Lower (A) Palinozone (Oligocene to of Argentina)

Where: Chubut, Argentina (45.9° S, 67.6° W: paleocoordinates 46.7° S, 60.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Chenque Formation, Late/Upper Oligocene to Late/Upper Oligocene (28.4 - 16.0 Ma)

Environment/lithology: terrestrial; lithified lithology not reported

Size class: microfossils

• Other: Palynomorphs

Preservation: soft parts, original sporopollenin

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

• Repository: Paleobotany and Palinology section, Centro de Investigaciones en Recursos Geológicos (CIRGEO).

•Based on assemblage variations, four informal palynozones are designated in ascending order as follows: Lower (A) Palynozone, Transition (T) Palynozone, Middle (B) Palynozone, Upper (C) Palynozone. The samples was taken from six localities: Chenque hill, Antena hill, Punta Delgada, Playa Las Cuevas and Cañadon Baumann.

Primary reference: V. Barreda. 1997. Palinomorph assemblage of the Chenque Formation, Late Oligocene?- Miocene from Golfo San Jorge Basin, Patagonia, Argentina, Part 1: terrestrial Algae, trilete and monolete spores. Ameghiniana 34(1):69-80 [C. Jaramillo/J. Ceballos/A. Cardenas ]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 143211: authorized by Carlos Jaramillo, entered by Juliana Ceballos on 20.04.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Cingutriletes
  -
Cingutriletes australis Archangelsky 1972
Algae
  - Botryococcaceae
Botryococcus braunii Kutzing 1849
Equisetopsida
 Cupressales - Pinidae
Inaperturopollenites hiatus1 Thomson and Pflug 1953
 Pinidae - Pinidae
Dryadopollis
  -
Dryadopollis minima2 Barreda 1997
Nyssapollenites
  -
Nyssapollenites endobalteus2 Mildenhall and Pocknall 1989
Ginkgoopsida
 Ephedrales -
Striatocolporites
  -
Magnoliopsida
  -
Senipites patagonica2 Barreda 1997
Striatricolporites gamerroi2 Archangelsky 1973
Rhoipites baculatus2 Archangelsky 1973
Rhoipites romeroi2 Baldoni 1987
Dicotyledoneae
  -
"Triorites" minor3 Couper 1953
 Myrtales -
Myrtaceidites verrucosus2 Partridge 1973
Angiospermae
 Caryophyllales - Chenopodiaceae
 Proteales - Proteaceae
Proteacidites obscurus3 Cookson 1950
 Gunnerales -
Tricolpites trioblatus1 Mildenhall and Pocknall 1989
 Poales - Typhaceae
 Poales - Poaceae
Graminidites sp.3 Potonie 1960 bamboo
 Poales - Restionaceae
"Milfordia" argentina3 Barreda 1997
 Mesangiosperms - Arecaceae
Arecipites subverrucatus1 Mildenhall and Pocknall 1989 palm
 Canellales -
Pseudowinterapollis couperi3 Mildenhall 1979 magnoliids
 Fabales - Fabaceae
Margocolporites vanwijhei2 Germeraad et al. 1968 legume
Margocolporites tenuireticulatus2 Barreda 1997 legume
 Fagales -
Nothofagidites saraensis2 Menendez and Caccavari 1975
Nothofagidites acromegacanthus2 Menendez and Caccavari 1975
Nothofagidites flemingii2 Potonie 1960
 Malvales - Tiliaceae
Intratriporopollenites sp.2 Thomson and Pflug 1953
 Coniferales - Podocarpaceae
Dacrycarpites australiensis1 Cookson and Pike 1953 podocarp
Microcachryidites antarcticus1 Couper 1953 podocarp
Lygistepollenites florinii1 Stover and Evans 1973 podocarp
Gamerroites cf. psilasaccus1 Archangelsky 1988 podocarp
Phyllocladidites mawsonii1 Cookson 1947 podocarp
Podocarpidites cf. exiguus1 Harris 1965 podocarp
Podocarpidites cf. ellipticus1 Cookson 1947 podocarp
Podocarpidites rugulosus1 Romero 1977 podocarp
Podocarpidites elegans1 Romero 1977 podocarp
Podocarpidites marwickii1 Couper 1953 podocarp
Pteridopsida
  -
Cyathidites paleospora Alley and Broadbridge 1992
Ischyosporites areapunctatis Barreda 1997
nov. comb.
Polypodiopsida
  - Osmundaceae
Baculatisporites turbioensis Archangelsky 1972
 Polypodiales - Polypodiidae
Polypodiisporites cf. minimus Khan and Martin 1971
Polypodiisporites radiatus Pocknall and Mildenhall 1984
Polypodiisporites inangahuensis Pocknall and Mildenhall 1984
 Salviniales - Polypodiidae
Azolla sp. Lamarck 1783
  - Blechnaceae
Peromonolites vellosus Partridge 1973
  - Dicksoniaceae
  - Gleicheniaceae
  -
Chlorophyceae
  -
Pediastrum sp. Meyen 1829
Quintiniapollis
  -
Canthiumidites bellus
  -
Canthiumidites (aff. Canthiumidites) bellus3 Mildenhall and Pocknall 1989