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

Lycopsida
-	Foveotriletes cf. parvirectus Foveotriletes cf. parvirectus Dettmann 1963
Pteridopsida
-	Reticuloidosporites tenellis, Deltoidospora sp., Cyathidites australis, Cyathidites patagonicus, Cyathidites minor, Matonisporites sp. Reticuloidosporites tenellis Krutzsch 1959 Deltoidospora sp. Miner 1935 Cyathidites australis Couper 1953 Cyathidites patagonicus Archangelsky 1972 Cyathidites minor Couper 1953 Matonisporites sp. Couper 1958
Polypodiopsida
- Polypodiaceae	Laevigatosporites ovatus Laevigatosporites ovatus Wilson and Webster 1946
- Osmundaceae	Rugulatisporites chubutensis Rugulatisporites chubutensis Baldoni 1992
- Dicksoniaceae	Trilites volkheimerii, Trilites parvallatus, Trilites tuberculiformis, Cyatheacidites annulatus Trilites volkheimerii Filatoff 1975 Trilites parvallatus Krutzsch 1959 Trilites tuberculiformis Cookson 1947 Cyatheacidites annulatus Cookson 1947
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
- Gleicheniaceae	Clavifera triplex, Gleicheniidites senonicus, Gleicheniidites circinidites Clavifera triplex Bolkhovitina 1966 Gleicheniidites senonicus Ross 1949 Gleicheniidites circinidites Dettmann 1963
-	Verrucosisporites "sp. 2" Verrucosisporites "sp. 2" Potonie and Kremp 1954
Bryopsida
-	Stereisporites "sp. 2", Stereisporites antiquasporites Stereisporites "sp. 2" Pflug 1953 Stereisporites antiquasporites Dettmann 1963
Equisetopsida
Pinidae - Pinidae	Araucariacites australis, Classopollis sp. Araucariacites australis Cookson 1947 Classopollis sp. Pflug 1953
Psilatricolpites
-	Psilatricolpites inargutus Psilatricolpites inargutus Archangelsky 1973
Lycopodiopsida
Isoetales - Isoetaceae	Echinosporis sp. Echinosporis sp. Krutzsch 1967 clubmoss
Selaginellales -	Camarozonosporites spp. Camarozonosporites spp. Potonié 1956 clubmoss
Lycopodiales -	Retitriletes austroclavatidites Retitriletes austroclavatidites Döring et al. 1963 clubmoss
Magnoliopsida
-	Haloragacidites harrisii, Psilatricolporites "sp. 1", Gemmatricolpites "sp. 1", Rousea patagonica, Retitricolporites "sp. 1", Retitricolporites cf. minutiformis, Senipites tercrassata, Rhoipites minusculus, Tricolporites "sp. 3" Haloragacidites harrisii Mildenhall and Harris 1971 Psilatricolporites "sp. 1" Pierce 1961 Gemmatricolpites "sp. 1" van Hoeken-Klinkenberg 1964 Rousea patagonica Archangelsky 1973 Retitricolporites "sp. 1" Van der Hammen and Wymstra 1964 Retitricolporites cf. minutiformis Truswell and Owen 1988 Senipites tercrassata Archangelsky 1973 Rhoipites minusculus Archangelsky 1973 Tricolporites "sp. 3" Cookson 1947

Coniferales - Podocarpaceae	Phyllocladidites mawsonii, Podocarpidites spp., Podocarpidites rugulosus, Podocarpidites elegans, Podocarpidites ellipticus, Gamerroites psilasaccus, Trisaccites microsaccatum, Lygistepollenites florinii, Microcachryidites antarcticus Phyllocladidites mawsonii Cookson 1947 podocarp Podocarpidites spp. Cookson 1947 podocarp Podocarpidites rugulosus Romero 1977 podocarp Podocarpidites elegans Romero 1977 podocarp Podocarpidites ellipticus Cookson 1947 podocarp Gamerroites psilasaccus Archangelsky 1988 podocarp Trisaccites microsaccatum Couper 1953 podocarp Lygistepollenites florinii Stover and Evans 1973 podocarp Microcachryidites antarcticus Couper 1953 podocarp
Dicotyledoneae
Ericales - Ericaceae	Ericipites microtectanum Ericipites microtectanum Archangelsky and Zamaloa 1986 heather
-	Triorites cf. orbiculatus Triorites cf. orbiculatus McIntyre 1965
Angiospermae
Chloranthales - Chloranthaceae	Clavatipollenites sp. Clavatipollenites sp. Couper 1958
Gentianales - Apocynaceae	cf. Cricotriporites sp. cf. Cricotriporites sp. Leidelmeyer 1966 dogbane
Aquifoliales - Aquifoliaceae	Ilexpollenites clifdenensis Ilexpollenites clifdenensis McIntyre 1968
Proteales -	Peninsulapollis "sp. 2", Peninsulapollis cf. truswelliae, Peninsulapollis gillii Peninsulapollis "sp. 2" Dettmann and Jarzen 1988 Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988 Peninsulapollis gillii Dettmann and Jarzen 1988
Proteales - Proteaceae	Lewalanipollis senectus, Triporopollenites minor, Propylipollis cf. tenuiexinus, Propylipollis reticuloscabratus, cf. Beaupreaidites sp., Proteacidites "sp. A", Proteacidites "sp. C" Lewalanipollis senectus Dettmann and Jarzen 1996 Triporopollenites minor Barreda 1997 Propylipollis cf. tenuiexinus Dettmann and Jarzen 1996 Propylipollis reticuloscabratus Martin and Harris 1974 cf. Beaupreaidites sp. Potonié 1960 Proteacidites "sp. A" Cookson and Couper 1953 Proteacidites "sp. C" Cookson and Couper 1953
Proteales -	Triatriopollenites bertelsii, Triatriopollenites lateflexus Triatriopollenites bertelsii Archangelsky 1973 Triatriopollenites lateflexus Archangelsky 1973
Gunnerales -	Tricolpites "sp. 1", Tricolpites "sp. 2", Tricolpites reticulatus Tricolpites "sp. 1" Couper 1953 Tricolpites "sp. 2" Couper 1953 Tricolpites reticulatus Couper 1953
Mesangiosperms - Arecaceae	Arecipites minutiscabratus, Longapertites aff. vaneendenburgi, Spinizonocolpites hialinus Arecipites minutiscabratus Mc Intyre 1968 palm Longapertites aff. vaneendenburgi Geermerad et al. 1968 palm Spinizonocolpites hialinus Archangelsky and Zamaloa 1986 palm
Poales - Typhaceae	Sparganiaceaepollenites sp. Sparganiaceaepollenites sp. Thiergart 1937
Mesangiosperms - Liliaceae	Liliacidites variegatus, Liliacidites vermireticulatus Liliacidites variegatus Couper 1953 Liliacidites vermireticulatus Archangelsky and Zamaloa 1986
Malvales - Bombacaceae	Bombacacidites cf. isoreticulatus Bombacacidites cf. isoreticulatus McIntyre 1968
Fagales -	Nothofagidites saraensis, Nothofagidites fuegiensis, Nothofagidites dorotensis Nothofagidites saraensis Menendez and Caccavari 1975 Nothofagidites fuegiensis Menéndez and Caccavari 1975 Nothofagidites dorotensis Romero 1973