PBDB Collection

D3 - San Ramon section (Paleocene of Argentina)

Where: Chubut, Argentina (42.7° S, 69.8° W: paleocoordinates 45.1° S, 58.8° W)

• coordinate estimated from map

When: Lefipán Formation, Danian (66.0 - 61.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: delta front; lithified mudstone

• During the early Danian coarsening-upward cycles reflect accumulation in tidal bars, mainly in a tide to waveinfluenced distal delta-front environment with high sedimentation rates. These deposits bear molluscan faunal associations indicative of recurrent changes from normal marine to low-salinity marine environments with low-oxygen, fine-grained, soupy substrates.

• This bed: Bioturbation- Heterolithic bedding

•The Lefipán Formation consists of marine to marginal marine, fossiliferous sandstones and mudstones with some intercalated coquinas and conglomerates.

Size class: microfossils

• Samples were marine (dinoflagellate cysts)and continental (spores, pollen grains, fungal remains, fresh water algae) palynomorphs.

Preservation: original sporopollenin

Collection methods: chemical,

• Slides are housed in the palynological collection of the Museo Paleontológico Egidio Feruglio, Trelew, Chubut, Argentina (MPEF-Palin)numbers 100 to 113.

Primary reference: V. D. Barreda, N. R. Cúneo, P. Wilf, E. D. Currano, R. A. Scasso and H. Brinkhuis. 2012. Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in Diversity, Low Extinction, and a Classopollis Spike. PLoS ONE 7(12):e52455 [C. Jaramillo/J. Moreno]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 151455: authorized by Carlos Jaramillo, entered by Jessica Moreno on 03.10.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

• Pollen terminology follows Punt et al. 2007.

Show authors, comments, and common names

Pteridopsida
-	Cyathidites patagonicus, Cyathidites australis, Cyathidites minor, Deltoidospora sp. Cyathidites patagonicus Archangelsky 1972 Cyathidites australis Couper 1953 Cyathidites minor Couper 1953 Deltoidospora sp. Miner 1935
Microfoveolatosporis
-	Microfoveolatosporis sp. Microfoveolatosporis sp. Krutzsch 1959
Lycopsida
-	Foveotriletes cf. parvirectus Foveotriletes cf. parvirectus Dettmann 1963
Polypodiopsida
- Gleicheniaceae	Gleicheniidites sp., Gleicheniidites senonicus, Clavifera triplex Gleicheniidites sp. Dettmann 1963 Gleicheniidites senonicus Ross 1949 Clavifera triplex Bolkhovitina 1966
- Dicksoniaceae	Trilites "sp. 2", Trilites volkheimerii, Cyatheacidites annulatus Trilites "sp. 2" Erdtman and Couper 1947 Trilites volkheimerii Filatoff 1975 Cyatheacidites annulatus Cookson 1947
- Polypodiaceae	Laevigatosporites ovatus Laevigatosporites ovatus Wilson and Webster 1946
- Osmundaceae	Rugulatisporites chubutensis Rugulatisporites chubutensis Baldoni 1992
Magnoliopsida
-	Rousea patagonica, Senipites tercrassata, Psilatricolporites "sp. 1", Gemmatricolpites cf. subsphaericus, Haloragacidites harrisii, Retitricolporites "sp. 1", Retitricolporites chubutensis Rousea patagonica Archangelsky 1973 Senipites tercrassata Archangelsky 1973 Psilatricolporites "sp. 1" Pierce 1961 Gemmatricolpites cf. subsphaericus Archangelsky 1973 Haloragacidites harrisii Mildenhall and Harris 1971 Retitricolporites "sp. 1" Van der Hammen and Wymstra 1964 Retitricolporites chubutensis Archangelsky 1973

Coniferales - Podocarpaceae	Phyllocladidites mawsonii, Microcachryidites antarcticus, Gamerroites psilasaccus, Lygistepollenites florinii, Podocarpidites spp., Podocarpidites elegans, Podocarpidites ellipticus Phyllocladidites mawsonii Cookson 1947 podocarp Microcachryidites antarcticus Couper 1953 podocarp Gamerroites psilasaccus Archangelsky 1988 podocarp Lygistepollenites florinii Stover and Evans 1973 podocarp Podocarpidites spp. Cookson 1947 podocarp Podocarpidites elegans Romero 1977 podocarp Podocarpidites ellipticus Cookson 1947 podocarp
Angiospermae
Chloranthales - Chloranthaceae	Clavatipollenites sp. Clavatipollenites sp. Couper 1958
Mesangiosperms - Arecaceae	Spinizonocolpites hialinus, Longapertites aff. vaneendenburgi, Arecipites sp., Arecipites minutiscabratus Spinizonocolpites hialinus Archangelsky and Zamaloa 1986 palm Longapertites aff. vaneendenburgi Geermerad et al. 1968 palm Arecipites sp. Nichols et al. 1973 palm Arecipites minutiscabratus Mc Intyre 1968 palm
Mesangiosperms - Liliaceae	Liliacidites vermireticulatus Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Poales - Typhaceae	Sparganiaceaepollenites sp. Sparganiaceaepollenites sp. Thiergart 1937
Buxales -	Polypodiidites speciosus Polypodiidites speciosus Archangelsky 1972
Gunnerales -	Tricolpites reticulatus Tricolpites reticulatus Couper 1953
Proteales -	Peninsulapollis askiniae, Peninsulapollis gillii Peninsulapollis askiniae Dettmann and Jarzen 1988 Peninsulapollis gillii Dettmann and Jarzen 1988
Proteales - Proteaceae	Lewalanipollis senectus, Triporopollenites minor, Proteacidites "sp. C" Lewalanipollis senectus Dettmann and Jarzen 1996 Triporopollenites minor Barreda 1997 Proteacidites "sp. C" Cookson and Couper 1953
Proteales -	Triatriopollenites lateflexus, Triatriopollenites bertelsii Triatriopollenites lateflexus Archangelsky 1973 Triatriopollenites bertelsii Archangelsky 1973
Aquifoliales - Aquifoliaceae	Ilexpollenites clifdenensis Ilexpollenites clifdenensis McIntyre 1968
Gentianales - Apocynaceae	cf. Cricotriporites sp. cf. Cricotriporites sp. Leidelmeyer 1966 dogbane
Fabales - Fabaceae	Margocolporites sp. Margocolporites sp. Ramanajuan 1966 legume
Malvales - Bombacaceae	Bombacacidites cf. isoreticulatus Bombacacidites cf. isoreticulatus McIntyre 1968
Psilatricolpites
-	Psilatricolpites inargutus Psilatricolpites inargutus Archangelsky 1973
Equisetopsida
Pinidae - Pinidae	Classopollis sp. Classopollis sp. Pflug 1953
Bryopsida
-	Stereisporites "sp. 2", Stereisporites antiquasporites Stereisporites "sp. 2" Pflug 1953 Stereisporites antiquasporites Dettmann 1963