Locality 1104 - Sobral Fm, Seymour Island: Danian, Antarctica

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda
Scaphopoda indet. Bronn 1862
3 specimens
Gastropoda - Pleurotomariidae
Conotomaria informal sp. C Cox 1959
1 specimen
Gastropoda - Turritellidae
Mesalia virginiae Stilwell et al. 2004
1 specimen
Gastropoda - Neogastropoda - Fasciolariidae
Taioma sobrali Stilwell et al. 2004
1 specimen
"Paleopsephaea" nodoprosta n. sp. Stilwell et al. 2004
1 specimen
Gastropoda - Neogastropoda - Buccinidae
Seymourosphaera depressa Olenik and Zinsmeister 1996
2 specimens
Gastropoda - Neogastropoda - Melongenidae
Serrifusus binodosum Stilwell et al. 2004
1 specimen
Gastropoda - Neogastropoda - Pyropsidae
Pyropsis australis n. sp. Stilwell et al. 2004
1 specimen
Gastropoda - Neogastropoda - Conidae
Marshallaria variegata n. sp. Stilwell et al. 2004
2 specimens
Gastropoda - Neogastropoda - Volutidae
Zygomelon apheles n. sp. Stilwell et al. 2004
1 specimen
Gastropoda - Neogastropoda - Tudiclidae
"Heterotrema" sp. (Gabb 1869)
1 specimen
original and current combination Heteroterma
Gastropoda - Aporrhaidae
Struthiochenopus hurleyi Stilwell et al. 2004
37 specimens
Bivalvia - Nuculanida - Malletiidae
Australoneilo gracilis (Wilckens 1905)
1 specimen
Bivalvia - Nuculida - Nuculidae
Nucula (Leionucula) hunickeni Zinsmeister and Macellari 1988
1 specimen
see common names

Geography
Country:Antarctica
Coordinates: 64.3° South, 56.8° West (view map)
Paleocoordinates:63.1° South, 66.7° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Paleocene
Stage:Danian 10 m.y. bin:Cenozoic 1
Key time interval:Danian
Age range of interval:66.00000 - 61.60000 m.y. ago
Stratigraphy
Formation:Sobral
Regional section:Seymour Island Regional bed:1375.46 m
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Sobral Formation, which unconformably overlues the Lopez de Bertodana Fm (Late Maastrichtian-Danian) and is overlain by the La Meseta Fm. THICKNESS: Section reachs 1600 m in thickness, presumably collection is from a horizon of bed-scale thickness. AGE: Early Danian. STRATIGRAPHIC POSITION: 1375.46 m
Lithology and environment
Primary lithology:gray poorly lithified silty sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Gray-tan, fine-grained, silty sandstone. LITHIFICATION: Poorly-lithified, on the basis of figured specimens.
Environment:offshore
Geology comments: ENVIRONMENT: Sandy, shallow-middle shelf, temperate coastal waters, normal salinity.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Articulated whole bodies:many
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection method comments: COLLECTORS: Stilwell and Zinsmeister. REPOSITORY: Most all material is reposited in USNM collections.
Taxonomic list comments:COVERAGE: Exhaustive for bivalvia and gastropoda. NOMENCLATURE: Authoritative publication with consistent use of species and subgenus designations, and with biogeographic consideration.
Metadata
Database number:67036
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2006-11-04 22:29:10 Last modified:2013-11-25 13:37:23
Access level:group members Released:2006-11-04 22:29:07
Creative Commons license:CC BY
Reference information

Primary reference:
19080. J. D. Stilwell, W. J. Zinsmeister, and A. E. Oleinik. 2004. Early Paleocene Mollusks of Antarctica: Systematics, Paleoecology and Paleobiogeographic Significance. Bulletins of American Paleontology 367 [A. Hendy/A. Hendy]