Casamayoran of Patagonia: Casamayoran, Argentina
collected by Carlos Ameghino 1900
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Cingulata
- Dasypodidae
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Astegotherium dichotomus n. gen., n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
corrected as Astegotherium dichotomum | ||||||||||
MACN 10421, 21 scutes | ||||||||||
Anteutatus lenis n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
recombined as Utaetus lenis | ||||||||||
MACN 10425, seven scutes | ||||||||||
Mammalia
- Astrapotheria
- Trigonostylopidae
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Hedralophus bicostatus n. gen., n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Trigonostylopidae | ||||||||||
MACN 10938, P3 or P4 (lectotype); other referred material probably not conspecific | ||||||||||
Albertogaudrya unica n. gen., n. sp.
Ameghino 1901
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Simpson 1967 | 2 specimens | ||||||||
MACN 12000, upper molar (lectotype), other associated teeth; fragments and an astragalus; MACN 12001, mandible with right p2-m3 and left p4-m3 | ||||||||||
Mammalia
- Notoungulata
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Adpithecus secans n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Notopithecus adapinus | ||||||||||
MACN 10790, skull and jaws | ||||||||||
Antepithecus gradatus n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Notopithecus adapinus | ||||||||||
MACN 10828, two left upper molars and a maxillary fragment | ||||||||||
Transpithecus obtentus
Ameghino 1901
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Vera 2012 | 2 specimens | ||||||||
MACN-A 10691a, maxillary M1-2; MACN-A 10691b, M1 | ||||||||||
Patriarchippus annectens n. gen., n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Transpithecus obtentus | ||||||||||
MACN 10691, maxilla M1-2 (lectotype); unassociated M2 | ||||||||||
Pseudadiantus imperfectus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Antepithecus brachystephanus | ||||||||||
MACN 10669(b), dentary p1-2 | ||||||||||
Pseudadiantus secans n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Antepithecus brachystephanus | ||||||||||
MACN 10669(a), dentary p2-3 | ||||||||||
Adpithecus reduncus n. sp.
Ameghino 1902
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Simpson 1967 | 2 specimens | ||||||||
synonym of Antepithecus brachystephanus | ||||||||||
MACN 10858, dentary m2-3 (lectotype), dentary m1-2 | ||||||||||
Notopithecus summus n. sp.
Ameghino 1897
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1 specimen | |||||||||
nomen dubium belonging to Notoungulata | ||||||||||
Type not relocated by Simpson (1967), a humerus | ||||||||||
Mammalia
- Notoungulata
- Oldfieldthomasiidae
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Pleurostylodon minimus n. sp.
Ameghino 1897
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Simpson 1967 | 2 specimens | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10572, left M2 (lectotype) and right M3 | ||||||||||
Infrapithecus expansus n. sp.
Ameghino 1902
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Simpson 1967 | 3 specimens | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10856, three unassociated lower jaws | ||||||||||
Acoelodus microdon n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Paginula parca | ||||||||||
MACN 10698, dentary p2-4 | ||||||||||
Mammalia
- Notoungulata
- Notostylopidae
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Entelostylops cestillus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
nomen vanum belonging to Notostylops | ||||||||||
Type not relocated. M1-3. | ||||||||||
Notostylops escaridus n. sp.
Ameghino 1901
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Simpson 1948 | 2 specimens | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10510, skull fragments with upper cheek teeth (lectotype); MACN 10509, right dentary p2-m2 | ||||||||||
Anastylops vallatus n. gen., n. sp.
Ameghino 1897
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3 specimens | |||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10469, two upper premolars and an incisor | ||||||||||
Notostylops complexus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
Type not relocated. Referred: MACN 10532, left M1-3, isolated left M2 and M3 | ||||||||||
Dimerostephanos chicoensis n. sp.
Ameghino 1902
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Simpson 1948 | 5 specimens | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10647, right p3-4 (lectotype), m2, p1-2, p2, p3 | ||||||||||
Notostylops brachycephalus n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10499, nearly perfect skull | ||||||||||
Notostylops irregularis n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10523, mandible with right i1-2, p2-m1, left i2 and p2-3 | ||||||||||
Pliostylops magnificus n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10486, left p4-m3 | ||||||||||
Edvardotrouessartia sola n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
Type not relocated. Right dentary with p2-m3. | ||||||||||
Mammalia
- Notoungulata
- Henricosborniidae
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Henricosbornia lophodonta n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10808, maxillary with P3-M3; right lower jaw fragment with m2 and broken m1 | ||||||||||
Microstylops monoconus n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10713, right M1 or M2 | ||||||||||
Hemistylops paucicuspidatus n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10714, left M3 | ||||||||||
Pantostylops completus n. sp.
Ameghino 1902
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Simpson 1948 | 2 specimens | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10716, two right upper molars | ||||||||||
Microstylops clarus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10715, right M1 or M2 | ||||||||||
Prohyracotherium patagonicum n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10675, left M1 or M2 | ||||||||||
Prohyracotherium matutinum n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10676, left M1 or M2 | ||||||||||
Selenoconus spiculatus n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10795, right m3 | ||||||||||
Hemistylops trigonostyloides n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10710, broken right M3 | ||||||||||
Mammalia
- Notoungulata
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Acoelodus terminalis n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
MACN 10755, M?1 | ||||||||||
Acoelodus oppositus n. sp.
Ameghino 1897
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Simpson 1967 | 1 specimen | ||||||||
MACN 10770, dentary fragment with p2-3 and part of p4. Original type but replaced by a neotype from Gran Barranca by Simpson (1967). Simpson (1970, ref. 57986) indicated that this action is invalid and that the original type remains valid. | ||||||||||
Acoelodus debilitatus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
MACN 10376, skull, holotype; MACN 10400, partial skull | ||||||||||
Lophiodonticulus retroversus n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Notoungulata | ||||||||||
MACN 10636, dentary m1-2. Simpson (1967b, ref. 57943) listed the type locality as Río Chico Oeste, but Simpson (1967a, ref. 10312) records it as just 'Casamayoran ("Partie supérieure")' | ||||||||||
Mammalia
- Notoungulata
- Isotemnidae
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Prostylops typus n. gen., n. sp.
Ameghino 1897
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1 specimen | |||||||||
nomen dubium belonging to Isotemnus | ||||||||||
Type not relocated by Simpson (1967), a broken right lower molar. Referred material from Gran Barranca is Isotemnus latidens. | ||||||||||
Isotemnus cuspidatus n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
synonym of Isotemnus latidens | ||||||||||
Type not relocated by Simpson (1967) | ||||||||||
Isotemnus primitivus n. gen., n. sp.
Ameghino 1897
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1 specimen | |||||||||
MACN 10556, maxilla P2-M3, type | ||||||||||
Eochalicotherium cretaceum n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
synonym of Isotemnus primitivus | ||||||||||
Type not relocated by Simpson (1967) | ||||||||||
Acoelohyrax coronatus n. gen., n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
MACN 10781, left P4 (type or lectotype) | ||||||||||
Pleurostylodon notabilis n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
nomen dubium belonging to Pleurostylodon | ||||||||||
No material relocated by Simpson (1967), but said to be from the Casamayoran. | ||||||||||
Pleurostylodon bifidus n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Pleurostylodon | ||||||||||
No material relocated by Simpson (1967), but said to be based on a partial dentary with teeth | ||||||||||
Pleurostylodon complanatus n. sp.
Ameghino 1902
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Simpson 1967 | 3 specimens | ||||||||
MACN 10564, three upper molars, including the type | ||||||||||
Pleurostylodon neglectus n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Pleurostylodon complanatus | ||||||||||
MACN 10568, M3 | ||||||||||
Pleurostylodon irregularis n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Pleurostylodon complanatus | ||||||||||
Type apparently the same specimen as _P. complanatus_. MACN 10575, isolated M3, was also referred. | ||||||||||
Pleurostylodon modicus n. gen., n. sp.
Ameghino 1897
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1 specimen | |||||||||
MACN 10566, maxilla M1-3, type | ||||||||||
Pleurostylodon limpidus n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Pleurostylodon modicus | ||||||||||
MACN 10573, M3 | ||||||||||
Pleurostylodon plexus n. sp.
Ameghino 1901
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Simpson 1967 | 3 specimens | ||||||||
synonym of Pleurostylodon modicus | ||||||||||
MACN 10570, right M1, left M1 (lectotype), and left M2 | ||||||||||
Pleurostylodon sinuosus n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
synonym of Pleurostylodon modicus | ||||||||||
MACN 10571, broken M1 | ||||||||||
Parastylops coelodus n. gen., n. sp.
Ameghino 1897
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4 specimens | |||||||||
synonym of Pleurostylodon modicus | ||||||||||
MACN 10618, two upper and two lower molars, including left M3, lectotype | ||||||||||
Pleurostylodon similis n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
MACN 10549, maxilla P4-M3 | ||||||||||
Thomashuxleya principialis n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Isotemnidae | ||||||||||
MACN 10937, dentary m2-3 | ||||||||||
Thomashuxleya rostrata n. gen., n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
MACN 10370, mandible i2-p4 (lectotype) and maxilla I1-P4 | ||||||||||
Thomashuxleya robusta n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
synonym of Thomashuxleya rostrata | ||||||||||
Type not relocated by Simpson (1967), lower teeth | ||||||||||
Thomashuxleya externa
Ameghino 1901
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Simpson 1967 | 3 specimens | ||||||||
MACN 10544, m1-3; MACN 10639; right p4-m2 and left m2-3; MACN 10543, teeth tooth fragments | ||||||||||
Thomashuxleya artuata n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Thomashuxleya externa | ||||||||||
MACN 10540, mandible with alveoli of c-p2, crowns of p3-m3 | ||||||||||
Mammalia
- Notoungulata
- Archaeopithecidae
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Acropithecus tersus n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Archaeopithecus rogeri | ||||||||||
MACN 10850, three upper teeth including the lectotype M?3 | ||||||||||
Mammalia
- Notoungulata
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Epitypotherium cancellatum n. gen., n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Notoungulata | ||||||||||
MACN 10699, astragalus | ||||||||||
Lophiodonticulus patagonicus n. gen., n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Notoungulata | ||||||||||
MACN 10637, dentary m1-2. Simpson (1967b, ref. 57943) listed the type locality as Río Chico Oeste, but Simpson (1967a, ref. 10312) records it as just 'Casamayoran ("Partie supérieure")' | ||||||||||
Mammalia
- Panameriungulata
- Proterotheriidae
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Heterolambda lunulata n. gen., n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
recombined as Ricardolydekkeria lunulata | ||||||||||
Isolated upper cheek tooth. Lost, but cast preserved (AMNH 11876). Simpson (1967) relocated the holotype, MACN A55-4. | ||||||||||
Ricardolydekkeria cinctula n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
MACN 10705, right upper cheek tooth | ||||||||||
Anisolambda fissidens n. sp.
Ameghino 1901
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Simpson 1948 | 2 specimens | ||||||||
MACN 10668, right m1-2 (lectotype) and left m1-2 of two individuals | ||||||||||
Lambdaconus suinus n. gen., n. sp.
Ameghino 1897
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1 specimen | |||||||||
MACN 10718, dentary ?m2 | ||||||||||
Mammalia
- Panameriungulata
- Protolipternidae
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Asmithwoodwardia subtrigona n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10723, one upper molar (probably M2) and one lower molar (m1 or m2). Upper is the lectotype. | ||||||||||
Mammalia
- Panameriungulata
- Macraucheniidae
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Ernestohaeckelia aculeata n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
"Presumably an isolated upper molar. Not found." | ||||||||||
Mammalia
- Panameriungulata
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Eolicaphrium primarium n. gen., n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
Not found. Fragment of lower jaw with i1, i3; alveoli of i2, c, p1-2 | ||||||||||
Mammalia
- Panameriungulata
- Didolodontidae
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Didolodus multicuspis n. sp.
Ameghino 1897
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Simpson 1948 | 1 specimen | ||||||||
MACN 10690, left maxilla with P2-M3 | ||||||||||
Didolodus crassicuspis n. sp.
Ameghino 1901
|
Simpson 1948 | 1 specimen | ||||||||
synonym of Didolodus multicuspis | ||||||||||
MACN 10689, right p2-m3 | ||||||||||
Didolodus dispar n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Didolodus multicuspis | ||||||||||
MACN 10733, broken right M2 | ||||||||||
Argyrolambda conidens n. gen., n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
synonym of Didolodus multicuspis | ||||||||||
MACN A55-8, crown cap of a right upper molar | ||||||||||
Ernestokokenia nitida n. sp.
Ameghino 1901
|
Simpson 1948 | 1 specimen | ||||||||
MACN 10735, left m2 and broken left m3 | ||||||||||
Ernestokokenia marginata n. sp.
Ameghino 1901
|
Simpson 1948 | 1 specimen | ||||||||
synonym of Ernestokokenia nitida | ||||||||||
MACN 10722, left m1 | ||||||||||
Mammalia
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Caroloameghinia tenuis n. sp.
(Ameghino 1901)
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Simpson 1948 | 1 specimen | ||||||||
MACN 10345, maxilla M1-4, holotype | ||||||||||
Caroloameghinia mater n. gen., n. sp.
Ameghino 1901
|
Simpson 1967 | 1 specimen | ||||||||
MACN A55-13, holotype, mandible | ||||||||||
Odontomysops spiniferus n. gen., n. sp.
Ameghino 1902
|
Simpson 1948 | 1 specimen | ||||||||
nomen vanum belonging to Marsupialia | ||||||||||
"Upper incisor and fragment of lower jaw with incisor root, three alveoli, and an unerupted tooth. Present whereabouts of type unknown." Simpson (1967) relocated the types, MACN A55-2a (subconical tooth, canine or perhaps incisor), A55-2b, anterior fragment of left dentary with fragments of teeth), A55-2c (small lower jaw fragment). The specimens probably are not conspecific. | ||||||||||
Mammalia
- Sparassodonta
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Argyrolestes peralestinus n. gen., n. sp.
Ameghino 1902
|
Simpson 1948 | 1 specimen | ||||||||
MACN 10331, broken upper molar, holotype | ||||||||||
Mammalia
- Polydolopidae
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Anadolops thylacoleoides n. gen., n. sp.
Ameghino 1904
|
Simpson 1948 | 1 specimen | ||||||||
synonym of Amphidolops serrula | ||||||||||
MACN 10339, mandible m2-4, holotype | ||||||||||
Polydolops clavulus n. sp.
Ameghino 1902
|
Simpson 1948 | 2 specimens | ||||||||
MACN 10356, mandible p3-m2, lectotype; MACN 10360, mandible m1-3 | ||||||||||
Polydolops serra n. sp.
Ameghino 1902
|
Simpson 1948 | 1 specimen | ||||||||
MACN 10341, mandible with p3, m1, fragment of m2, lectotype | ||||||||||
Polydolops thomasi
Ameghino 1897
|
Simpson 1948 | 5 specimens | ||||||||
MACN 10337, mandible with p3-m4; MACN 10343, mandible with m3-4; from ref. 57557 (Marshall 1982): MACN 10350, 10351, 16382 | ||||||||||
Orthodolops sciurinus n. sp.
Ameghino 1904
|
Simpson 1948 | 1 specimen | ||||||||
synonym of Polydolops thomasi | ||||||||||
MACN 10336, mandible with broken p3-m2 and complete m3-4 | ||||||||||
Mammalia
|
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Pachypithecus macrognathus n. gen., n. sp.
Ameghino 1897
|
1 specimen | |||||||||
nomen dubium belonging to Mammalia | ||||||||||
MACN 10817, edentulous mandible | ||||||||||
Anisorhizus atriarius n. gen., n. sp.
Ameghino 1902
|
Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Mammalia | ||||||||||
MACN 10620, cheek tooth | ||||||||||
Archaeorycteropus patagonicus n. sp.
Ameghino 1905
|
Simpson 1948 | 1 specimen | ||||||||
nomen vanum belonging to Mammalia | ||||||||||
Broken distal tibia, not found in Ameghino collection | ||||||||||
Anagonia insulata n. gen., n. sp.
Ameghino 1904
|
Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Mammalia | ||||||||||
MACN 10635, ?p4 | ||||||||||
see common names |
Geography
Country: | Argentina | State/province: | Chubut |
Coordinates: | 45.7° South, 68.7° West (view map) | ||
Paleocoordinates: | 48.2° South, 58.7° West | ||
Basis of coordinate: | based on political unit | ||
Geographic resolution: | basin |
Time
Period: | Paleogene | Epoch: | Eocene |
10 m.y. bin: | Cenozoic 2 | ||
Key time interval: | Casamayoran | Mammal zone: | Casamayoran |
Age range of interval: | 55.80000 - 48.00000 m.y. ago |
Stratigraphy
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Vacan and Barrancan sub-ages of the Casamayoran SALMA, Middle to Late Eocene (Woodburne et al. 2014). |
Lithology and environment
Primary lithology: | not reported |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
Collection methods: | survey of museum collection | ||
Reason for describing collection: | taxonomic analysis | ||
Collectors: | Carlos Ameghino | Collection dates: | c. 1900 |
Metadata
Database number: | 176285 | ||
Authorizer: | J. Zijlstra | Enterer: | J. Zijlstra |
Modifier: | M. Kouvari | Research group: | vertebrate |
Created: | 2016-02-06 01:07:41 | Last modified: | 2020-09-22 03:18:49 |
Access level: | the public | Released: | 2016-02-06 01:07:41 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
36444. | F. Ameghino. 1897. Mammiféres crétacés de l’Argentine (Deuxième contribution à la connaissance de la fauna mammalogique de couches à Pyrotherium) [Cretaceous mammals of Argentina (second contribution to the knowledge of the mammalian fauna of the Pyrotherium Beds)]. Boletin Instituto Geografico Argentino 18(4–9):406-521 [M. Uhen/M. Uhen/M. Carrano] |
Secondary references:
10369 | G. G. Simpson. 1948. The beginning of the age of mammals in South America. Part I. Bulletin of the American Museum of Natural History 91:1-232 [D. Croft/D. Croft/R. Butler] | |
10312 | G. G. Simpson. 1967. The beginning of the age of mammals in South America. Part II. Bulletin of the American Museum of Natural History 137:1-260 [D. Croft/D. Croft/K. Pino] | |
58097 | B. Vera. 2012. Revisión del género Transpithecus Ameghino, 1901 (Notoungulata, Interatheriidae) del Eoceno medio de Patagonia, Argentina. Ameghiniana 49(1):60-74 [J. Zijlstra/J. Zijlstra/J. Zijlstra] |