The Sarmiento Formation (Spanish: Formación Sarmiento), in older literature described as the Casamayor Formation, is a geological formation in Chubut Province, Argentina, in central Patagonia, which spans around 30 million years from the mid-Eocene to the early Miocene. It predominantly consists of pyroclastic deposits, which were deposited in a semi-arid environment. It is divided up into a number of members. The diverse fauna of the Sarmiento Formation, including a variety of birds, crocodilians, turtles and snakes, also includes many mammals such as South American native ungulates (notoungulates, litopterns, astrapotheres) as well as armadillos, and caviomorph rodents. Some trace fossils have also been found, such as Teisseirei.
Paleofauna
Amphibians
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Anura indet. | Currently undescribed | Upper Puesto Almendra Member | |||
| Calyptocephalella | C. canqueli | Upper Puesto Almendra Member | A calyptocephalellid frog | ||
| Eupsophus | E. sp. | Upper Puesto Almendra Member | An alsodid frog | ||
| Neoprocoela | N. edentatus | Upper Puesto Almendra Member | A leptodactylid frog |
Birds
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Andrewsornis | A. abotti | Upper Puesto Almendra Member | A phorusrhacid | ||
| Loxornis | L. clivus | Upper Puesto Almendra Member | |||
| Physornis | P. sp. | Upper Puesto Almendra Member | A phorusrhacid | ||
| Telmabates | T. antiquus | Upper Puesto Almendra Member | A presbyornithid |
Reptiles
Crocodylomorphs
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Eocaiman | E. cavernensis | Gran Barranca Member | A caiman | ||
| Sebecus | S. icaeorhinus | Gran Barranca Member | Disarticulated skull, mandible, and some postcranial material. | A sebecid notosuchian. |
Lepidosaurs
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Chubutophis | C. grandis | Gran Barranca Member | A boa snake | ||
| Gaimanophis | G. tenuis | Trelew Member | A boa snake | ||
| Iguanidae indet. | Currently undescribed | Upper Puesto Almendra Member | |||
| Madtsoia | M. bai
M. sp. |
Gran Barranca and Upper Puesto Almendra Members | A madtsoiid snake | ||
| Waincophis | W. australis | Gran Barranca Member | A boa snake |
Testudines
| Name | Species | Member | Material | Notes | Image |
|---|---|---|---|---|---|
| Chelonoidis | C. gringorum | Trelew Member | A tortoise | ||
| Gaffneylania | G. auricularis | A meiolaniid stem-turtle | |||
| Niolamia | N. argentina | Gran Barranca Member | |||
| Testudininae indet. | Currently undescribed | Puesto Almendra Member | A tortoise |
Mammals
Meridiolestidans
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Necrolestes | N. mirabilis | Colhué Huapí Member | Youngest known meridiolestidan |
Meridiungulates
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Acoelodus | A proclivus | Gran Barranca Member | A notoungulate of uncertain affinities. | ||
| Acoelohyrax | A. sigma
A. complicatissimus |
Gran Barranca Member | A notohippid notoungulate | ||
| Adiantoides | A. magnus | Gran Barranca Member | An indaleciid litoptern | ||
| Albertogaudrya | A. carahuasensis
A. unica |
Gran Barranca Member | An astrapothere | ||
| Amilnedwardsia | A. brevicula | Gran Barranca Member | |||
| Ancylocoelus | A. frequens | Puesto Almendra Member | A leontiniid notoungulate | ||
| Anisolambda | A. amel
A. fissidens |
Gran Barranca Member | A proterotheriid litoptern | ||
| Anisotemnus | A. distentus | Gran Barranca and Vera Members | An isotemnid notoungulate | ||
| Antepithecus | A. brachystephanus
A. innexus |
Gran Barranca and Rosado Members | A notopithecid notoungulate | ||
| Archaeohyrax | A. patagonicus | Gran Barranca and Puesto Almendra Members | A archaeohyracid notoungulate | ||
| Archaeophylus | A. patrius | Puesto Almendra Member | A interatheriid notoungulate | ||
| Archaeopithecus | A. rogeri | Gran Barranca Member | A archaeopithecid notoungulate | ||
| Archaeotypotherium | A. propheticus | Puesto Almendra and Vera Members | An archaeohyracid notoungulate | ||
| Argyrohippus | A. boulei
A. fraterculus A. praecox |
Colhué Huapí and Puesto Almendra Members | |||
| Argyrohyrax | A. proavus | Puesto Almendra Member | |||
| Asmodeus | A. osborni | Puesto Almendra Member | |||
| Astraponotus | A. assymmetrus
A. dicksoni A. dilatatus A. holdichi A. thompsoni |
Gran Barranca Member | |||
| Astrapotherium | A. ruderarium | Colhué Huapí member | |||
| Astrapotheriidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Bryanpattersonia | B. sulcidens | Puesto Almendra and Vera Members | Genus probably a synonym of Archaeotypotherium | ||
| Cochilius | C. brevirostris
C. fumensis
|
Colhué Huapí and Puesto Almendra Members | |||
| Colpodon | C. distinctus
C. propinquus C. sp. |
Colhué Huapí Member | A leontiniid. | ||
| Coniopternium | C. andinum | Puesto Almendra Member | A macraucheniid litoptern | ||
| Cramauchenia | C. normalis | Colhué Huapí and Puesto Almendra Members | Nearly complete skull and humerus | A macraucheniid litoptern | |
| Cramaucheniinae indet. | Currently undescribed | Puesto Almendra Member | |||
| Deuterotherium | D. distichum | Puesto Almendra Member | |||
| Didolodus | D. multicuspsis
D. magnus D. minor D. latigonus |
Gran Barranca and Rosado Members | All species mostly known from dental remains | A didolodontid. | |
| Edvardotrouessartia | E. sola | Gran Barranca Member | |||
| Eohyrax | E. isotemnoides
E. platyodus E. praerusticus |
Gran Barranca and Rosado Members | |||
| Eolicaphrium | E. primarium | Gran Barranca Member | A litoptern | ||
| Eomorphippus | E. bondi
E. neilopdykei E. obscurus |
Rosado and Lower Puesto Almendra members | A notohippid notoungulate | ||
| Eopachyrucos | E. pliciformis
E. pliciferus |
Rosado and Puesto Almendra Members | Mandibular and skull remains | An interatheriid. | |
| Ernestohaeckelia | E. aculeata
E. acutidens |
Gran Barranca Member | A litoptern | ||
| Ernestokokenia | E. nitida
E. patagonica |
Gran Barranca Member | Mostly known from dental remains | A didolodontid. | |
| Eurygenium | E. latirostris | Puesto Almendra Member | A notohippid notoungulate | ||
| Guilielmofloweria | G. plicata | Gran Barranca Member | A proterotheriid. | ||
| Guilielmoscottia | G. plicifera | Rosado and Vera Members | A interatheriid notoungulate | ||
| Hegetotheriopsis | H. sulcatus | Trelew Member | |||
| Hegetotherium | H. novum | Trelew Member | A hegetotheriid notoungulate | ||
| Homalostylops | H. atavus
H. parvus |
Gran Barranca and Rosado Members | A notostylopid notoungulate | ||
| Henricofilholia | H. lustrata
H. cingulata H. circumdata H. intercincta H. vucetichia |
Upper Puesto Almendra Member | An astrapothere | ||
| Henricosbornia | H. ampla
H. lophodonta H. minuta |
Gran Barranca Member | |||
| Interatherium | I. sp. | Colhué Huapí Member | An interatheriid | ||
| Isotemnus | Isotemnus ctalego
Isotemnus haugi Isotemnus latidens Isotemnus primitivus |
Gran Barranca Member | |||
| Isotemnidae indet. | Currently undescribed | Puesto Almendra Member | |||
| Lambdaconus | L. lacerum | Colhué Huapí Member | |||
| Leontinia | L. gaudryi
L. sp. |
Puesto Almendra Member | |||
| Maddenia | M. lapidaria | Puesto Almendra Member | |||
| Maxschlosseria | M. consumata
M. expansa M. minima M. minuta M. praeterita M. rusticula M. septa |
Gran Barranca Member | An oldfieldthomasiid notoungulata | ||
| Medistylus | M. dorsatus | Puesto Almendra Member | |||
| Morphippus | M. complicatus
M. fraternus M. hypselodus M. imbricatus M. quadrilobus |
Puesto Almendra Member | |||
| Notopithecus | N. adapinus | Gran Barranca and Rosado Members | |||
| Notostylops | N. murinus
N. appressus N. pendens N. pigafettai N. sp. |
Gran Barranca and Rosado Members | |||
| Oldfieldthomasia | O. anfractuosa
O. debilitata O. parvidens O. transversa |
Gran Barranca Member | |||
| Othnielmarshia | O. curviristra
O. lacunifera O. reflexa |
Gran Barranca Member | |||
| Pachyrukhos | P. sp. | Colhué Huapí Member | |||
| Paginula | P. parca | Gran Barranca Member | |||
| Paramacrauchenia | P. scamnata
P. inexspectata |
Colhué Huapí Member | |||
| Parastrapotherium | P. cingulatum
P. ephebicum P. holmbergi P. lemoinei P. trouessarti P. sp. |
Colhué Huapí and Puesto Almendra Members | |||
| Patagonhippus | P. canterensis
P. dukei |
Puesto Almendra Member | A notohippid notoungulate | ||
| Paulogervaisia | P. inusta | Gran Barranca and Rosado Members | |||
| Peripantostylops | P. minutus | Gran Barranca Member | |||
| Periphragnis | P. exauctus
P. sp. |
Rosado Member | |||
| Pleurostylodon | P. complanatus
P. crassiramis P. modicus |
Gran Barranca Member | An isotemnid notoungulate | ||
| Polymorphis | P. lechei | Gran Barranca Member | A macraucheniid litoptern | ||
| Proadiantus | P. excavatus | Puesto Almendra Member | |||
| Proadinotherium | P. leptognathus | Puesto Almendra Member | A toxodontid notoungulate | ||
| Proargyrohyrax | P. curanderensis
P. sp. |
Vera Member | An interatheriid notoungulate | ||
| Proectocion | P. argentinus
P. precisus |
Gran Barranca Member | An adianthid litoptern | ||
| Progaleopithecus | P. fissurellatus
P. tournoueri P. sp. |
Puesto Almendra Member | A interatheriid notoungulate | ||
| Prohegetotherium | P. sculptum
P. sp. |
Puesto Almendra Member | |||
| Proheptaconus | P. patagonicus | Colhué Huapí and Trelew Members | An adianthid litoptern | ||
| Prolicaphrium | P. spectabile
P. specillatum |
Colhué Huapí Member | A proterotheriid litoptern | ||
| Propachyrucos | P. smithwoodwardi | Puesto Almendra Member | |||
| Propyrotherium | P. saxeum | Gran Barranca Member | |||
| Prosotherium | P. garzoni | Puesto Almendra Member | |||
| Protarchaeohyrax | P. minor | Puesto Almendra Member | A archaeohyracid notoungulate | ||
| Proterotheriidae indet. | Currently undescribed | Puesto Almendra Member | |||
| Protheosodon | P. coniferus | Puesto Almendra Member | |||
| Protypotherium | P. sp. | Colhué Huapí Member | |||
| Pseudhyrax | P. eutrachytheroides | Puesto Almendra Member | |||
| Pternoconius | P. polymorphoides
P. tournoueri P. bondi |
Colhué Huapí and Puesto Almendra Members | |||
| Puelia | P. sigma
P. coarctatus |
Gran Barranca, Rosado, and Vera Members | A notohippid notoungulate | ||
| Pyrotherium | P. romeroi | Puesto Almendra Member | |||
| Rhynchippus | R. pumilus
R. equinus R. sp. |
Puesto Almendra Member | |||
| Rosendo | R. pascuali | Vera Member | A notohippid notoungulate | ||
| Rutimeyeria | R. conulifera | Gran Barranca Member | A litoptern | ||
| Santiagorothia | S. chiliensis | Vera Member | |||
| Scaglia | S. kraglievichorum | Gran Barranca Member | |||
| Scarrittia | S. canquelensis
S. barranquensis |
Puesto Almendra Member | |||
| Sparnotheriodon | S. epsilonoides | Gran Barranca Member | |||
| Teratopithecus | T. elpidophoros | Gran Barranca Member | |||
| Tetragonostylops | T. apthomasi | Gran Barranca Member | |||
| Tetramerorhinus | T. sp. | Colhué Huapí Member | |||
| Teushentherium | T. camaronensis | Puesto Almendra Member | |||
| Theosodon | T.? frenguellii | Colhué Huapí Member | |||
| Thomashuxleya | T. rostrata | Gran Barranca Member | An isotemnid notoungulate | ||
| Trachytherus | T. spegazzinianus
T. sp. |
Puesto Almendra Member | |||
| Transpithecus | T. obtentus
T. sp. |
Gran Barranca and Rosado Members | |||
| Tricoelodus | T. bicuspidatus | Puesto Almendra Member | An adianthid litoptern | ||
| Trigonolophodon | T. elegans
T. inflatus |
Puesto Almendra Member | A homalodotheriid notoungulate | ||
| Trigonostylops | T. wortmani
T. sp. |
Gran Barranca Member | An astrapothere | ||
| Ultrapithecus | U. rutilans | Gran Barranca and Rosado Members | |||
| Victorlemoinea | V. labyrinthica
V. emarginata V. longidens V. sp. |
Gran Barranca Member |
Xenarthrans
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Archaeutatus | A. malaspinensis
A. sp. |
Upper Puesto Almendra Member | |||
| Astegotherium | A. dichotomum | Gran Barranca Member | |||
| Barrancatatus | B. rigidus
B. maddeni B. sp. |
Vera and Upper Puesto Almendra Members | |||
| Clypeotherium | C. magnum | Upper Puesto Almendra Members | |||
| Cochlops | C. sp. | Colhué Huapí Member | |||
| Glyptodontinae indet. | Currently undescribed | Colhué Huapí and Upper Puesto Almendra Members | |||
| Hapaloides | H. ignavus
H. laeviusculus H. ponderosus H. sp. |
Colhué Huapí Member | |||
| Holomegalonyx | H. menendezi | Colhué Huapí Member | |||
| Machlydotherium | M. ater
M. sparsum M. sp. |
Gran Barranca, Rosado, Upper Puesto Almendra, and Vera Members | |||
| Mazzoniphractus | M. ingens | Rosado Member | |||
| Megalonychidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Meteutatus | M. anthinus
M. ascendens M. concavus M. confluens M. lagenaformis M. lucidus M. minutus M. nepotulus M. percarinatus M. tortuosus M. sp. |
Gran Barranca, Rosado, Upper Puesto Almendra, and Vera Members | |||
| Nematherium | N. sp. | Colhué Huapí Member | |||
| Octodontotherium | O. grande
O. crassidens |
Upper Puesto Almendra Member | |||
| Palaeopeltis | P. inornatus | Upper Puesto Almendra Member | |||
| Parutaetus | P. chicoensis
P. chilensis P. clusus P. signatus |
Gran Barranca, Rosado, Upper Puesto Almendra, and Vera Members | |||
| Peltephilus | P. pumilus
P. undulatus P. sp. |
Colhué Huapí and Upper Puesto Almendra Members | |||
| Peltephilidae indet. | Currently undescribed | Colhué Huapí, Rosado, Upper Puesto Almendra, and Vera Members | |||
| Proeuphractus | P. setiger | Upper Puesto Almendra Member | |||
| Proeutatus | P. oenophorum
Proeutatus robustus P. sp. |
Colhué Huapí Member | |||
| Propalaehoplophorus | P sp. | Colhué Huapí Member | |||
| Proplatyarthrus | P longipes | Vera Member | |||
| Proschismotherium | P. oppositum
P. sp. |
Colhué Huapí Member | |||
| Prostegotherium | P. astrifer
P. notostylopianum P. sp. |
Gran Barranca Member | |||
| Prozaedyus | P. humilis
P. impressus P. planus P. sp. |
Colhué Huapí and Upper Puesto Almendra Members | |||
| Pseudoglyptodon | P. chilensis | Gran Barranca and Upper Puesto Almendra Members | |||
| Stegosimpsonia | S. chubutanum | Colhué Huapí, Gran Barranca, and Rosado Members | |||
| Stegotherium | S. caroloameghinoi
S. pascuali S. tessellatum S. variegatum |
Colhué Huapí Member | |||
| Stegotheriini indet. | Currently undescribed | Colhué Huapí, Rosado, Upper Puesto Almendra, and Vera Members | |||
| Stenotatus | S. centralis
S. patagonicus S. ornatus S sp. |
Colhué Huapí, Upper Puesto Almendra, and Vera Members | |||
| Utaetus | U. buccatus
U. deustus U. laevus U. lenis |
Gran Barranca and Rosado Members |
Metatherians
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Abderites | A. meridionalis | Colhué Huapí Member | |||
| Abderitidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Acdestodon | A. bonapartei | Upper Puesto Almendra Member | |||
| Acdestoides | A. praecursor | Upper Puesto Almendra Member | |||
| Acrocyon | A. riggsi | Colhué Huapí Member | |||
| Acyon | A. tricuspidatus | Colhué Huapí Member | |||
| Amphidolops | A. serrula | Gran Barranca Member | |||
| Anargyrolagus | A. primus | Trelew Member | |||
| Angelocabrerus | A. daptes | Gran Barranca Member | |||
| Arctodictis | A. sinclairi | Colhué Huapí Member | |||
| Arminiheringia | A auceta | Gran Barranca Member | |||
| Australohyaena | A. antiqua | Upper Puesto Almendra Member | |||
| Borhyaena | B. macrodonta | Colhué Huapí Member | |||
| Caenolestoides | C. miocaenicus | Colhué Huapí Member | |||
| Canchadelphys | C. cristata | Vera Member | |||
| Carlothentes | C. chubutensis | Upper Puesto Almendra Member | |||
| Caroloameghinia | C. mater
C. tenuis |
Gran Barranca Member | |||
| Cladosictis | C. centralis
C sp. |
Colhué Huapí Member | |||
| Clenia | C. minuscula
C. brevis |
Colhué Huapí and Vera Members | |||
| Coona | C. gaudryi
C. gutierrezi C. pattersoni |
Gran Barranca Member | |||
| Didelphimorphia indet. | Currently undescribed | Colhué Huapí Member | |||
| Eomicrobiotherium | E. matutinum
E. mykerum |
Colhué Huapí, Trelew, Upper Puesto Almendra, and Vera Members | |||
| Epikhlonia | E. verticalis | Vera Member | |||
| Eudolops | E. tetragonus | Gran Barranca Member | |||
| Evolestes | E. sp. | Upper Puesto Almendra Member | |||
| Gaimanlestes | G. pascuali | Trelew Member | |||
| Hathliacynidae indet. | Currently undescribed | Colhué Huapí and Vera Members | |||
| Hondonadia | H. fierroensis
H. parca H. praecipitia H. pumila |
Upper Puesto Almendra and Vera Members | |||
| Kramadolops | K. fissuratus
K. hernandezi K. maximus K. mayoi |
Gran Barranca, Upper Puesto Almendra, and Vera Members | |||
| Microbiotherium | M. praecursor
M. sp. |
Colhué Huapí and Vera Members | |||
| Microbiotheriidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Nemolestes | N. spalacotherinus | Gran Barranca Member | |||
| Notogale | N. mitis | Upper Puesto Almendra Member | |||
| Oligobiotherium | O. divisum | Colhué Huapí Member | |||
| Patagonia | P. peregrina | Trelew Member | A metatherian of uncertain placement | ||
| Pachybiotherium | P. acclinum | Colhué Huapí Member | |||
| Palaeothentes | P. marshalli
P. migueli P. minutus |
Colhué Huapí and Upper Puesto Almendra Members | |||
| Palaeothentidae indet. | Currently undescribed | Colhué Huapí and Upper Puesto Almendra Members | |||
| Parabderites | P. bicrispatus
P. minisculus |
Colhué Huapí and Upper Puesto Almendra Members | |||
| Periakros | P. ambiguus | Vera Member | |||
| Pharsophorus | P. lacerans
P. tenax |
Upper Puesto Almendra Member | |||
| Pichiplidae indet. | Currently undescribed | Upper Puesto Almendra and Vera Members | |||
| Pilchenia | P. antiqua
P. intermedia P. lobata P. lucina |
Upper Puesto Almendra and Vera Members | |||
| Polydolops | P. crassus
P. serra P. tetragonus P. thomasi P. unicus |
Gran Barranca Member | |||
| Praedens | P. aberrans | Vera Member | |||
| Proargyrolagus | P. argentinus | Colhué Huapí Member | |||
| Proborhyaena | P. gigantea | Upper Puesto Almendra Member | |||
| Procladosictis | P. erecta | Gran Barranca Member | |||
| Progarzonia | P. notostylopense | Gran Barranca Member | |||
| Pseudothylacynus | P. rectus | Colhué Huapí Member | |||
| Rosendolops | R. ebaios
R. primigenium |
Gran Barranca, Upper Puesto Almendra, and Vera Members | |||
| Rosendolopidae indet. | Currently undescribed | Upper Puesto Almendra and Vera Members | |||
| Sipalocyon | S. externus
S. sp. |
Colhué Huapí Member | |||
| Stilotherium | S. parvum | Colhué Huapí Member | |||
| Thylacosmilidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Trelewthentes | T. rothi | Upper Puesto Almendra Member |
Rodents
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Acarechimys | A. leucotheae
A. minutissimus A sp. |
Colhué Huapí, Puesto Almendra, and Trelew Members | |||
| Acaremys | A. preminutus
A. murinus A. sp. |
Colhué Huapí and Trelew Members | |||
| Asteromys | A. punctus
A. sp. |
Upper Puesto Almendra Member | |||
| Australoprocta | A. fleaglei | Trelew Member | |||
| Banderomys | B. leanzai | Colhué Huapí Member | |||
| Branisamyopsis | B. australis | Colhué Huapí Member | |||
| Caviocricetus | C. lucasi | Colhué Huapí and Trelew Members | |||
| Caviomorpha indet. | Currently undescribed | Upper Puesto Almendra Member | |||
| Cephalomyidae indet. | Currently undescribed | Upper Puesto Almendra Member | |||
| Cephalomyopsis | C. hipselodontus | Puesto Almendra and Trelew Members | |||
| Cephalomys | C. arcidens | Upper Puesto Almendra Member | |||
| Changquin | C. woodi | Upper Puesto Almendra Member | |||
| Chinchilloidea indet. | Currently undescribed | Colhué Huapí Member | |||
| Chubutomys | C. simpsoni
C. leucoreios |
Trelew and Upper Puesto Almendra Member | |||
| Deseadomys | D. arambourgi | Puesto Almendra Member | |||
| Dudumus | D. ruigomezi | Trelew Member | |||
| Draconomys | D. verai | Puesto Almendra Member | |||
| Eobranisamys | E sp. | Puesto Almendra Member | |||
| Eocardiidae indet. | Currently undescribed | Puesto Almendra Member | |||
| Eosteiromys | E. homogenidens
E. segregatus E. sp. |
Colhué Huapí and Trelew Members | |||
| Eoviscaccia | E. australis | Colhué Huapí, Puesto Almendra, and Trelew Members | |||
| Ethelomys | E. loomisi | Upper Puesto Almendra Member | |||
| Hypsosteiromys | H. nectus
H. axiculus |
Colhué Huapí Member | |||
| Incamys | I. bolivianus
I. menniorum |
Puesto Almendra Member | |||
| Leucokephalos | L. zeffiae | Upper Puesto Almendra Member | |||
| Litodontomys | L chubtensis | Upper Puesto Almendra Member | |||
| Llitun | L. notuca | Upper Puesto Almendra Member | |||
| Loncolicu | L. tretos | Upper Puesto Almendra Member | |||
| Luantus | L. initialis
L. minor L. propheticus L. sp. |
Colhué Huapí and Trelew Members | |||
| Neoepiblemidae indet. | Currently undescribed | Colhué Huapí Member | |||
| Neoreomys | N. pinturensis | Colhué Huapí Member | |||
| Paradelphomys | P. fissus | Colhué Huapí Member | |||
| Parasteiromys | P. friantae
P. uniformis |
Colhué Huapí Member | |||
| Perimys | P. incavatus
P. transversus P. dissimilis P. sp. |
Colhué Huapí and Trelew Members | |||
| Platypittamys | P. brachyodon | Upper Puesto Almendra Member | |||
| Prospaniomys | P. priscus
P. sp. |
Colhué Huapí and Trelew Members | |||
| Prostichomys | P. bowni | Colhué Huapí Member | |||
| Protacaremys | P. adilos
P. avunculus P. prior P. pulchellus P. sp. |
Colhué Huapí and Upper Puesto Almendra Members | |||
| Protadelphomys | P. latus
P. sp. |
Colhué Huapí and Trelew Members | |||
| Saremmys | S. ligcura | Colhué Huapí and Trelew Member | |||
| Scotamys | S. antiquus | Upper Puesto Almendra Member | |||
| Soriamys | S. gaimanensis
S. ganganensis S. sp. |
Colhué Huapí and Trelew Members | |||
| Willidewu | W. estaparius | Trelew Member | |||
| Vallehermosomys | V mazzonii | Upper Puesto Almendra Member | |||
| Xylechimys | X. obliquus | Upper Puesto Almendra Member |
Primates
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Dolichocebus | D. gaimanensis | Trelew Member | |||
| Homunculus | H. sp. | Colhué Huapí Member | |||
| Mazzonicebus | M. almendrae | Colhué Huapí Member | |||
| Tremacebus | T. harringtoni | Colhué Huapí Member |
Bats
| Name | Species | Member/Locality | Material | Notes | Image |
|---|---|---|---|---|---|
| Mormopterus | M. barrancae
M. sp. |
Colhué Huapí Member | |||
| Phyllostominae indet. | Currently undescribed | Colhué Huapí Member |