Las Flores (Paleocene of Argentina)

Also known as Southern Cliff of Colhué Huapi lake; Yacimiento Las Flores

Where: Chubut, Argentina (45.6° S, 69.1° W: paleocoordinates 48.2° S, 58.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Las Flores Formation (Río Chico Group), Itaboraian (59.0 - 57.0 Ma)

• Originally correlated with Banco Negro Inferior levels (Marshall et al., 1981), the Las Flores Formation (Legarreta & Uliana, 1994) was later referred to the Río Chico Group (Legarreta & Uliana, 1994) and to the Kibenikhoria faunal zone (Bond et al., 1995).

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: F. J. Goin, A. M. Candela, M. A. Abello and E. V. Oliveira. 2009. Earliest South American paucituberculatans and their significance in the understanding of ‘pseudodiprotodont’ marsupial radiations. Zoological Journal of the Linnean Society 155:867-884 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133040: authorized by Philip Mannion, entered by Philip Mannion on 31.08.2012, edited by Jelle Zijlstra and Grace Varnham

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodontidae indet.2 Gill 1872 lungfish
MLP 90-II-5-990, a fragmentary upper tooth plate preserving the greater part of the first ridge and the whole second ridge. The biological wear was normal, and the material does not show any evidence of significant post-mortem abrasion.
Mammalia
 Notoungulata - Isotemnidae
Isotemnus sp.5 Ameghino 1897 notoungulate
 Notoungulata - Oldfieldthomasiidae
Kibenikhoria sp.5 Simpson 1935 notoungulate
Itaboraitherium sp.3 Paula Couto 1970 notoungulate
Colbertia sp.3 Paula Couto 1952 notoungulate
Camargomendesia sp.5 Paulo Couto 1978 notoungulate
 Notoungulata - Notopithecidae
Antepithecus sp.4 Ameghino 1901 notoungulate
 Notoungulata - Henricosborniidae
Peripantostylops sp.5 Ameghino 1904 notoungulate
Henricosbornia sp.3 Ameghino 1901 notoungulate
Orome deepi1 Bauzá et al. 2019 notoungulate
 Ungulata - Didolodontidae
Ernestokokenia sp.3 Ameghino 1901 eutherian
 Ungulata - Macraucheniidae
Victorlemoineia sp. Ameghino 1901 eutherian
MLP 90-II-5-336 (an isolated upper molar M?2; lacking the metastylar area), MLP 90-II-5-335 (an isolated left protocone), MLP 90-II-5-337 (an isolated right protocone) and MLP 90-II-5-300 (an isolated right talonid)
 Ungulata - Proterotheriidae
Anisolambda sp.5 Ameghino 1901 eutherian
 Ungulata - Protolipternidae
Asmithwoodwardia sp.3 Ameghino 1901 eutherian
 Ungulata - Trigonostylopidae
Shecenia sp.5 Simpson 1935 eutherian
Trigonostylops sp.5 Ameghino 1897 eutherian
 Sparassodonta -
? Patene indet.5 Simpson 1935 metatherian
 Polydolopimorphia -
Bobbschaefferia sp.3 Paula Couto 1970 metatherian
 Polydolopimorphia - Bonapartheriidae
Epidolops sp.3 Paula Couto 1952 metatherian
 Polydolopimorphia - Polydolopidae
Polydolopidae "gen. nov. 6"5 Ameghino 1897 metatherian
"Pliodolops sp." = Polydolops5 Ameghino 1897 metatherian
 Theriiformes - Peradectidae
Procaroloameghinia pricei3 Marshall 1982 metatherian
Described and figured by Goin et al. (1998)
 Theriiformes -
Gashternia sp.3 Simpson 1935 marsupial
Marmosopsis sp.3 Paula Couto 1962 marsupial
 Theriiformes - Sternbergiidae
Didelphopsis sp.3 Paula Couto 1952 marsupial
Carolopaulacoutoia sp.3 McKenna and Bell 1997 marsupial
 Theriiformes - Protodidelphidae
Protodidelphis sp.3 Paula Couto 1952 marsupial
Guggenheimia crocheti3 Oliveira and Goin 2011 marsupial
MLP 90-II-5-56
 Theriiformes - Derorhynchidae
Derorhynchidae "gen. nov. 1"5 Paula Couto 1962 marsupial
Derorhynchidae "gen. nov. 2"5 Paula Couto 1962 marsupial
Derorhynchus sp.3 Couto 1952 marsupial
 Marsupialia -
Didelphimorphia "gen. nov. 5"5 Gill 1872 marsupial
 Microbiotheria - Woodburnodontidae
Woodburnodon sp.5 Goin et al. 2007 marsupial
 Microbiotheria - Microbiotheriidae
Mirandatherium sp.3 Paula Couto 1952 marsupial
 Theriiformes -
Monodelphopsis sp.3 Paula Couto 1952 marsupial
 Paucituberculata -
Bardalestes sp. Goin et al. 2009 marsupial
MLP 90-II-5-336, an isolated upper molar (M?2; Fig. 2C, D) lacking the metastylar area; MLP 90-II-5-335, an isolated left protocone; MLP 90-II-5-337, an isolated right protocone; MLP 90-II-5-300 (Fig. 2E, F), an isolated right talonid.