PBDB Collection

M3 - San Ramon section (Cretaceous of Argentina)

Where: Chubut, Argentina (42.7° S, 69.8° W: paleocoordinates 44.8° S, 58.3° W)

• coordinate estimated from map

When: Lefipán Formation, Maastrichtian (72.1 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified mudstone

• The uppermost Maastrichtian is represented by tidal channel and tidal flat deposits with a low diversity Corbicula assemblage indicative of low salinity, high-stress environments unfavorable to most marine species that characterize the stable, normal marine, Maastrichtian infaunal guilds in most of the succession.

• 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 151452: 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
Angiospermae
Malvales - Bombacaceae	Bombacacidites "sp. 1" Bombacacidites "sp. 1" Couper 1960
Gunnerales -	Tricolpites reticulatus Tricolpites reticulatus Couper 1953
Proteales - Proteaceae	Lewalanipollis senectus, Beaupreaidites sp., Propylipollis sp., Propylipollis ambiguus, Triporopollenites minor, Proteacidites "sp. A", Proteacidites angulatus Lewalanipollis senectus Dettmann and Jarzen 1996 Beaupreaidites sp. Potonié 1960 cf. Beaupreaidites sp. Propylipollis sp. Martin and Harris 1975 Propylipollis ambiguus Dettmann and Jarzen 1996 Triporopollenites minor Barreda 1997 Proteacidites "sp. A" Cookson and Couper 1953 Proteacidites angulatus Stover 1973
Proteales -	Triatriopollenites "sp. 1", Triatriopollenites lateflexus, Peninsulapollis cf. truswelliae, Peninsulapollis askiniae, Peninsulapollis gillii Triatriopollenites "sp. 1" Thomson and Pflug 1953 Triatriopollenites lateflexus Archangelsky 1973 Peninsulapollis cf. truswelliae Dettmann and Jarzen 1988 Peninsulapollis askiniae Dettmann and Jarzen 1988 Peninsulapollis gillii Dettmann and Jarzen 1988
Asterales - Asteraceae	Tubulifloridites lilliei Tubulifloridites lilliei Farabee and Canright 1986 daisy
Mesangiosperms - Liliaceae	Liliacidites regularis, Liliacidites cf. crassibaculatus, Liliacidites variegatus Liliacidites regularis Archangelsky 1973 Liliacidites cf. crassibaculatus Freile 1972 Liliacidites variegatus Couper 1953
Mesangiosperms - Arecaceae	Longapertites aff. vaneendenburgi, Arecipites minutiscabratus, Spinizonocolpites hialinus Longapertites aff. vaneendenburgi Geermerad et al. 1968 palm Arecipites minutiscabratus Mc Intyre 1968 palm Spinizonocolpites hialinus Archangelsky and Zamaloa 1986 palm
Poales - Typhaceae	Sparganiaceaepollenites sp. Sparganiaceaepollenites sp. Thiergart 1937
Piperales - Aristolochiaceae	Rosannia manika Rosannia manika Srivastava and Braman 2010 magnoliids
Dicotyledoneae
Ericales - Ericaceae	Ericipites microtectanum Ericipites microtectanum Archangelsky and Zamaloa 1986 heather

Coniferales - Podocarpaceae	Podocarpidites spp., Podocarpidites ellipticus, Podocarpidites elegans, Trisaccites microsaccatum, Gamerroites psilasaccus, Phyllocladidites mawsonii, Microcachryidites antarcticus, Lygistepollenites florinii Podocarpidites spp. Cookson 1947 podocarp Podocarpidites ellipticus Cookson 1947 podocarp Podocarpidites elegans Romero 1977 podocarp Trisaccites microsaccatum Couper 1953 podocarp Gamerroites psilasaccus Archangelsky 1988 podocarp Phyllocladidites mawsonii Cookson 1947 podocarp Microcachryidites antarcticus Couper 1953 podocarp Lygistepollenites florinii Stover and Evans 1973 podocarp
Magnoliopsida
-	Senipites tercrassata, Quadraplanus brossus, Forcipites longus, Psilatricolporites "sp. 1", Psilatricolporites "sp. 2", Haloragacidites harrisii, Retitricolporites "sp. 1", Retitricolporites chubutensis Senipites tercrassata Archangelsky 1973 Quadraplanus brossus Stover and Partridge 1973 Forcipites longus Dettmann and Jarzen 1988 cf. Forcipites? longus Psilatricolporites "sp. 1" Pierce 1961 Psilatricolporites "sp. 2" Pierce 1961 Haloragacidites harrisii Mildenhall and Harris 1971 Retitricolporites "sp. 1" Van der Hammen and Wymstra 1964 Retitricolporites chubutensis Archangelsky 1973
Lycopodiopsida
Selaginellales -	Ceratosporites equalis, Camarozonosporites spp., Camarozonosporites ohaiensis, Densoisporites velatus Ceratosporites equalis Cookson and Dettmann 1958 clubmoss Camarozonosporites spp. Potonié 1956 clubmoss Camarozonosporites ohaiensis Dettmann and Playford 1968 clubmoss Densoisporites velatus Dettmann 1963 clubmoss
Lycopodiales - Lycopodiaceae	Sestrosporites pseudoalveolatus Sestrosporites pseudoalveolatus Dettmann 1963 clubmoss
Lycopodiales -	Retitriletes austroclavatidites Retitriletes austroclavatidites Döring et al. 1963 clubmoss
Isoetales - Isoetaceae	Echinosporis sp. Echinosporis sp. Krutzsch 1967 clubmoss
Bryopsida
-	Stereisporites sp., Stereisporites antiquasporites Stereisporites sp. Pflug 1953 Stereisporites (Tripunctisporis) sp. Stereisporites antiquasporites Dettmann 1963
Microfoveolatosporis
-	Microfoveolatosporis sp. Microfoveolatosporis sp. Krutzsch 1959
Lycopsida
-	Foveotriletes cf. parvirectus Foveotriletes cf. parvirectus Dettmann 1963
Pteridopsida
-	Leiotriletes sp., Grapnelispora evansii, Cyathidites minor, Cyathidites patagonicus, Cyathidites australis, Deltoidospora sp. Leiotriletes sp. Potonie and Kremp 1954 Grapnelispora evansii Stover and Partridge 1984 Cyathidites minor Couper 1953 Cyathidites patagonicus Archangelsky 1972 Cyathidites australis Couper 1953 Deltoidospora sp. Miner 1935
Polypodiopsida
-	Biretisporites sp. Biretisporites sp. Delcourt et al. 1963
- Polypodiaceae	Laevigatosporites ovatus Laevigatosporites ovatus Wilson and Webster 1946
- Blechnaceae	Peromonolites "sp. 2", Peromonolites "sp. 1", Peromonolites vellosus Peromonolites "sp. 2" Couper 1953 Peromonolites "sp. 1" Couper 1953 Peromonolites vellosus Partridge 1973
- Osmundaceae	Rugulatisporites chubutensis, Baculatisporites comaumensis Rugulatisporites chubutensis Baldoni 1992 Baculatisporites comaumensis Potonie 1953
- Dicksoniaceae	Trilites "sp. 1", Trilites volkheimerii, Cyatheacidites annulatus Trilites "sp. 1" Erdtman and Couper 1947 Trilites volkheimerii Filatoff 1975 Cyatheacidites annulatus Cookson 1947
- Gleicheniaceae	Gleicheniidites sp., Gleicheniidites senonicus, Clavifera triplex Gleicheniidites sp. Dettmann 1963 Gleicheniidites senonicus Ross 1949 Clavifera triplex Bolkhovitina 1966
-	Verrucosisporites "sp. 1" Verrucosisporites "sp. 1" Potonie and Kremp 1954
Schizaeales - Polypodiidae	Convolutispora "sp. 1" Convolutispora "sp. 1" Hoffmeister et al. 1955
Salviniales - Polypodiidae	Azollopsis tormentosa Azollopsis tormentosa Hall 1968
Cycadopites
-	Cycadopites sp. Cycadopites sp. Wodehouse 1933
Ginkgoopsida
Caytoniales -	Vitreisporites pallidus Vitreisporites pallidus Nilsson 1958