Taxonomic names from F. Ameghino 1891
- Abderites tenuissimus, F. Ameghino 1891 [Abderitidae]
- Acaremys karaikensis, F. Ameghino 1891 [Acaremyidae]
- Acdestis elatus, F. Ameghino 1891 [Palaeothentidae]
- Acdestis parvus, F. Ameghino 1891 [Palaeothentidae]
- Amnotherium, F. Ameghino 1891 [Mylodontidae]
- Amnotherium profundatum, F. Ameghino 1891 [Mylodontidae]
- Amphihapalops, F. Ameghino 1891 [Megalonychidae]
- Amphihapalops cadens, F. Ameghino 1891 [Megalonychidae]
- Amphihapalops congermanus, F. Ameghino 1891 [Megalonychidae]
- Amphihapalops gallaicus, F. Ameghino 1891 [Megalonychidae]
- Amphiproviverra manzaniana (F. Ameghino 1891) [Sparassodonta]
- Analcimorphus, F. Ameghino 1891 [Megalonychidae]
- Analcimorphus inversus, F. Ameghino 1891 [Megalonychidae]
- Analcitherium, F. Ameghino 1891 [Mylodontidae]
- Analcitherium antarticum, F. Ameghino 1891 [Mylodontidae]
- Anantiosodon, F. Ameghino 1891 [Cingulata]
- Anantiosodon rarus, F. Ameghino 1891 [Cingulata]
- Anatherium defossus, Ameghino 1887 [Sparassodonta]
- Astrapodon, F. Ameghino 1891 [Astrapotheriidae]
- Astrapodon carinatus, F. Ameghino 1891 [Astrapotheriidae]
- Astrapotherium columnatum, F. Ameghino 1891 [Astrapotheriidae]
- Astrapotherium delimitatum, F. Ameghino 1891 [Astrapotheriidae]
- Astrapotherium giganteum, F. Ameghino 1891 [Astrapotheriidae]
- Astrapotherium nanum, F. Ameghino 1891 [Astrapotheriidae]
- Brachytherini, tribe, F. Ameghino 1891 [Proterotheriidae]
- Callomenus, F. Ameghino 1891 [Caenolestidae]
- Callomenus intervalatus, F. Ameghino 1891 [Caenolestidae]
- Cladosictis defossa (Ameghino 1887) [Sparassodonta]
- Cochlops debilis, F. Ameghino 1891 [Propalaehoplophoridae]
- Conodonictis, F. Ameghino 1891 [Sparassodonta]
- Conodonictis exterminator, F. Ameghino 1891 [Sparassodonta]
- Conodonictis saevus, F. Ameghino 1891 [Sparassodonta]
- Dasypus minimus, Desmarest 1860 [Chlamyphoridae]
- Dasyura, order, F. Ameghino 1891 [Sarcobora]
- Decastis, F. Ameghino 1891 [Abderitidae]
- Decastis columnaris, F. Ameghino 1891 [Abderitidae]
- Decastis rurigerus, F. Ameghino 1891 [Abderitidae]
- Diadiaphorus diplinthius, F. Ameghino 1891 [Proterotheriidae]
- Dicardia (F. Ameghino 1891) [Eocardiidae]
- Dinamictis fera, Ameghinor 1891 [Sparassodonta]
- Diorotherium, F. Ameghino 1891 [Homalodontotheridae]
- Diorotherium egregium, F. Ameghino 1891 [Homalodontotheridae]
- Dynamictis fera (Ameghinor 1891) [Sparassodonta]
- Encinepeltus, F. Ameghino 1891 [Propalaehoplophoridae]
- Encinepeltus petesatus, F. Ameghino 1891 [Propalaehoplophoridae]
- Eocardia (Dicardia), F. Ameghino 1891 [Rodentia]
- Eocardia (Dicardia) excavata, F. Ameghino 1891 [Rodentia]
- Eocardia (Dicardia) maxima, F. Ameghino 1891 [Rodentia]
- Eocardia (Dicardia) modica, F. Ameghino 1891 [Rodentia]
- Eocardia (Procardia), F. Ameghino 1891 [Rodentia]
- Eocardia (Tricardia), F. Ameghino 1891 [Rodentia]
- Eocardia (Tricardia) crassidens, F. Ameghino 1891 [Rodentia]
- Eocardia (Tricardia) gracilis, F. Ameghino 1891 [Rodentia]
- Eocardiidae, family, F. Ameghino 1891 [Eocardiidae]
- Eodidelphys, F. Ameghino 1891 [Microbiotheriidae]
- Eodidelphys famula, F. Ameghino 1891 [Microbiotheriidae]
- Eodidelphys fortis, F. Ameghino 1891 [Microbiotheriidae]
- Epanorthus ambiguus, F. Ameghino 1891 [Caenolestidae]
- Epanorthus inaequalis, F. Ameghino 1891 [Caenolestidae]
- Epanorthus lepidus, F. Ameghino 1891 [Caenolestidae]
- Essoprion, F. Ameghino 1891 [Caenolestidae]
- Essoprion consumptus, F. Ameghino 1891 [Caenolestidae]
- Essoprion coruscus, F. Ameghino 1891 [Caenolestidae]
- Eucholoeops, Amegino 1887 [Megalonychidae]
- Eucholoeops adteger, Amegino 1887 [Megalonychidae]
- Eucholoeops externus, F. Ameghino 1891 [Megalonychidae]
- Eucholoeops fissognathus, F. Ameghino 1891 [Megalonychidae]
- Eucholoeops fronto, F. Ameghino 1891 [Megalonychidae]
- Eucholoeops latirostris, F. Ameghino 1891 [Megalonychidae]
- Eucholoeops litoralis, F. Ameghino 1891 [Megalonychidae]
- Garzonia, F. Ameghino 1891 [Caenolestidae]
- Garzonia annectens, F. Ameghino 1891 [Caenolestidae]
- Garzonia captiva, F. Ameghino 1891 [Caenolestidae]
- Garzonia minima, F. Ameghino 1891 [Caenolestidae]
- Garzonia typica, F. Ameghino 1891 [Caenolestidae]
- Garzonidae, family, F. Ameghino 1891 [Garzonidae]
- Geronops, F. Ameghino 1891 [Megalonychidae]
- Geronops circularis, F. Ameghino 1891 [Megalonychidae]
- Graphimys, F. Ameghino 1891 [Echinomyidae]
- Graphimys provectus, F. Ameghino 1891 [Echinomyidae]
- Gyrignophus, F. Ameghino 1891 [Echinomyidae]
- Gyrignophus complicatus, F. Ameghino 1891 [Echinomyidae]
- Hadrorhynchus, F. Ameghino 1891 [Microbiotheriidae]
- Hadrorhynchus conspicuus, F. Ameghino 1891 [Microbiotheriidae]
- Hadrorhynchus tortor, F. Ameghino 1891 [Microbiotheriidae]
- Hadrorhynchus torvus, F. Ameghino 1891 [Microbiotheriidae]
- Halmadromus, F. Ameghino 1891 [Caenolestidae]
- Halmadromus vagus, F. Ameghino 1891 [Caenolestidae]
- Halmarhiphus, F. Ameghino 1891 [Caenolestidae]
- Halmarhiphus didelphoides (F. Ameghino 1891) [Microbiotheriidae]
- Halmarhiphus nanus, F. Ameghino 1891 [Caenolestidae]
- Halmaselus, F. Ameghino 1891 [Caenolestidae]
- Halmaselus valens, F. Ameghino 1891 [Caenolestidae]
- Hapalops angustipalatus, F. Ameghino 1891 [Megalonychidae]
- Hapalops brevipalatus, F. Ameghino 1891 [Megalonychidae]
- Hapalops cilindricus, F. Ameghino 1891 [Megalonychidae]
- Hapalops crassidens, F. Ameghino 1891 [Megalonychidae]
- Hapalops crassignathus, F. Ameghino 1891 [Megalonychidae]
- Hapalops depressipalatus, F. Ameghino 1891 [Megalonychidae]
- Hapalops diverssidens, F. Ameghino 1891 [Megalonychidae]
- Hapalops elongatus, F. Ameghino 1891 [Megalonychidae]
- Hapalops gracilidens, F. Ameghino 1891 [Megalonychidae]
- Hapalops longipalatus, F. Ameghino 1891 [Megalonychidae]
- Hapalops minutus, F. Ameghino 1891 [Megalonychidae]
- Hapalops robustus, F. Ameghino 1891 [Megalonychidae]
- Hapalops subcuadratus, F. Ameghino 1891 [Megalonychidae]
- Hapalops testudinatus, F. Ameghino 1891 [Megalonychidae]
- Hegetotherium costatum, F. Ameghino 1891 [Notoungulata]
- Hegetotherium cuneatum, F. Ameghino 1891 [Notoungulata]
- Homalodontotherium segoviae, F. Ameghino 1891 [Homalodontotheridae]
- Homunculus, F. Ameghino 1891 [Homunculidae]
- Homunculus patagonicus, F. Ameghino 1891 [Homunculidae]
- Ictioborus, F. Ameghino 1891 [Sparassodonta]
- Ictioborus fenestratus, F. Ameghino 1891 [Sparassodonta]
- Licaphrium intermedium, F. Ameghino 1891 [Proterotheriidae]
- Licaphrium parvulum, F. Ameghino 1891 [Proterotheriidae]
- Lomomys, F. Ameghino 1891 [Echinomyidae]
- Lomomys evexus, F. Ameghino 1891 [Echinomyidae]
- Lymodon, F. Ameghino 1891 [Mylodontidae]
- Lymodon auca, F. Ameghino 1891 [Mylodontidae]
- Lymodon perfectus, F. Ameghino 1891 [Mylodontidae]
- Mesorhinidae, family, F. Ameghino 1891 [Mesorhinidae]
- Metopotherium, F. Ameghino 1891 [Megalonychidae]
- Metopotherium splendens, F. Ameghino 1891 [Megalonychidae]
- Microbiotherium forticulum, F. Ameghino 1891 [Microbiotheriidae]
- Necrolestes, F. Ameghino 1891 [Meridiolestida]
- Necrolestes patagonensis, F. Ameghino 1891 [Meridiolestida]
- Nematherium longirostris, F. Ameghino 1891 [Mylodontidae]
- Neoreomys (Pseudoneoreomys), F. Ameghino 1891 [Rodentia]
- Neoreomys (Pseudoneoreomys) leptorhynchus, F. Ameghino 1891 [Rodentia]
- Neoreomys (Pseudoneoreomys) mesorhynchus, F. Ameghino 1891 [Rodentia]
- Neoreomys (Pseudoneoreomys) pachyrhynchus, F. Ameghino 1891 [Rodentia]
- Paraplanops, F. Ameghino 1891 [Megalonychidae]
- Paraplanops oblongus, F. Ameghino 1891 [Megalonychidae]
- Parhapalops, F. Ameghino 1891 [Ortotheridae]
- Parhapalops rectangulidens, F. Ameghino 1891 [Ortotheridae]
- Patriarchus altus, F. Ameghino 1891 [Interatheriidae]
- Patriarchus diastematus, F. Ameghino 1891 [Interatheriidae]
- Patriarchus distortus, F. Ameghino 1891 [Interatheriidae]
- Patriarchus furculosus, F. Ameghino 1891 [Interatheriidae]
- Patriarchus leptocephalus, F. Ameghino 1891 [Interatheriidae]
- Patriarchus rectus, F. Ameghino 1891 [Interatheriidae]
- Pelecyodon, F. Ameghino 1891 [Eufolivora]
- Pelecyodon arcuatus, F. Ameghino 1891 [Eufolivora]
- Pelecyodon cristatus, F. Ameghino 1891 [Eufolivora]
- Pelecyodon maximus, F. Ameghino 1891 [Eufolivora]
- Pelecyodon petraeus, F. Ameghino 1891 [Eufolivora]
- Pelecyodon robustus, F. Ameghino 1891 [Eufolivora]
- Peltephilus ferox, F. Ameghino 1891 [Cingulata]
- Perathereutes, F. Ameghino 1891 [Sparassodonta]
- Perathereutes amputans, F. Ameghino 1891 [Sparassodonta]
- Perathereutes obtusus, F. Ameghino 1891 [Sparassodonta]
- Perathereutes pungens, F. Ameghino 1891 [Sparassodonta]
- Perimys angulatus, F. Ameghino 1891 [Neoepiblemidae]
- Perimys scalaris, F. Ameghino 1891 [Neoepiblemidae]
- Pichipilus exilis, F. Ameghino 1891 [Caenolestidae]
- Planops obesus, F. Ameghino 1891 [Megatheriidae]
- Prepotherium potens, F. Ameghino 1891 [Megatheriidae]
- Procardia (F. Ameghino 1891) [Eocardiidae]
- Prodidelphys, F. Ameghino 1891 [Microbiotheriidae]
- Prodidelphys acicula, F. Ameghino 1891 [Microbiotheriidae]
- Prodidelphys obtusa, F. Ameghino 1891 [Microbiotheriidae]
- Prodidelphys pavita, F. Ameghino 1891 [Microbiotheriidae]
- Proeutatus, F. Ameghino 1891 [Chlamyphoridae]
- Propalaehoplophorus minus, F. Ameghino 1891 [Propalaehoplophoridae]
- Proterotherini, tribe, F. Ameghino 1891 [Proterotheriidae]
- Proterotherium cingulatum, F. Ameghino 1891 [Proterotheriidae]
- Proterotherium curtidens, F. Ameghino 1891 [Proterotheriidae]
- Prothylacynus, F. Ameghino 1891 [Sparassodonta]
- Prothylacynus patagonicus, F. Ameghino 1891 [Sparassodonta]
- Protoproviverra, F. Ameghino 1891 [Sparassodonta]
- Protoproviverra ensidens, F. Ameghino 1891 [Sparassodonta]
- Protoproviverra manzaniana, F. Ameghino 1891 [Sparassodonta]
- Protoproviverra obtusa, F. Ameghino 1891 [Sparassodonta]
- Protypotherium compressidens, F. Ameghino 1891 [Interatheriidae]
- Protypotherium convexidens, F. Ameghino 1891 [Interatheriidae]
- Protypotherium diversidens, F. Ameghino 1891 [Interatheriidae]
- Protypotherium furculosus (F. Ameghino 1891) [Interatheriidae]
- Protypotherium globosum, F. Ameghino 1891 [Interatheriidae]
- Protypotherium leptocephalus (F. Ameghino 1891) [Interatheriidae]
- Protypotherium rectus (F. Ameghino 1891) [Interatheriidae]
- Prozaedius, F. Ameghino 1891 [Chlamyphoridae]
- Pseudhapalops, F. Ameghino 1891 [Megalonychidae]
- Pseudhapalops forticulus, F. Ameghino 1891 [Megalonychidae]
- Pseudhapalops longitudinalis, F. Ameghino 1891 [Megalonychidae]
- Pseudhapalops observationis, F. Ameghino 1891 [Megalonychidae]
- Pseudocoelosoma, F. Ameghino 1891 [Mesorhinidae]
- Pseudocoelosoma patagonica, F. Ameghino 1891 [Mesorhinidae]
- Pseudoneoreomys (F. Ameghino 1891) [Rodentia]
- Scelidotheridae, family (Ameghino 1889) [Mylodontidae]
- Schistomys crassus, F. Ameghino 1891 [Eocardiidae]
- Sipalocyon pusillus, F. Ameghino 1891 [Sparassodonta]
- Stichomys diminutus, F. Ameghino 1891 [Rodentia]
- Stichomys gracilis, F. Ameghino 1891 [Rodentia]
- Stichomys planus, F. Ameghino 1891 [Rodentia]
- Stylognathus, F. Ameghino 1891 [Microbiotheriidae]
- Stylognathus diprotodontoides, F. Ameghino 1891 [Microbiotheriidae]
- Theosodon fontanae, F. Ameghino 1891 [Macraucheniidae]
- Theosodon gracilis, F. Ameghino 1891 [Macraucheniidae]
- Theosodon patagonicum, F. Ameghino 1891 [Macraucheniidae]
- Thoatherium crepidatum, F. Ameghino 1891 [Proterotheriidae]
- Thylacynidae, family (C. L. Bonaparte 1838) [Thylacinidae]
- Trematherium nanum, F. Ameghino 1891 [Megalonychidae]
- Tricardia (F. Ameghino 1891) [Eocardiidae]
- Typotheridae, family () [Typotheriidae]
- Xyophorus andinus, F. Ameghino 1891 [Nothrotheriidae]
- Xyophorus atlanticus, F. Ameghino 1891 [Nothrotheriidae]
- Xyophorus sulcatus, F. Ameghino 1891 [Nothrotheriidae]