La Flecha ( of Argentina)

Also known as Deseado

Where: Santa Cruz, Argentina (47.9° S, 66.3° W: paleocoordinates 49.0° S, 58.5° W)

• coordinate stated in text

When: Deseado Formation, Deseadan (29.0 - 21.0 Ma)

• "Pyrotherium" beds

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; mudstone

Size class: macrofossils

Primary reference: A. Tournouër. 1903. Note sur la géologie et la paléontologie de la Patagonie. Bulletin de la Société Géologique de France 3:464-473 [J. Alroy/J. Wertheim/J. Wertheim]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 50074: authorized by John Alroy, entered by Jill Wertheim on 05.05.2005, edited by Jelle Zijlstra and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Notoungulata - Toxodontidae
Nesodon sp. Owen 1846 notoungulate
 Notoungulata - Homalodotheriidae
Asmodeus osborni12 Ameghino 1894 notoungulate
CNHM 15061 came from the matrix surrounding a femur of _Asmodeus osborni_
 Notoungulata - Leontiniidae
Leontinia sp., "Leontinia garzoni n. sp." = Ancylocoelus frequens8, Ancylocoelus minor n. sp.8
Leontinia sp. Ameghino 1895 notoungulate
"Leontinia garzoni n. sp." = Ancylocoelus frequens8 Ameghino 1894 notoungulate
MACN A52-599, MACN A52-600bis
Ancylocoelus minor n. sp.8 Ameghino 1901 notoungulate
MACN A52-551, right maxillary fragment with M2-3; left M3
 Notoungulata - Isotemnidae
Trimerostephanos sp. Ameghino 1895 notoungulate
 Notoungulata - Notohippidae
Coresodon sp. notoungulate
 Notoungulata - Archaeohyracidae
Archaeohyrax patagonicus7 Ameghino 1897 notoungulate
 Notoungulata - Homalodontotheridae
Homalodontotherium sp. Huxley 1870 notoungulate
 Notoungulata - Hegetotheriidae
Hegetotherium sp. Ameghino 1887 notoungulate
 Notoungulata - Interatheriidae
Progaleopithecus tournoueri9, "Plagiarthrus cliva n. gen. n. sp." = Argyrohyrax proavus9, "Argyrohyrax proavunculus" = Argyrohyrax proavus9
Progaleopithecus tournoueri9 Ameghino 1904 notoungulate
MACN A52-479c and 481; FMNH 13337
"Plagiarthrus cliva n. gen. n. sp." = Argyrohyrax proavus9 Ameghino 1897 notoungulate
MACN A52-470 - holotype
"Argyrohyrax proavunculus" = Argyrohyrax proavus9 Ameghino 1897 notoungulate
MACN A52
 Notoungulata - Mesotheriidae
"Proedium solitarium n. gen. n. sp." = Trachytherus spegazzinianus1
"Proedium solitarium n. gen. n. sp." = Trachytherus spegazzinianus1 Ameghino 1889 notoungulate
MACN A52-495, symphysis without teeth, type
 Rodentia - Cephalomyidae
Cephalomys plexus12 Ameghino 1897 caviomorph
in MNHN
Cephalomys arcidens12 Ameghino 1897 caviomorph
in MNHN
Litodontomys chubutensis11 Loomis 1914 caviomorph
 Rodentia - Chinchillidae
Scotamys antiquus12 Loomis 1914 chinchilid
Isolated teeth in MNHN: 3 P4, 15 M1 or M2, 3 M3, 3 p4, 9 m1 or m2, 1 m3, 11 incisors
 Rodentia -
Chubutomys simpsoni10 Wood and Patterson 1959 caviomorph
 Rodentia - Erethizontidae
Protosteiromys asmeodeophilus n. sp.12, "Eosteiromys medianus n. sp." = Protosteiromys medianus12, "Protosteiromys medianus" = Protosteiromys medianus11
Protosteiromys asmeodeophilus n. sp.12 porcupine
CNHM 15061, m1 or m2; MNHN 1903-3-18, ?m3
"Eosteiromys medianus n. sp." = Protosteiromys medianus12 Ameghino 1903 porcupine
MACN A52-111, M1 or M2, type; MNHN 1903-3-83, M1 or M2; 1903-3-84, broken M1 or M2; 1903-3-15, M3; 1903-3-16, m1 or m2; 1903-3-17, m1 or m2; 1903-3-85, m1 or m2
"Protosteiromys medianus" = Protosteiromys medianus11 Ameghino 1903 porcupine
 Rodentia -
Deseadomys arambourgi n. gen. n. sp.12
Deseadomys arambourgi n. gen. n. sp.12 Wood and Patterson 1959 caviomorph
MNHN 1903-3-1, dentary p4-m3, type
 Astrapotheria - Astrapotheriidae
Parastrapotherium holmbergi n. gen. n. sp.5 Ameghino 1894 placental
Syntypes: MACN A 52-509, 52-504, 52-515, 52-502, 52-518
Astrapotherium sp. Burmeister 1879 placental
Liarthrus copei n. gen. n. sp.5 Ameghino 1894 placental
MACN A 52-406 - holotype
 Xenarthra - Dasypodidae
Meteutatus aff. lagenaformis2 Ameghino 1897 armadillo
Archaeutatus malaspinensis2 Ameghino 1902 armadillo
 Xenarthra - Mylodontidae
Octodontotherium sp. Ameghino 1894 edentate
 Litopterna - Proterotheriidae
Deuterotherium sp. Ameghino 1895 eutherian
 Sparassodonta -
cf. Sallacyon hoffstetteri6 Villarroel and Marshall 1982 metatherian
MNHN DES 168, partial m3; DES 167, M3
 Sparassodonta - Borhyaenidae
Australohyaena antiqua3 Ameghino 1894 metatherian
FMNH P13633, lower canine crown. The holotype, MACN A 52-532, was said to be from here by Patterson and Marshall (1978), but that is not certain.
 Paucituberculata - Palaeothentidae
Palaeothentidae indet.4 Sinclair 1906 marsupial
MNHN DES 166, dentary partial m3, m1-4