Half Three Point assemblage (Cretaceous to of Antarctica)

Where: Antarctica (62.2° S, 59.0° W: paleocoordinates 60.1° S, 69.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Half Three Point Formation, Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; lithified, tuffaceous, muddy mudstone and lithified, tuffaceous, sandy sandstone

• On the basis of the high content of fungal, bryophyte and pteridophyte remains recorded, Shen (1994) considered the plant debris to be autochthonous, and to have been deposited in a lake during a warm (subtropical), humid climatic interval, although those in the braided river deposits will inevitably have been transported some distance from the source flora.
• The plant-bearing beds comprise a short section (c. 4 m) of dark grey tuffs and tuffaceous sandstones, siltstones and mudstones that dip 26ENE. These are finely laminated with normal gradation and intercalations of coal beds in mudstones.

Size class: microfossils

• Other: Palynomorphs

Preservation: soft parts, original sporopollenin

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

Primary reference: T. L. Dutra and D. J. Batten. 2000. Upper Cretaceous floras of King George Island, West Antarctica, and their palaeoenvironmental and phytogeographic implications. Cretaceous Research (21)181-209 [C. Jaramillo/P. Santamarina]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 150237: authorized by Carlos Jaramillo, entered by Patricio Santamarina on 04.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Dyadosporonites
  -
"Dyadosporites "sp."" = Dyadosporonites, Dyadosporites obscurus
"Dyadosporites "sp."" = Dyadosporonites Hammen
Dyadosporites obscurus Song and Cao 1994
Lacrimasporonites
  -
Lacrimasporonites tenuous, Lacrimasporonites scabratus
Lacrimasporonites tenuous Song and Cao 1994
Lacrimasporonites scabratus Song and Cao 1994
Multicellaesporites
  -
Multicellaesporites "sp. 1", Multicellaesporites "sp. 2", Multicellaesporites "sp. 3", ? Multicellaesporites cf. ellipticus, Multicellaesporites cf. ovatus
? Multicellaesporites cf. ellipticus Sheffy and Dilcher 1971
Multicellaesporites cf. ovatus Sheffy and Dilcher 1971
Pluricellaesporites
  -
Pluricellaesporites "sp.", Pluricellaesporites ocellatus, Pluricellaesporites antarcticus
Pluricellaesporites ocellatus Song and Cao 1994
Staphlosporonites
  -
Staphlosporonites "sp."
Staphlosporonites "sp." Sheffy and Dilcher
Diporicellaesporites
  -
? Diporicellaesporites "sp 1", ? Diporicellaesporites "sp. 2", Diporicellaesporites antarcticus, Diporicellaesporites stenosus
Diporicellaesporites stenosus Song and Cao 1994
Dicellaesporites
  -
Dicellaesporites "spp.", Dicellaesporites oblongatus, Dicellaesporites popovii, Dicellaesporites antarcticus
Dicellaesporites oblongatus Song and Cao 1994
Dicellaesporites antarcticus Song and Cao 1994
Inapertisporites
  -
Inapertisporites solidus, Inapertisporites cf. obpyriformis
Inapertisporites solidus Song and Cao 1994
Inapertisporites cf. obpyriformis Sheffy and Dilcher 1977
Bivalvia
 Mytilida - Mytilidae
Dacrydium "sp."
Dacrydium "sp." Torell 1859 mussel
 Anthophyta -
Cranwellia "sp."
Cranwellia "sp." Srivastava 1966
Equisetopsida
 Anthocerotidae - Anthocerotidae
Foraminisporis dailyi
Foraminisporis dailyi Dettmann 1963
 Pinidae - Pinidae
Araucariacites "sp.", Araucariacites australis
Araucariacites "sp." Cookson and Couper 1953
Sphenopteridae
  - Sphenopteridae
Sphenopteris "sp."
Sphenopteris "sp." Sternberg 1825
Angiospermae
 Fagales - Nothofagaceae
Nothofagus "sp."
Nothofagus "sp." Blume 1850
similar to N. magelhaenica
 Fagales -
Nothofagidites "sp.", Nothofagidites cf. endurus, Nothofagidites cf. senectus, Nothofagidites cf. brachyspinulosus, Nothofagidites cf. rocaensis
Nothofagidites "sp." Potonié 1960
Nothofagidites cf. endurus Stover and Evans 1973
Nothofagidites cf. senectus Dettmann and Playford 1968
 Malpighiales - Euphorbiaceae
Tricolporopollenites "sp. 1", Tricolporopollenites "sp. 2"
Tricolporopollenites "sp. 1" Thomson and Pflug 1953 spurge
Tricolporopollenites "sp. 2" Thomson and Pflug 1953 spurge
 Proteales - Proteaceae
Triporopollenites "sp."
Triporopollenites "sp." Pflug and Thomson 1953
 Santalales - Loranthaceae
Gothanipollis bassensis
Gothanipollis bassensis Stover 1973 mistletoe
 Coniferales - Podocarpaceae
Podocarpus "sp.", Podocarpus fildesensis, Podocarpidites ellipticus, Phyllocladidites "sp.", Microcachryidites "sp."
Podocarpus "sp." L'Heritier and Persoon 1807 podocarp
Podocarpus fildesensis Zhou 1994 podocarp
Podocarpidites ellipticus Cookson 1947 podocarp
Phyllocladidites "sp." Cookson 1947 podocarp
Microcachryidites "sp." Cookson 1947 podocarp
Pinopsida
 Pinales - Taxaceae
? Abietineaepollenites microalatus
Magnoliopsida
  -
Dicotylophyllum "sp."
Dicotylophyllum "sp." Saporta 1894
=Dicotylophyllum sp. 2 of Li & Song in Zhou & Li, 1994
Gnetaceaepollenites
  -
Gnetaceaepollenites "sp."
Gnetaceaepollenites ellipticus
  -
Gnetaceaepollenites ellipticus
Lycopodiopsida
 Selaginellales - Selaginellaceae
Neoraistrickia truncata
Neoraistrickia truncata Potonié 1956 spikemoss
 Isoetales - Isoetaceae
Echinosporis "sp. 1", Echinosporis "sp. 2"
Echinosporis "sp. 1" Krutzsch 1967 clubmoss
Echinosporis "sp. 2" Krutzsch 1967 clubmoss
Marchantiopsida
 Sphaerocarpales -
Aequitriradites spinulosus
Aequitriradites spinulosus Cookson and Dettmann 1958
Sphagnaceae
  - Sphagnaceae
Sphagnumsporites "sp."
Cibotiumspora
  -
Cibotiumspora "sp."
Lycopsida
  -
Foveotriletes scrobiculatus
Pteridopsida
  -
Osmundacidites "sp.", Leiotriletes "sp. 1", Leiotriletes "sp. 2", Cyathidites "sp.", Cyathidites minor, Cyathidites cf. minor, Cyathidites pulchellus, Deltoidospora "sp.", Deltoidospora microlepioides, Deltoidospora hallii
Leiotriletes "sp. 1" Potonie and Kremp 1954
Leiotriletes "sp. 2" Potonie and Kremp 1954
Cyathidites "sp." Couper 1953
Cyathidites minor Couper 1953
Cyathidites cf. minor Couper 1953
Deltoidospora "sp." Miner 1935
Polypodiopsida
  -
? Biretisporites "sp."
? Biretisporites "sp." Delcourt et al. 1963
  - Gleicheniaceae
Gleicheniidites "sp.", Gleicheniidites senonicus, Gleicheniidites campanianus, Gleicheniidites fildesensis, Gleicheniidites trivalvis, Gleicheniidites pachydermus, Gleicheniidites cf. delcourtii, Clavifera "sp. 1", Clavifera "sp. 2", Clavifera triplex, Clavifera jachromensis
Gleicheniidites "sp." Dettmann 1963
Clavifera "sp. 1" Bolchovitina 1966
Clavifera "sp. 2" Bolchovitina 1966
Clavifera triplex Bolkhovitina 1966
Clavifera jachromensis Bolkhovitina 1968
  -
Verrucosisporites "sp."
Verrucosisporites "sp." Potonie and Kremp 1954
 Polypodiales - Polypodiidae
Polypodiisporites "sp.", Polypodiisporites favus
 Schizaeales - Polypodiidae
Appendicisporites "sp.", Klukisporites antarcticus, Undulatisporites "sp."
Appendicisporites "sp." Weyland and Greifeld 1953
 Cyatheales - Polypodiidae
Alsophilidites "sp.", Alsophilidites kerguelensis
Alsophilidites "sp." Cookson scaly tree fern
Alsophilidites kerguelensis Cookson 1947 scaly tree fern
 Life -
Baltisphaeridium "sp."
Baltisphaeridium "sp." Eisenack 1958 acritarchs
Asterisporites
  -
Asterisporites "sp."
Asterisporites "sp." Venkatachala and Rawat 1971
Plicifera
  -
Plicifera "sp.", Plicifera trialatus, Plicifera decora, Plicifera delicata
Plicifera "sp." Bolchovitina 1966
Plicifera decora Bolkhovitina 1968
Plicifera delicata Bolchovitina 1968
Involutisporonites
  -
? Involutisporonites crassus
? Involutisporonites crassus Song and Cao 1994
Cupulisporonites megaporus
  -
Cupulisporonites megaporus
Cupulisporonites megaporus Song and Cao 1994
Brachysporisporites
  -
Brachysporisporites "spp."
Brachysporisporites "spp." Song and Cao 1994
Brachysporisporites ovoidus
  -
Brachysporisporites ovoidus
Brachysporisporites ovoidus Song and Cao 1994
Brachysporisporites longovatus
  -
Brachysporisporites longovatus
Brachysporisporites antarcticus
  -
Brachysporisporites antarcticus
Brachysporisporites grandus
  -
Brachysporisporites grandus
Brachysporisporites grandus Song and Cao 1994