Barranca south of Lago Colhue-Huapi, Gran Barranca (Eocene of Argentina)

Where: Chubut, Argentina (45.7° S, 68.7° W: paleocoordinates 48.1° S, 58.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Barrancan mammal zone, Sarmiento Formation, Middle Eocene (48.6 - 37.2 Ma)

• Lowest fossil horizon, Casamayor Formation - now referred to as Sarmiento Formation

•Initially referred to the Casamayoran SALMA, which was later subdivided. Now considered type sequence for Barrancan SALMA (see Woodburne et al. 2014)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; claystone

• Bentonite and tuffs

Size classes: macrofossils, mesofossils

Collected by C. Ameghino, C. S. Williams, H. Herrera, W. Stein, Scarritt Expedition, G. F. Sternberg, L. G. Marshall, O. Gutierrez; reposited in the AMNH, FMNH

Primary reference: G. G. Simpson. 1935. Descriptions of the oldest known South American mammals, from the Rio Chico Formation. American Museum Novitates 793:1-25 [J. Alroy/J. Wertheim/J. Wertheim]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13779: authorized by John Alroy, entered by Jill Wertheim on 25.04.2002, edited by Richard Butler, Jelle Zijlstra, Terri Cleary and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Loricata -
Crocodylomorpha indet.9 crocodilian
MACN 10871, tooth
 Squamata - Madtsoiidae
? Madtsoia sp.1 Simpson 1933 snake
MACN-A 10879a, MACN-A 10879b, MACN-A 10888, three fragments of trunk vertebrae's centra; MACN-A 10892a, centrum fragment with right prezyg. of a trunk vertebra; MACN-A 10892b, centrum fragment with left prezyg. of a trunk vertebra; MACN-A 10873a and 10873b, fragments of a trunk vertebrae.
 Squamata - Boidae
? Boa sp.1 Linnaeus 1758 boa
MACN-A 10875, partial trunk vertebra
Mammalia
 Notoungulata -
Tonostylops spissus n. gen. n. sp.11
Tonostylops spissus n. gen. n. sp.11 Ameghino 1902 notoungulate
MACN 10483, dentary ?m2-3
 Notoungulata - Archaeopithecidae
"Archaeopithecus rogeri n. gen. n. sp." = Archaeopithecus rogeri2, "Notopithecus fossulatus n. sp." = Archaeopithecus rogeri2, "Adpithecus plenus n. sp." = Archaeopithecus rogeri11
"Archaeopithecus rogeri n. gen. n. sp." = Archaeopithecus rogeri2 Ameghino 1897 notoungulate
MACN 10816, maxilla P1-M2
"Notopithecus fossulatus n. sp." = Archaeopithecus rogeri2 Ameghino 1897 notoungulate
MACN 10824, dentary p3-4 (lectotype); unassociated dentary with p4-m1; P?2
"Adpithecus plenus n. sp." = Archaeopithecus rogeri11 Ameghino 1897 notoungulate
MACN 10851, partial M1 and complete M2
 Notoungulata - Isotemnidae
Thomashuxleya rostrata11, Coelostylodon florentinoameghinoi n. gen. n. sp.13, Coelostylodon caroloameghinoi n. sp.13, "Plexotemnus complicatissimus n. sp." = Acoelohyrax complicatissimus11, "Dimerostephanos colhuehuapensis n. sp." = Isotemnus colhuehuapiensis11, "Isotemnus primitivus" = Isotemnus primitivus12, "Isotemnus conspiquus n. sp." = Isotemnus primitivus2, "Amphitemnus nucleatus n. sp." = Isotemnus primitivus11, "Trimerostephanos angustus n. sp." = Isotemnus primitivus2, "Amphitemnus transitorius n. sp." = Isotemnus primitivus11, Anisotemnus distentus11, "Tychostylops simus n. sp." = Pleurostylodon similis11, "Porotemnus crassiramis n. sp." = Pleurostylodon crassiramis11, "Pleurostylodon modicus" = Pleurostylodon modicus11, "Paratemnus geminatus n. sp." = Pleurostylodon modicus11, "Trimerostephanos biconus n. sp." = Pleurostylodon modicus2, "Pleurostylodon divisus n. sp." = Pleurostylodon modicus11, "Tychostylops marculus n. sp." = Pleurostylodon modicus11, "Dimerostephanos attritus n. sp." = Pleurostylodon modicus11, "Anchistrum sulcosum n. sp." = Pleurostylodon modicus11
Thomashuxleya rostrata11 Ameghino 1901 notoungulate
MACN 10542, M1-3; AMNH 28692, lower jaws; AMNH 28764, dentary p4
Coelostylodon florentinoameghinoi n. gen. n. sp.13 Simpson 1970 notoungulate
MMP 723M, skull
Coelostylodon caroloameghinoi n. sp.13 Simpson 1970 notoungulate
MACN 10753, partial skull with right C, P2-M3; left I1-3, C, P2-M3 (neotype)
"Plexotemnus complicatissimus n. sp." = Acoelohyrax complicatissimus11 Ameghino 1904 notoungulate
MACN A55-1, upper and lower jaw fragments apparently of the same individual (type)
"Dimerostephanos colhuehuapensis n. sp." = Isotemnus colhuehuapiensis11 Ameghino 1902 notoungulate
MACN 10604, dentary p4-m3 (lectotype)
"Isotemnus primitivus" = Isotemnus primitivus12 Ameghino 1897 notoungulate
"Isotemnus conspiquus n. sp." = Isotemnus primitivus2 Ameghino 1897 notoungulate
MACN 10583, maxilla M1-2 (lectotype), left dentary m2-3
"Amphitemnus nucleatus n. sp." = Isotemnus primitivus11 Ameghino 1897 notoungulate
MACN 10619, broken left m3
"Trimerostephanos angustus n. sp." = Isotemnus primitivus2 Ameghino 1897 notoungulate
MACN 10593, dentary p2-m2
"Amphitemnus transitorius n. sp." = Isotemnus primitivus11 Ameghino 1897 notoungulate
MACN 10623, m2-3
Anisotemnus distentus11 Ameghino 1901 notoungulate
AMNH 28696, mandible with right i2-m3 and left p3-m2; AMNH 29389, dentary p3-m3
"Tychostylops simus n. sp." = Pleurostylodon similis11 Ameghino 1901 notoungulate
MACN 10607, right P4 and M2-3, left P4, M1, M3
"Porotemnus crassiramis n. sp." = Pleurostylodon crassiramis11 Ameghino 1902 notoungulate
MACN 10610, dentary with p4 (lectotype), possibly associated m1 and p3, and another lower premolar
"Pleurostylodon modicus" = Pleurostylodon modicus11 Ameghino 1897 notoungulate
Types of synonyms, and: MACN 10554, almost complete lower jaw; AMNH 28878, partial skull; AMNH 28644, left P1-m3 and right M1-3; AMNH 28763, dentary p4-m2; AMNH 28630, dentary p2-m3; AMNH 28689, dentary p3-m3; AMNH 28717, jaws with right P3-m3, right p1-2, left p1-4; AMNH 28709, m1-3; AMNH 28948, dentary p3-m3; AMNH 28880, partial skull; AMNH 28646, partial skull; CNHM P13528, skull; CNHM P13296, partial skull; CNHM P13309, partial skull; CNHM P13620, maxilla with dP2-4, M1-3, P2-4
"Paratemnus geminatus n. sp." = Pleurostylodon modicus11 Ameghino 1897 notoungulate
MACN 10606, maxilla P1-M2
"Trimerostephanos biconus n. sp." = Pleurostylodon modicus2 Ameghino 1897 notoungulate
MACN 10548, dentary m1-2 (lectotype), edentulous dentary, m2, astragalus, calcaneum
"Pleurostylodon divisus n. sp." = Pleurostylodon modicus11 Ameghino 1897 notoungulate
MACN 10567, broken M?2 (lectotype), three premolars
"Tychostylops marculus n. sp." = Pleurostylodon modicus11 Ameghino 1897 notoungulate
MACN 10625, left M3, type
"Dimerostephanos attritus n. sp." = Pleurostylodon modicus11 Ameghino 1897 notoungulate
MACN 10609, dentary with parts of m2-3
"Anchistrum sulcosum n. sp." = Pleurostylodon modicus11 Ameghino 1897 notoungulate
MACN 10767, maxilla dP2-4, M1
 Notoungulata - Notostylopidae
"Notostylops parvus n. sp." = Homalostylops parvus2, "Acrostylops pungiunculus n. sp." = Homalostylops parvus10, "Entelostylops incolumis n. sp." = Homalostylops parvus10, "Homalostylops rigeo n. sp." = Homalostylops parvus10, Notostylops bicinctus n. sp.2, Isostylops fretus n. sp.10, "Notostylops murinus n. gen. n. sp." = Notostylops murinus2, "Notostylops promurinus n. sp." = Notostylops murinus10, "Entelostylops completus n. sp." = Notostylops murinus10, "Notostylops chicoensis n. sp." = Notostylops murinus10, Catastylops deflexus n. sp.10
"Notostylops parvus n. sp." = Homalostylops parvus2 Ameghino 1897 notoungulate
MACN 10527, right p2-m3, left p3-m2; MACN 10534, left p3-m3; probably all one individual
"Acrostylops pungiunculus n. sp." = Homalostylops parvus10 Ameghino 1897 notoungulate
MACN 10468, mandible with right i3 and p1-m2, left i2 and p3-4
"Entelostylops incolumis n. sp." = Homalostylops parvus10 Ameghino 1897 notoungulate
MACN 10495, four uppre molars
"Homalostylops rigeo n. sp." = Homalostylops parvus10 Ameghino 1897 notoungulate
MACN 10473, partial lower jaw with left p3-m3, right p3-4
Notostylops bicinctus n. sp.2 Ameghino 1897 notoungulate
MACN 10512, left upper premolar
Isostylops fretus n. sp.10 Ameghino 1902 notoungulate
MACN 10494, four isolated premolars
"Notostylops murinus n. gen. n. sp." = Notostylops murinus2 Ameghino 1897 notoungulate
MACN 10500, partial skull (paralectotype); MACN 10498, both sides of lower jaw (lectotype). Numerous referred specimens.
"Notostylops promurinus n. sp." = Notostylops murinus10 Ameghino 1897 notoungulate
MACN 10507, maxilla with P3-M3, molars broken
"Entelostylops completus n. sp." = Notostylops murinus10 Ameghino 1897 notoungulate
MACN 10492, maxilla P4-m3
"Notostylops chicoensis n. sp." = Notostylops murinus10 Ameghino 1897 notoungulate
MACN 10518, right m1-2
Catastylops deflexus n. sp.10 Ameghino 1904 notoungulate
MACN 10493, maxilla with P2-4
 Notoungulata - Archaeohyracidae
Eohyrax praerusticus n. sp.11 Ameghino 1902 notoungulate
MACN 10780, m?1. Other syntypes are not of this species.
Eohyrax isotemnoides n. sp.11 Ameghino 1904 notoungulate
MACN 10776, dentary p4-m3 (type), upper molar, m3. MACN 10778, M1 or M2, m3, dentary with m3 and partial m2. AMNH 28665, dentary p1-m3. AMNH 28628, right dentary p1-m3, left p4-m2. AMNH 28844, M1-2.
 Notoungulata - Oldfieldthomasiidae
"Eostylops obliquatus n. sp." = Maxschlosseria consumata11, "Oldfieldthomasia parvidens n. sp." = Oldfieldthomasia parvidens11, "Oldfieldthomasia pulchella n. sp." = Oldfieldthomasia parvidens11, "Oldfieldthomasia debilitata" = Oldfieldthomasia debilitata11, "Oldfieldthomasia conifera n. sp." = Oldfieldthomasia debilitata3, "Oldfieldthomasia cingulata n. sp." = Oldfieldthomasia debilitata11, "Oldfieldthomasia furcata n. sp." = Oldfieldthomasia debilitata11, "Oldfieldthomasia plicata n. sp." = Oldfieldthomasia debilitata11, "Oldfieldthomasia cuneata n. sp." = Oldfieldthomasia debilitata11, Oldfieldthomasia transversa n. sp.11, Ultrapithecus rutilans n. gen. n. sp.11, Paginula parca5
"Eostylops obliquatus n. sp." = Maxschlosseria consumata11 Ameghino 1901 notoungulate
MACN 10482, maxilla M2
"Oldfieldthomasia parvidens n. sp." = Oldfieldthomasia parvidens11 Ameghino 1901 notoungulate
MACN 10763, right P4-M2 (type) and three isolated upper cheek teeth; MHN Tournouër 21, partial skull
"Oldfieldthomasia pulchella n. sp." = Oldfieldthomasia parvidens11 Ameghino 1901 notoungulate
MACN 10756, maxilla fragment with dP3-4 and M1
"Oldfieldthomasia debilitata" = Oldfieldthomasia debilitata11 Ameghino 1901 notoungulate
Types of synonyms; and: MACN 10765, partial skull; MACN 10761, P4-M3; MACN 10749, four dentary fragments; MACN 10750, three dentary fragments; AMNH 28680, associated dentitions; AMNH 28780, maxila I2-P3 and endocranial cast; AMNH 28632, partial skull; AMNH 28691, partial skull; AMNH 28896, partial skull; AMNH 28730, mandible left p1-m2, right i1-c1; AMNH 28963, mandible left p3-m3, right p2-m2
"Oldfieldthomasia conifera n. sp." = Oldfieldthomasia debilitata3 Ameghino 1901 notoungulate
MACN 10757, maxilla P4-M3
"Oldfieldthomasia cingulata n. sp." = Oldfieldthomasia debilitata11 Ameghino 1901 notoungulate
MACN 10772, skull
"Oldfieldthomasia furcata n. sp." = Oldfieldthomasia debilitata11 Ameghino 1901 notoungulate
MACN 10748, left maxilla with P1-M3
"Oldfieldthomasia plicata n. sp." = Oldfieldthomasia debilitata11 Ameghino 1901 notoungulate
MACN 10764, right dM4 (type or lectotype), left M2-3, broken M1
"Oldfieldthomasia cuneata n. sp." = Oldfieldthomasia debilitata11 Ameghino 1901 notoungulate
MACN 10762, maxilla P1-M3
Oldfieldthomasia transversa n. sp.11 Ameghino 1901 notoungulate
MACN 10754, isolated upper teeth, probably dP4 and M1 (type)
Ultrapithecus rutilans n. gen. n. sp.11 Ameghino 1901 notoungulate
MACN 10818, maxilla P1-M2 (type); AMNH 28706, palate P1-M3; AMNH 28583, palate with left dI2-dP4 and M1, right dP1-4, M1, part of M2; MHN Tournouër No. 23, maxilla P2-M3
Paginula parca5 Ameghino 1901 notoungulate
 Notoungulata - Notopithecidae
Transpithecus obtentus n. sp.14, Antepithecus innexus n. sp.11, "Antepithecus brachystephanus n. sp." = Antepithecus brachystephanus11, "Infrapithecus cinctus n. sp." = Antepithecus brachystephanus11, "Antepithecus interrasus n. sp." = Antepithecus brachystephanus11, "Notopithecus adapinus n. gen. n. sp." = Notopithecus adapinus2, "Adpithecus secans" = Notopithecus adapinus11, "Adpithecus subtenuis n. sp." = Notopithecus adapinus11
Transpithecus obtentus n. sp.14 Ameghino 1901 notoungulate
MACN-A 10833a, maxilla M1-3 (lectotype). AMNH 28791, P2-P4; AMNH 28861, dentary p2-m3; AMNH 28953, maxilla P3-M3; FMNH P14895, dentary m3; MACN-A 10824, P2; MACN-A 10833b, M2; MACN-A 10833c, M3; MACN-A 10845, P4; MPEF-PV 1284, dentary p3-m1 (from "Puesto Almendra")
Antepithecus innexus n. sp.11 Ameghino 1904 notoungulate
MACN 10839, isolated upper molar
"Antepithecus brachystephanus n. sp." = Antepithecus brachystephanus11 Ameghino 1901 notoungulate
MACN 10841, seven isolated upper teeth (including lectotype M2), fragmentary maxilla, two fragmentary dentaries
"Infrapithecus cinctus n. sp." = Antepithecus brachystephanus11 Ameghino 1901 notoungulate
MACN 10826, dentary p2-m3
"Antepithecus interrasus n. sp." = Antepithecus brachystephanus11 Ameghino 1901 notoungulate
MACN 10859, maxillary P2-M2
"Notopithecus adapinus n. gen. n. sp." = Notopithecus adapinus2 Ameghino 1897 notoungulate
Syntypes: MACN 10822, associated jaw, limb bone, and vertebra fragments; and MACN 10843, jaw fragments and isolated teeth.
"Adpithecus secans" = Notopithecus adapinus11 Ameghino 1897 notoungulate
Referred specimens in Ameghino Collection.
"Adpithecus subtenuis n. sp." = Notopithecus adapinus11 Ameghino 1897 notoungulate
MACN 10834, maxilla P3-M3 (lectotype), maxilla P4-M2
 Notoungulata - Henricosborniidae
Henricosbornia ? lophodonta5 Ameghino 1901 notoungulate
 Notoungulata -
"Acoelodus" proclivus n. sp.11 Ameghino 1902 notoungulate
MACN 10752, isolated M1 (type), jaw fragment with p3-4
 Cingulata - Dasypodidae
Parutaetus chicoensis n. sp.10, Parutaetus signatus n. sp.10, Parutaetus clusus n. sp.10, Meteutatus percarinatus n. sp.10, "Pseudostegotherium" chubutanum n. sp.4, Prostegotherium astrifer n. sp.10, Prostegotherium notostylopianum n. sp.10, Utaetus deustus n. sp.10, "Anteutatus lenis" = Utaetus lenis10, "Utaetus buccatus n. sp." = Utaetus buccatus10, "Posteutatus indemnis n. sp." = Utaetus buccatus10, "Posteutatus scabridus n. sp." = Utaetus buccatus10, "Posteutatus indentatus n. sp." = Utaetus buccatus10, "Orthutaetus clavatus n. sp." = Utaetus buccatus10, "Orthutaetus crenulatus n. sp." = Utaetus buccatus10, "? Machlydotherium sparsus n. sp." = Machlydotherium sparsum10
Parutaetus chicoensis n. sp.10 Ameghino 1902 armadillo
MACN 10429, six scutes
Parutaetus signatus n. sp.10 Ameghino 1902 armadillo
MACN 10422, six scutes
Parutaetus clusus n. sp.10 Ameghino 1902 armadillo
MACN 10436, two scutes
Meteutatus percarinatus n. sp.10 Ameghino 1902 armadillo
MACN 10453, buckler scute
"Pseudostegotherium" chubutanum n. sp.4 Ameghino 1902 armadillo
MACN A-10438 (carapace osteoderms, syntype); MPEF PV 5425, 6344, 6398, 6465, 6516, 7234A, 7660B; AMNH 28745, 28851
Prostegotherium astrifer n. sp.10 Ameghino 1902 armadillo
MACN 10444, 18 scutes
Prostegotherium notostylopianum n. sp.10 Ameghino 1902 armadillo
MACN 10451, 33 scutes
Utaetus deustus n. sp.10 Ameghino 1902 armadillo
MACN 10431, four scutes
"Anteutatus lenis" = Utaetus lenis10 Ameghino 1902 armadillo
MACN 10459, five scutes. Holotype may also be from here.
"Utaetus buccatus n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
AMNH 28668, neotype, 200-300 scutes; part of cephalic shield, two areas of associated buckler scutes, two areas of movable bands, connected parietals with parts of squamosals and temporals, fragments of occipitals, crushed maxilla with four teeth, both sides of lower jaw with most of the teeth, nine isolated teeth; parts of nine vertebrae; one chevron bone, several rib fragments; parts of both scapulae, one humerus and ulna, and both radii; one ilium and fragment of the other, parts of one ischium and pubis, parts of one femur and fibula, and various tarsals, metatarsals, and phalanges. Original holotype was MACN 10457, 18 scutes, metacarpal, and calcaneum, locality uncertain.
"Posteutatus indemnis n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
MACN 10442, eight scutes
"Posteutatus scabridus n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
MACN 10463, three scutes
"Posteutatus indentatus n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
MACN 10464, three scutes
"Orthutaetus clavatus n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
MACN 10440, scute
"Orthutaetus crenulatus n. sp." = Utaetus buccatus10 Ameghino 1902 armadillo
MACN 10430, scute
"? Machlydotherium sparsus n. sp." = Machlydotherium sparsum10 Ameghino 1902 armadillo
MACN 10427, two broken buckler scutes. Simpson (1948) suspects these specimens were really from the Mustersan. They were said to be from the upper part of the "Notostylopéen" (?= El Nuevo level).
 Ungulata - Didolodontidae
Proectocion precisus n. sp.10, Proectocion argentinus n. sp.10, Didolodus minor6, "Didolodus multicuspis" = Didolodus multicuspis10, "Lonchoconus lanceolatus n. gen. n. sp." = Didolodus multicuspis10, "Didolodus colligatus n. sp." = Didolodus multicuspis10, "Lambdaconus mamma n. sp." = Paulogervaisia mamma10, Paulogervaisia inusta n. sp.6, "Lambdaconus porcus n. sp." = Paulogervaisia porca10, Ernestokokenia nitida10
Proectocion precisus n. sp.10 Ameghino 1904 eutherian
MACN 10679, maxilla with P4-M3
Proectocion argentinus n. sp.10 Ameghino 1904 eutherian
MACN 10673, M3
Didolodus minor6 Simpson 1948 eutherian
"Didolodus multicuspis" = Didolodus multicuspis10 Ameghino 1897 eutherian
MACN 10720, mandible with m3 and possibly associated isolated M1 and C; MACN 10738, right P1 and left P2; MACN 10729, left M2; AMNH 28475, mandible p4, m2-3; AMNH 2878, M3; AMNH 28774, p4. Additional specimens are types of synonyms.
"Lonchoconus lanceolatus n. gen. n. sp." = Didolodus multicuspis10 Ameghino 1897 eutherian
MACN 10730, left M1
"Didolodus colligatus n. sp." = Didolodus multicuspis10 Ameghino 1897 eutherian
MACN 10736, right and left m2, left p3-4
"Lambdaconus mamma n. sp." = Paulogervaisia mamma10 Ameghino 1901 eutherian
MACN 10719: fragmentary mandible p3-m2; maxilla with broken M2-3; broken M2; other fragments. Simpson (1948:107) selected the maxilla as the lectotype and doubted the referral of the other fragments.
Paulogervaisia inusta n. sp.6 Ameghino 1901 eutherian
MACN 10664, right m3, type of Paulogervaisia inusta; MACN 10719, right jaw fragment with p3-m2 and maxillary fragment with M2-3 and isolated right M2, type of Lambdaconus mamma; MPEF 7621, isolated right m2.
"Lambdaconus porcus n. sp." = Paulogervaisia porca10 Ameghino 1901 eutherian
MACN 10721, maxilla fragment with broken M2 and complete M3
Ernestokokenia nitida10 Ameghino 1901 eutherian
AMNH 28477, left m3
 Ungulata - Macraucheniidae
Rutimeyeria conulifera n. gen. n. sp.10
Rutimeyeria conulifera n. gen. n. sp.10 Ameghino 1901 eutherian
MACN 12013, upper molar
 Ungulata - Proterotheriidae
Ricardolydekkeria profunda n. sp.10 Ameghino 1901 eutherian
MACN 10706, partial right upper cheek tooth (lectotype); two fragments of upper teeth and two of lower molars.
Ricardolydekkeria praerupta n. sp.10 Ameghino 1901 eutherian
MACN 10701, right upper cheek tooth
Guilielmofloweria plicata n. gen. n. sp.10 Ameghino 1901 eutherian
MACN 10703, left upper cheek tooth (type)
Josepholeidya deculca n. sp.10 Ameghino 1901 eutherian
MACN 10682, upper molar
Anisolambda fissidens5 Ameghino 1901 eutherian
 Ungulata - Trigonostylopidae
"Albertogaudrya unica" = Albertogaudrya unica11, "Albertogaudrya tersa n. sp." = Albertogaudrya unica11, "Scabellia laticincta n. sp." = Albertogaudrya unica11, "Albertogaudrya separata n. sp." = Albertogaudrya unica11, "Scabellia cyclogona n. sp." = Albertogaudrya unica11, "Albertogaudrya oxygona n. sp." = Albertogaudrya unica11, ? Trigonostylops duplex n. sp.11, "Trigonostylops wortmani n. gen. n. sp." = Trigonostylops wortmani2, "Trigonostylops eximius n. sp." = Trigonostylops wortmani11, "Trigonostylops scabellum" = Trigonostylops wortmani11, "Trigonostylops germinalis n. sp." = Trigonostylops wortmani11, "Trigonostylops hemicyclus n. sp." = Trigonostylops wortmani11, "Trigonostylops columnifer n. sp." = Trigonostylops wortmani11, "Trigonostylops minimus n. sp." = Trigonostylops wortmani11, "Trigonostylops secundarius n. sp." = Trigonostylops wortmani11, "Trigonostylops coryphodontoides n. sp." = Trigonostylops wortmani11, "Trigonostylops trigonus n. sp." = Trigonostylops wortmani11, "Trigonostylops insumptus n. sp." = Trigonostylops wortmani11
"Albertogaudrya unica" = Albertogaudrya unica11 Ameghino 1901 eutherian
AMNH 28639, P4-M1
"Albertogaudrya tersa n. sp." = Albertogaudrya unica11 Ameghino 1901 eutherian
MACN 16033, upper canine; MACN 12012, incisor. Type apparently an upper molar, not relocated by Simpson (1967).
"Scabellia laticincta n. sp." = Albertogaudrya unica11 Ameghino 1901 eutherian
MACN 12008, partial upper cheek tooth
"Albertogaudrya separata n. sp." = Albertogaudrya unica11 Ameghino 1901 eutherian
MACN 12004, upper molar
"Scabellia cyclogona n. sp." = Albertogaudrya unica11 Ameghino 1901 eutherian
MACN 12005, upper cheek tooth fragments
"Albertogaudrya oxygona n. sp." = Albertogaudrya unica11 Ameghino 1901 eutherian
MACN 12007, partial upper molar
? Trigonostylops duplex n. sp.11 Ameghino 1901 eutherian
MACN 12010, broken symphysis
"Trigonostylops wortmani n. gen. n. sp." = Trigonostylops wortmani2 Ameghino 1897 eutherian
MACN 10651, M?2, lectotype, P?4, m3 talonid (type series). Other specimens including AMNH 28700, skull
"Trigonostylops eximius n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10650, upper molar (lectotype), two m3s, m3 talonid, m?2, m?1, C1
"Trigonostylops scabellum" = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACn 10629, p2-4
"Trigonostylops germinalis n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10639, upper molar
"Trigonostylops hemicyclus n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10659, m2, lectotype, and another m2
"Trigonostylops columnifer n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10638, two upper molars including the lectotype
"Trigonostylops minimus n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10660, M?3
"Trigonostylops secundarius n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10645, upper molar (lectotype), upper molar, upper premolar
"Trigonostylops coryphodontoides n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10641, upper molar
"Trigonostylops trigonus n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10656, broken upper molar
"Trigonostylops insumptus n. sp." = Trigonostylops wortmani11 Ameghino 1897 eutherian
MACN 10654, M?2
 Sparassodonta -
Pseudocladosictis determinabile n. sp.10 Ameghino 1902 metatherian
MACN 10325, premolar, holotype
Patene coluapiensis n. gen. n. sp. Simpson 1935 metatherian
 Sparassodonta - Borhyaenidae
Angelocabrerus daptes n. gen. n. sp.13
Angelocabrerus daptes n. gen. n. sp.13 Simpson 1970 metatherian
MMP 967M, dentary m2-4 and isolated teeth. "Surface find high in the beds", perhaps post-Casamayoran.
 Sparassodonta - Proborhyaenidae
"Arminiheringia ? auceta" = Arminiheringia auceta5, "Dilestes dilobus n. gen. n. sp." = Arminiheringia auceta10, "Arminiheringia cultrata n. sp." = Arminiheringia auceta10, "Arminiheringia contigua n. sp." = Arminiheringia auceta10
"Arminiheringia ? auceta" = Arminiheringia auceta5 Ameghino 1902 metatherian
"Dilestes dilobus n. gen. n. sp." = Arminiheringia auceta10 Ameghino 1902 metatherian
MACN 10324, a complete lower molar, a broken one, and a fragment (syntypes)
"Arminiheringia cultrata n. sp." = Arminiheringia auceta10 Ameghino 1902 metatherian
MACN 10329, isolated M3
"Arminiheringia contigua n. sp." = Arminiheringia auceta10 Ameghino 1902 metatherian
MACN 10317, symphysis with right c-m1
 Polydolopimorphia - Rosendolopidae
Rosendolops primigenium n. gen. n. sp.7
Rosendolops primigenium n. gen. n. sp.7 Goin and Candela 1996 metatherian
MLP 77-VI-14-3, ?M2, holotype
 Polydolopimorphia - Polydolopidae
"Polydolops thomasi n. gen. n. sp." = Polydolops thomasi2, "Polydolops simplex n. sp." = Polydolops thomasi8, "Polydolops fur n. sp." = Polydolops thomasi8, "Polydolops serra" = Polydolops serra10, "Pliodolops primulus n. gen. n. sp." = Polydolops serra8, "Anissodolops serrifer n. gen. n. sp." = Polydolops serra8, Polydolops crassus n. sp.8, Amphidolops serrula n. gen. n. sp.8, "Eudolops tetragonus n. gen. n. sp." = Eudolops tetragonus2, "Propolymastodon cardatus n. sp." = Eudolops tetragonus8, "Promysops acuminatus n. gen. n. sp." = Eudolops tetragonus8, "Propolymastodon caroliameghinoi n. gen. n. sp." = Eudolops tetragonus8, Pseudolops princeps n. gen. n. sp.8
"Polydolops thomasi n. gen. n. sp." = Polydolops thomasi2 Ameghino 1897 metatherian
MACN 10338 (lectotype). AC 3171, AMNH 28434, 28440, 28449, FMNH P14717, MACN 10332 (c, e-g), 18469, 18472, MLP 77-VI-13-9, 77-VI-14-7, 77-VI-14-8, MNHN No. 3. From Simpson (1948:59): AMNH 28434 is the holotype of _Polydolops thomasi paahi_. Referred specimens of _P. t. paahi_: CNHM P14717, AMNH 28443, AMNH 28934
"Polydolops simplex n. sp." = Polydolops thomasi8 Ameghino 1897 metatherian
MACN 10335
"Polydolops fur n. sp." = Polydolops thomasi8 Ameghino 1897 metatherian
MACN 10342
"Polydolops serra" = Polydolops serra10 Ameghino 1902 metatherian
MACN 10361, mandible m2-3; MACN 10363, mandible m4 and partial m3
"Pliodolops primulus n. gen. n. sp." = Polydolops serra8 Ameghino 1902 metatherian
MACN 10353
"Anissodolops serrifer n. gen. n. sp." = Polydolops serra8 Ameghino 1902 metatherian
MACN 10359
Polydolops crassus n. sp.8 Ameghino 1902 metatherian
MACN 10349
Amphidolops serrula n. gen. n. sp.8 Ameghino 1902 metatherian
MACN 10357, an isolated left M2 (holotype). AMNH 28438
"Eudolops tetragonus n. gen. n. sp." = Eudolops tetragonus2 Ameghino 1897 metatherian
MACN 10358, an isolated right M1 missing posterolabial corner (holotype). AMNH 28437, MACN 10340b, MLP 77-VI-14-5
"Propolymastodon cardatus n. sp." = Eudolops tetragonus8 Ameghino 1897 metatherian
MACN 10333, part of a left mandibular ramus with M1-2
"Promysops acuminatus n. gen. n. sp." = Eudolops tetragonus8 Ameghino 1897 metatherian
MACN 10340a, anterior part of an edentulous right mandibular ramus with alveoli of two small incisors and C, part of diastema and alveoli of P8, and anterior alveolus of M1
"Propolymastodon caroliameghinoi n. gen. n. sp." = Eudolops tetragonus8 Ameghino 1897 metatherian
MACN 10334, greater part of a left mandibular ramus with P3-M3 complete and an isolated right C
Pseudolops princeps n. gen. n. sp.8 Ameghino 1902 metatherian
MACN 10332a, an isolated left P3 (holotype). MACN 10332b-g
 Theriiformes - Peradectidae
Caroloameghinia mater10 Ameghino 1901 metatherian
MACN 10348, mandible with p2-3 m1-4, neotype of Simpson (1948), withdrawn by Simpson (1967) after the original holotype was relocated. AMNH 28441a and b, isolated upper molars.
 Theriiformes - Derorhynchidae
Coona gaudryi n. sp.11
Coona gaudryi n. sp.11 Simpson 1964 marsupial
MNHN, Tournouër Collection No. 1, two lower jaw fragments, one with right m1-3 one with left p4 and m2
 Paucituberculata - Caenolestidae
Progarzonia notostylopense n. gen. n. sp.10
Progarzonia notostylopense n. gen. n. sp.10 Ameghino 1904 marsupial
MACN A55-14, left dentary fragment with premolar. Simpson (1948) could not relocate it in the Ameghino Collection, but Simpson (1967) recorded that it was found again.
 Theriiformes -
Ideodelphys microscopicus n. gen. n. sp.10
Ideodelphys microscopicus n. gen. n. sp.10 Ameghino 1902 marsupial
MACN 10344
  -
Proplanodus adnepos n. gen. n. sp.11
Proplanodus adnepos n. gen. n. sp.11 Ameghino 1902 mammal
MACN 12015, four ?incisors