al., 2009, Tejedor et al., 2009), but the mammals are not exactly similar (Bond et al., 2011). However, Douglas et al. (2014) re-evaluated the strontium data and used dinoflagellate biostratigraphy to argue for a Lutetian (Telm2-4) and younger (Bartonian to mid-Priabonian for Telm5-6) age range. Amenábar et al. (2019) also found younger ages from dinoflagellates: Lutetian (Telm1-mid Telm 3), Bartonian (mid Telm 3-mid Telm 5), and Priabonian (upper Telm 5), SPDZ10-SPDZ13. This age range is more consistent with the presence of basilosaurid whales in Telm4 and Telm7, as basilosaurids are globally-distributed first in the middle Eocene (Buono et al., 2016). Although the ages are still debated, the dinoflagellate age model of Amenábar et al. (2019) is used here. |
Lithology and environment
Primary lithology: | current ripples,wavy/flaser/lenticular bedding,deformed bedding,burrows silty sandstone |
Secondary lithology: | concretionary,shelly/skeletal poorly lithified sandstone |
Includes fossils? | Y |
Lithology description: 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 siltstone 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. | |
Environment: | paralic indet. |
Geology comments: The environment of deposition of this complex unit has been subject to different interpretations, all agreeing in general that Telm5 represents a shallow-marine setting. A study by Wiedman and Feldmann (1988) on the ichnofossil fauna and depositional environment of the La Meseta Formation concluded that the Telm5 setting was a littoral to very shallow sublittoral clastic marine terrain, definitely above storm base and most probably above normal wave base. They agreed with Elliot and Trautrnan (1982) that Units II and III probably represent a tidally dominated environment, but evidence from sedimentary structures is also consistent with a barrier bar model and does not represent a shallowing upward sequence. Elliot and Trautman (1982) favored a deltaic model. The analysis of trace fossils and body fossils (including vertebrate remains and large, abundant wood fragments) indicates variable nearshore, shallow-marine environments. A scenario for the depositional environment could include a combination ebb-tidal (or possibly flood-tidal) delta-barrier island complex (Stilwell & Zinsmeister, 1992). |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Disassociated minor elements: | some |
Temporal resolution: | time-averaged |
Spatial resolution: | allochthonous |
Collection methods and comments
Collection excludes: | some macrofossils | ||
Collection methods: | sieve,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Collectors: | IAA, DPV/MLP | Collection dates: | 1982-1990s |
Collection method comments: Repository: University of California, Riverside |
Metadata
Also known as: | DVP 6/84, RV 8200 | ||
Database number: | 31173 | ||
Authorizer: | J. Alroy, E. Vlachos, M. Uhen, M. Clapham | Enterer: | E. Leckey, E. Vlachos, M. Uhen, M. Clapham |
Modifier: | G. Varnham | Research group: | marine invertebrate,vertebrate |
Created: | 2003-04-15 17:08:53 | Last modified: | 2022-02-03 05:02:38 |
Access level: | the public | Released: | 2003-04-15 17:08:53 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
8393. | M. O. Woodburne and W. J. Zinmeister. 1982. Fossil Land Mammal from Antarctica. Science 218:284-286 [J. Alroy/E. Leckey/E. Leckey] |
Secondary references:
43660 | C. Acosta Hospitaleche and N. Haidr. 2011. Penguin cranial remains from the Eocene La Meseta Formation, Isla Marambio (Seymour Island), Antarctic Peninsula. Antarctic Science 23(4):369-378 [M. Uhen/M. Uhen] | |
34464 | M. S. Bargo and M. A. Reguero. 1998. Annotated catalogue of the fossil vertebrates from Antarctica housed in the Museo de la Plata, Argentina. I. Birds and Land Mammals from La Meseta Formation (Eocene - Early Oligocene). Associacion Paleontologica Argentina, Publicacion Especial 5:211-221 [M. Uhen/M. Uhen] | |
57889 | J. A. Case. 1988. Paleogene floras from Seymour Island, Antarctic Peninsula. Geology and Paleontology of Seymour Island Antarctic Peninsula 523-540 [J. Zijlstra/J. Zijlstra] | |
8487 | 5% 21560 | J. C. Case, M. O. Woodburne, and D. S. Chaney. 1988. A new genus of polydolopid marsupial from Antarctica. Geological Society of America Memoir 169:505-521 [J. Alroy/E. Leckey/E. Leckey] |
57792 | L. Chornogubsky, F. J. Goin, and M. Reguero. 2009. A reassessment of Antarctic polydolopid marsupials (Middle Eocene, La Meseta Formation). Antarctic Science 21(3):285-297 [J. Zijlstra/J. Zijlstra] | |
47944 | A. L. Cione and M. A. Reguero. 1994. New records of the sharks Isurus and Hexanchus from the Eocene of Seymour Island, Antarctica. Proceedings of the Geologists' Association 105:1-14 [M. Uhen/M. Uhen] | |
66662 | M. S. de la Fuente, S. N. Santillana, and S. A. Marensi. 1995. An Eocene leatherback turtle (Cryptodira; Dermochelyidae) from Seymour Island, Antarctica. Studia Geologica Salmanticensia 31:21-34 [E. Vlachos/E. Vlachos] | |
57928 | D. H. Elliot, C. Rinaldi, W. J. Zinsmeister, T. A. Trautman, W. A. Bryant and R. Valle. 1975. Geological investigations on Seymour Island, Antarctic Peninsula. Antarctic Journal 10(4):182-186 [M. Uhen/M. Uhen] | |
46065 | F. J. Goin and A. A. Carlini. 1995. An Early Tertiary Microbiotheriid marsupial from Antarctica. Journal of Vertebrate Paleontology 15(1):205-207 [C. Jaramillo/C. Suarez-Gomez] | |
57522 | F. J. Goin, J. A. Case, M. O. Woodburne, S. F. Vizcaino, and M. A. Reguero. 1999. New Discoveries of "Opposum-like" Marsupials from Antarctica (Seymour Island, Medial Eocene). Journal of Mammalian Evolution 6(4):335-365 [R. Butler/R. Butler] | |
38065 | Y. Laurent, H. Tong, and J. Claude. 2002. New side-necked turtle (Pleurodira: Bothremydidae) from the Upper Maastrichtian of the Petites-Pyrenees (Haute-Garonne, France). Cretaceous Research 23:465-471 [P. Mannion/P. Mannion] | |
49265 | D. J. Long. 1992. Sharks from the La Meseta Formation (Eocene), Seymour Island, Antarctic Peninsula. Journal of Vertebrate Paleontology 12(1):11-32 [M. Uhen/J. Villari/M. Uhen] | |
62653 | D. J. Long. 1992. An Eocene wrasse (Perciformes; Labridae) from Seymour Island. Antarctic Science 4(2):235-237 [M. Uhen/M. Uhen] | |
57834 | R. D. E. MacPhee and M. Reguero. 2010. Reinterpretation of a Middle Eocene record of Tardigrada (Pilosa, Xenarthra, Mammalia) from La Meseta Formation, Seymour Island, West Antarctica. American Museum Novitates 3689:1-21 [J. Zijlstra/J. Zijlstra] | |
14457 | S. A. Marenssi, M. A. Regeuro, S. N. Santillana and S. F. Vizcaino. 1994. Eocene land mammals from Seymour Island, Antarctica: palaeobiogeographical implications. 6(1):3-15 [M. Uhen/M. Uhen/M. Uhen] | |
19675 | 5% 56120 | A. Myrcha, P. Jadwiszczak, C. P. Tambussi, J. I. Noriega, A. Gazdzicki, A. Tatur, and R. A. Valle. 2002. Taxonomic revision of Eocene Antarctic penguins based on tarsometatarsal morphology. Polish Polar Research 23(1):5-46 [M. Uhen/M. Uhen/M. Uhen] |
61035 | S. F. Vizcaíano and G. J. Scillato-Yané. 2004. An Eocene tardigrade (Mammalia, Xenarthra) from Seymour Island, West Antarctica. 7(4):407-408 [M. Uhen/K. Williams] | |
8484 | M. O. Woodburne and W. J. Zinsmeister. 1984. The first land mammal from Antarctica and its biogeographic implications. Journal of Paleontology 58(4):913-948 [J. Alroy/E. Leckey/M. Uhen] | |
59804 | W. J. Zinsmeister. 1987. Unusual nautilid occurrence in the upper Eocene La Meseta Formation, Seymour Island, Antarctica. Journal of Paleontology 61:724-726 [M. Clapham/M. Clapham] |