La Meseta Fm Telm 2 (Eocene of Antarctica)

Where: Seymour Island, Antarctica (64.3° S, 56.8° W: paleocoordinates 63.4° S, 63.9° W)

• coordinate stated in text

• basin-level geographic resolution

When: Telm 2 Member (La Meseta Formation), Ypresian (56.0 - 47.8 Ma)

• formation-level stratigraphic resolution

Environment/lithology: coastal; unlithified, fine-grained, concretionary, silty, calcareous sandstone and gray, silty claystone

• rare shell beds

•fine stratification

•muddy

•"thick beds of laminated, fine-grained sand and silty sands with sparse, silty, clay beds. The sands are typically flaser-bedded and convolute laminated; these alternate with dark grey, friable mudstones which coarsen upward. Some horizons contain iron-rich and moderately well-indurated sandstone and siltstone intervals."

•fossils not common but locally abundant in calcareous silty intervals

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, surface (float), surface (in situ),

Primary reference: J. D. Stilwell and W. J. Zinsmeister. 1992. Molluscan Systematics and Biostratigraphy. Antarctic Research Series, AGU 55 [L. Ivany/L. Ivany/M. Uhen]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 63548: authorized by Linda Ivany, entered by Linda Ivany on 16.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Mollusks only
Bivalvia
 Nuculanida - Malletiidae
Australoneilo rossi Zinsmeister 1984 clam
 Nuculida - Nuculidae
Nucula (Leionucula) nova Wickens 1911 nut clam
 Mytilida - Mytilidae
 Ostreida - Ostreidae
Ostrea antarctica Zinsmeister 1984 oyster
 Ostreida - Pteriidae
Electroma notiala Stilwell and Zinsmeister 1992 pearl oyster
 Pectinida - Limidae
Acesta bibbyi n. sp. Stilwell and Zinsmeister 1992 file clam
 Arcida - Cucullaeidae
 Carditida - Crassatellidae
Eucrassatella wilckensi Median and Rinaldi 1978 clam
 Thraciida - Periplomatidae
 Cardiida - Lahillidae
Lahillia wilckensi Zinsmeister 1984 clam
 Cardiida - Mactridae
Mactra irizari Wilckens 1912 clam
Nymphactra jonasseni n. gen. n. sp. Stilwell and Zinsmeister 1992 clam
 Cardiida - Veneridae
"Cyclorismina" marwicki Zinsmeister 1984 venus clam
Eurhomalea newtoni Wilckens 1911 venus clam
Cockburnia lunulifera Wilckens 1911 venus clam
 Cardiida - Sportellidae
 Lucinida - Lucinidae
Saxolucina sharmani Wilckens 1911 clam
Scaphopoda
 Gadilida - Gadilidae
Gastropoda
 Opisthobranchia - Cylichnidae
 Opisthobranchia - Bullidae
 Heterostropha - Acteonidae
 Heterostropha - Pyramidellidae
Agatha scotti n. sp., "Turbonilla (Ptycheulimella) aersispira n. sp." = Ptycheulimella
Agatha scotti n. sp. snail
"Turbonilla (Ptycheulimella) aersispira n. sp." = Ptycheulimella snail
 Heterostropha - Mathildidae
"Gegania (Tubena) antarctodema n. sp." = Gegania
"Gegania (Tubena) antarctodema n. sp." = Gegania snail
 Neotaenioglossa - Calyptraeidae
Zegalerus coniculus n. sp. slipper shell
 Sorbeoconcha - Struthiolariidae
Antarctodarwinella ellioti Zinsmeister 1976 snail
 Sorbeoconcha - Ficidae
Austroficopsis wimani n. gen. n. sp., Austroficopsis seymourensis n. gen. n. sp.
Austroficopsis wimani n. gen. n. sp. Stilwell and Zinsmeister 1992 fig shell
Austroficopsis seymourensis n. gen. n. sp. Stilwell and Zinsmeister 1992 fig shell
 Neogastropoda - Costellariidae
Austrosullivania lata n. gen. n. sp. ribbed mitre
Conomitra cernohorskyi n. sp. ribbed mitre
Conomitra iredalei n. sp. ribbed mitre
 Neogastropoda - Muricidae
Lenitrophon suteri n. sp., Caelobassus radwini n. gen. n. sp.
Lenitrophon suteri n. sp. murex snail
Caelobassus radwini n. gen. n. sp. Stilwell and Zinsmeister 1992 murex snail
 Neogastropoda - Volutidae
Lyria antarctica n. sp., Eoscaphella fordycei n. gen. n. sp.
Lyria antarctica n. sp. Stilwell and Zinsmeister 1992 volute
Eoscaphella fordycei n. gen. n. sp. Stilwell and Zinsmeister 1992 volute
 Neogastropoda - Borsoniidae
Zemacies finlayi n. sp. snail
 Neogastropoda - Turridae
Gemmula askinae n. sp. turrid
 Neogastropoda - Nassariidae
Sudonassarius antarctohimaleos n. gen. n. sp. Stilwell and Zinsmeister 1992 snail
 Neogastropoda - Buccinidae
Pseudofax weddellensis n. sp. true whelk
Pseudofax suroinflatus n. sp. true whelk
Austrobuccinum tuberosum n. gen. n. sp. Stilwell and Zinsmeister 1992 true whelk
Eobuccinella brucei n. gen. n. sp. Stilwell and Zinsmeister 1992 true whelk
Aeneator delli n. sp. true whelk
Aeneator huttoni n. sp. true whelk
Penion australocapax n. sp. true whelk
Pareuthria mccormicki n. sp. true whelk
Zelandiella verrucosa n. sp. true whelk
 Neogastropoda - Fasciolariidae
Taioma bicarinata n. sp. snail
 Neogastropoda - Mitridae
Mitra (Eumitra) monoplicata n. sp. mitre shell
Mitra (Eumitra) sadleri n. sp. mitre shell
 Sorbeoconcha - Vermetidae
Serpulorbis hormathos n. sp. worm shell
 Sorbeoconcha - Naticidae
Polinices (Polinices) cf. subtenuis Ihering 1907 moon snail
 Cerithioidea - Turritellidae
Colposigma euthenia n. sp. Stilwell and Zinsmeister 1992 turret shell
 Trochoidea - Trochidae
 Ptenoglossa - Vasidae
Tudicla doylei n. sp. snail