Unit 9, Lopez de Bertodano FM., Seymour Island (Cretaceous of Antarctica)

Where: Seymour Island, Antarctica (64.3° S, 56.8° W: paleocoordinates 62.5° S, 67.5° W)

• small collection-level geographic resolution

When: Lopez de Bertodano Formation, Maastrichtian (72.1 - 66.0 Ma)

• This is restricted to Unit 9, of the 10 units into which the Lopez de Bertodano FM was divided, and it falls below the K-T boundary, though it is ill-defined. This collection is only for Unit 9 taxa collected BELOW the "K/T transition interval", and so is clearly Maastrichtian in age.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, bioturbated, glauconitic, silty sandstone and siltstone

• siltstones, silty concretionary sandstones, glauconitic sandstones, some volcanoclastic component

Size class: macrofossils

Collection methods: bulk,

• All macrofossils were collected

Primary reference: W. J. Zinsmeister, R. M. Feldmann, M. O. Woodburne and D. H. Elliot. 1989. Latest Cretaceous/Earliest Tertiary Transition on Seymour Island, Antarctica. Journal of Paleontology 63(6):731-738 [L. Ivany/E. Kowalski/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 63513: authorized by Linda Ivany, entered by Linda Ivany on 15.08.2006, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Reptilia
  -
Reptilia indet. Laurenti 1768 reptile
 Plesiosauria - Elasmosauridae
Elasmosauridae indet.3 Cope 1869 elasmosaur
IAA Pv 443, an incomplete skeleton comprising the mandibular symphysis and part of right and left mandibular rami, cervical and dorsal centra, an incomplete humerus, radius, ulna, ulnare, intermedium, radiale and distal carpal 1, 2 þ 3 and 4, other fragmentary postcranial bones and associated gastroliths
cf. Aristonectes sp.1 Cabrera 1941 elasmosaur
MLP 89-III-3-1, postcranial skeleton
 Squamata - Mosasauridae
Mosasaurinae indet.2 Gervais 1853 mosasaur
IAA-Pv 819, an almost complete right humerus.
Sedentaria
 Sabellida - Serpulidae
Bivalvia
 Nuculida - Nuculidae
Leionucula suboblonga Wilckens 1907 nut clam
 Nuculanida - Malletiidae
Australoneilo gracilis Wilckens 1907 clam
 Arcida - Cucullaeidae
Cucullaea antarctica Wilckens 1907 clam
 Pectinida - Entoliidae
 Pectinida - Limidae
Seymourtula antarctica Wilckens 1910 file clam
 Ostreida - Gryphaeidae
"Pycnodonte vesiculosa" = Pycnodonte (Phygraea) vesicularis vesiculosa Sowerby 1822 oyster
listed as "Pynodonte", bivalve - typo
 Ostreida - Pinnidae
 Ostreida - Malleidae
 Ostreida - Pteriidae
 Trigoniida - Trigoniidae
"Oistotrigonia regina" = Linotrigonia (Oistotrigonia)
"Oistotrigonia regina" = Linotrigonia (Oistotrigonia) clam
 Hiatellida - Hiatellidae
Panopea clausa Wilckens 1910 clam
 Pholadomyida - Pholadomyidae
 Cardiida - Veneridae
 Cardiida - Lahillidae
Lahillia larseni Sharman and Newton 1897 clam
 Lucinida - Lucinidae
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Gastropoda
 Patellida - Lottiidae
Acmaea sp. Eschscholtz 1830 limpet
 Sorbeoconcha - Naticidae
 Neogastropoda - Fasciolariidae
Fusinus sp. Rafinesque 1815 snail
 Neogastropoda - Tudiclidae
"Heterotrema sp." = Heteroterma
"Heterotrema sp." = Heteroterma Gabb 1869 snail
 Sorbeoconcha - Aporrhaidae
Perissoptera sp. Tate 1865 snail
 Sorbeoconcha - Cassidae
"Cassidaria mirablis" = Galeodea
"Cassidaria mirablis" = Galeodea snail
 Seguenzioidea - Eucyclidae
Cephalopoda
 Ammonitida - Diplomoceratidae
Diplomoceras sp. Hyatt 1900 ammonite
 Ammonitida - Tetragonitidae
Pseudophyllites loryi Kilian and Reboul 1909 ammonite
 Ammonitida - Pachydiscidae
Pachydiscus ultimus Macellari 1986 ammonite
Pachydiscus riccardi Macellari 1986 ammonite
 Ammonitida - Kossmaticeratidae
Maorites densicostatus Kilian and Reboul 1909 ammonite
Malacostraca
 Decapoda - Nephropidae
Hoploparia stokesi Weller 1903 clawed lobster
Metanephrops jenkinsi Feldmann 1989 clawed lobster