PBDB Collection

D8 - 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: 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 151460: 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

Psilatricolpites
-	Psilatricolpites inargutus Psilatricolpites inargutus Archangelsky 1973
Equisetopsida
Pinidae - Pinidae	Classopollis sp., Araucariacites australis Classopollis sp. Pflug 1953 Araucariacites australis Cookson 1947
Dicotyledoneae
-	Triorites cf. orbiculatus Triorites cf. orbiculatus McIntyre 1965
Ericales - Ericaceae	Ericipites microtectanum Ericipites microtectanum Archangelsky and Zamaloa 1986 heather
Angiospermae
Malvales - Bombacaceae	Bombacacidites cf. isoreticulatus Bombacacidites cf. isoreticulatus McIntyre 1968
Fagales -	Nothofagidites dorotensis, Nothofagidites fuegiensis, Nothofagidites saraensis Nothofagidites dorotensis Romero 1973 Nothofagidites fuegiensis Menéndez and Caccavari 1975 Nothofagidites saraensis Menendez and Caccavari 1975
Gunnerales -	Tricolpites "sp. 1", Tricolpites "sp. 2", Tricolpites reticulatus Tricolpites "sp. 1" Couper 1953 Tricolpites "sp. 2" Couper 1953 Tricolpites reticulatus Couper 1953
Proteales -	Triatriopollenites lateflexus, Triatriopollenites bertelsii, Peninsulapollis "sp. 2", Peninsulapollis cf. truswelliae, Peninsulapollis gillii Triatriopollenites lateflexus Archangelsky 1973 Triatriopollenites bertelsii Archangelsky 1973 Peninsulapollis "sp. 2" Dettmann and Jarzen 1988 Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988 Peninsulapollis gillii Dettmann and Jarzen 1988
Proteales - Proteaceae	Proteacidites "sp. A", Proteacidites "sp. C", Propylipollis reticuloscabratus, Propylipollis cf. tenuiexinus, cf. Beaupreaidites sp., Triporopollenites minor, Lewalanipollis senectus Proteacidites "sp. A" Cookson and Couper 1953 Proteacidites "sp. C" Cookson and Couper 1953 Propylipollis reticuloscabratus Martin and Harris 1974 Propylipollis cf. tenuiexinus Dettmann and Jarzen 1996 cf. Beaupreaidites sp. Potonié 1960 Triporopollenites minor Barreda 1997 Lewalanipollis senectus Dettmann and Jarzen 1996
Aquifoliales - Aquifoliaceae	Ilexpollenites clifdenensis Ilexpollenites clifdenensis McIntyre 1968
Gentianales - Apocynaceae	cf. Cricotriporites sp. cf. Cricotriporites sp. Leidelmeyer 1966 dogbane
Poales - Typhaceae	Sparganiaceaepollenites sp. Sparganiaceaepollenites sp. Thiergart 1937
Mesangiosperms - Liliaceae	Liliacidites vermireticulatus, Liliacidites variegatus Liliacidites vermireticulatus Archangelsky and Zamaloa 1986 Liliacidites variegatus Couper 1953
Mesangiosperms - Arecaceae	Arecipites minutiscabratus, Spinizonocolpites hialinus, Longapertites aff. vaneendenburgi Arecipites minutiscabratus Mc Intyre 1968 palm Spinizonocolpites hialinus Archangelsky and Zamaloa 1986 palm Longapertites aff. vaneendenburgi Geermerad et al. 1968 palm
Chloranthales - Chloranthaceae	Clavatipollenites sp. Clavatipollenites sp. Couper 1958
Magnoliopsida
-	Tricolporites "sp. 3", Gemmatricolpites "sp. 1", Haloragacidites harrisii, Senipites tercrassata, Psilatricolporites "sp. 1", Rousea patagonica, Rhoipites minusculus, Retitricolporites "sp. 1", Retitricolporites cf. minutiformis Tricolporites "sp. 3" Cookson 1947 Gemmatricolpites "sp. 1" van Hoeken-Klinkenberg 1964 Haloragacidites harrisii Mildenhall and Harris 1971 Senipites tercrassata Archangelsky 1973 Psilatricolporites "sp. 1" Pierce 1961 Rousea patagonica Archangelsky 1973 Rhoipites minusculus Archangelsky 1973 Retitricolporites "sp. 1" Van der Hammen and Wymstra 1964 Retitricolporites cf. minutiformis Truswell and Owen 1988

Coniferales - Podocarpaceae	Trisaccites microsaccatum, Podocarpidites spp., Podocarpidites elegans, Podocarpidites ellipticus, Podocarpidites rugulosus, Phyllocladidites mawsonii, Microcachryidites antarcticus, Gamerroites psilasaccus, Lygistepollenites florinii Trisaccites microsaccatum Couper 1953 podocarp Podocarpidites spp. Cookson 1947 podocarp Podocarpidites elegans Romero 1977 podocarp Podocarpidites ellipticus Cookson 1947 podocarp Podocarpidites rugulosus Romero 1977 podocarp Phyllocladidites mawsonii Cookson 1947 podocarp Microcachryidites antarcticus Couper 1953 podocarp Gamerroites psilasaccus Archangelsky 1988 podocarp Lygistepollenites florinii Stover and Evans 1973 podocarp
Lycopodiopsida
Lycopodiales -	Retitriletes austroclavatidites Retitriletes austroclavatidites Döring et al. 1963 clubmoss
Isoetales - Isoetaceae	Echinosporis sp. Echinosporis sp. Krutzsch 1967 clubmoss
Selaginellales -	Camarozonosporites spp. Camarozonosporites spp. Potonié 1956 clubmoss
Bryopsida
-	Stereisporites "sp. 2", Stereisporites antiquasporites Stereisporites "sp. 2" Pflug 1953 Stereisporites antiquasporites Dettmann 1963
Polypodiopsida
- Dicksoniaceae	Cyatheacidites annulatus, Trilites volkheimerii, Trilites parvallatus, Trilites tuberculiformis Cyatheacidites annulatus Cookson 1947 Trilites volkheimerii Filatoff 1975 Trilites parvallatus Krutzsch 1959 Trilites tuberculiformis Cookson 1947
- Osmundaceae	Rugulatisporites chubutensis Rugulatisporites chubutensis Baldoni 1992
- Polypodiaceae	Laevigatosporites ovatus Laevigatosporites ovatus Wilson and Webster 1946
-	Verrucosisporites "sp. 2" Verrucosisporites "sp. 2" Potonie and Kremp 1954
- Gleicheniaceae	Clavifera triplex, Gleicheniidites circinidites, Gleicheniidites senonicus Clavifera triplex Bolkhovitina 1966 Gleicheniidites circinidites Dettmann 1963 Gleicheniidites senonicus Ross 1949
Schizaeales - Polypodiidae	Convolutispora "sp. 1", Microfoveolatosporites sp., Cicatricosisporites sp. Convolutispora "sp. 1" Hoffmeister et al. 1955 Microfoveolatosporites sp. Nakoman 1966 Cicatricosisporites sp. Potonie and Gelletich 1933
Pteridopsida
-	Deltoidospora sp., Reticuloidosporites tenellis, Matonisporites sp., Cyathidites australis, Cyathidites minor, Cyathidites patagonicus Deltoidospora sp. Miner 1935 Reticuloidosporites tenellis Krutzsch 1959 Matonisporites sp. Couper 1958 Cyathidites australis Couper 1953 Cyathidites minor Couper 1953 Cyathidites patagonicus Archangelsky 1972
Lycopsida
-	Foveotriletes cf. parvirectus Foveotriletes cf. parvirectus Dettmann 1963