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

Dicellaesporites
  -
Pluricellaesporites
  -
Multicellaesporites
  -
Bivalvia
 Mytilida - Mytilidae
Dacrydium "sp." Torell 1859 mussel
Pinopsida
 Pinales - Podocarpaceae
Podocarpus "sp." Lheritier and Persoon 1807
 Pinales - Araucariaceae
Araucariacites "sp." Cookson and Couper 1953
Pteridopsida
  -
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
 Schizaeales -
Appendicisporites "sp." Weyland and Greifeld 1953
 Schizaeales - Schizaeaceae
 Gleicheniales - Gleicheniaceae
 Cyatheales - Cyatheaceae
 Polypodiales -
  -
Cibotiumspora
  -
Verrucosisporites
  -
Verrucosisporites "sp." Potonie and Kremp 1954
Lycopsida
  -
  - Selaginellaceae
  - Isoetaceae
Echinosporis "sp. 1" Krutzsch 1967
Echinosporis "sp. 2" Krutzsch 1967
Marchantiopsida
 Sphaerocarpales -
Aequitriradites spinulosus Cookson and Dettmann 1961
Foraminisporis
  -
Foraminisporis dailyi Dettmann 1963
Sphagnaceae
  - Sphagnaceae
Dicotyledonae
 Euphorbiales - Dilleniidae
Tricolporopollenites "sp. 1" Thomson and Pflug 1953
Tricolporopollenites "sp. 2" Thomson and Pflug 1953
Magnoliopsida
  -
Dicotylophyllum "sp." Saporta
=Dicotylophyllum sp. 2 of Li & Song in Zhou & Li, 1994
 Santalales - Loranthaceae
 Proteales - Proteaceae
Triporopollenites "sp." Pflug and Thomson 1953
 Fagales - Nothofagaceae
Nothofagus "sp." Blume 1850
similar to N. magelhaenica
 Fagales -
Nothofagidites "sp." Potonié 1960
Nothofagidites cf. senectus Dettmann and Playford 1968
Nothofagidites cf. endurus Stover and Evans 1973
Sphenopteridae
  - Sphenopteridae
Sphenopteris "sp." Sternberg 1825
Diporicellaesporites
  -
Lacrimasporonites
  -
Lacrimasporonites scabratus Song and Cao 1994
Lacrimasporonites tenuous Song and Cao 1994
 Gymnospermophyta -
Inapertisporites
  -
Inapertisporites cf. obpyriformis Sheffy and Dilcher 1977
Inapertisporites solidus Song and Cao 1994
Asterisporites
  -
Asterisporites "sp." Venkatachala and Rawat 1971
Dinophyceae
  -
Baltisphaeridium "sp." Eisenack 1958
Dyadosporites
  -
Dyadosporites obscurus Song and Cao 1994
Brachysporisporites
  -
Brachysporisporites "spp." Song and Cao 1994
Brachysporisporites antarcticus
  -
Brachysporisporites ovoidus
  -
Brachysporisporites ovoidus Song and Cao 1994
Brachysporisporites grandus
  -
Brachysporisporites grandus Song and Cao 1994
Brachysporisporites longovatus
  -
Cupulisporonites megaporus
  -
Cupulisporonites megaporus Song and Cao 1994
Plicifera
  -
Plicifera "sp." Bolchovitina 1966
Plicifera decora Bolkhovitina 1968
Plicifera delicata Bolchovitina 1968
Involutisporonites
  -
? Involutisporonites crassus Song and Cao 1994