List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Sebecidae
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Sebecus sp.
Stirton 1953
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Colbert 1946 | 1 specimen | ||||||||
MACN 10872, tooth. Identified by Ameghino as a dinosaur and by Simpson as possibly something like _Florentinoameghinia_ (Simpson, 1932, ref. 42601). Later identified as _Sebecus_. | ||||||||||
Mammalia
- Notoungulata
- Notostylopidae
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Notostylops aspectans n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10528, maxilla with M2-3 and broken M1, part of right dentary with broken m2 | ||||||||||
Entelostylops tripartitus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Notostylops murinus | ||||||||||
MACN 10491, maxilla with parts of P3-M3 | ||||||||||
Catastylops pendens n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
recombined as Notostylops pendens | ||||||||||
MACN 10472, crushed right maxilla with P3-M2 | ||||||||||
Mammalia
- Notoungulata
- Henricosborniidae
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Postpithecus curvicrista n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
recombined as Othnielmarshia curvicrista | ||||||||||
MACN 10806. "A number of isolated teeth, not associated and perhaps not all conspecific, including isolated left m1 or m2, isolated left m3, left m1 or m2 in fragment of jaw, and right m1 or m2 in fragment of jaw. The isolated m1 or m2 and m3 were later figured (Ameghino, 1906, fig. 77), but the type description was evidently based entirely on one tooth, a m1 or m2, and the measurements given are closer to those of the isolated m1 or m2 (not in jaw fragment) in the present lot of material. This is therefore designated lectotype." | ||||||||||
Othnielmarshia lacunifera n. gen., n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10807, complete left M1 or M2 (lectotype), broken M1 or M2, fragment of M1 or M2. May not all be conspecific. | ||||||||||
Postpithecus reflexus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
recombined as Othnielmarshia reflexa | ||||||||||
MACN 10803. "Three fragmentary lower jaws, one with m1-2, one with p4-m1, and one with p3-4. They are not associated, and the last mentioned, at least, probably does not belong to this species, or indeed family. The type description was probably based entirely on the first specimen, with m1-2, and this was also figured. It is therefore the type or lectotype." | ||||||||||
Polystylops amplus n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
recombined as Henricosbornia ampla | ||||||||||
MACN 10709, left M3 | ||||||||||
Henricosbornia subconica n. sp.
Ameghino 1904
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Chitaley 1949 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10809, left M3 | ||||||||||
Selenoconus senex n. sp.
Ameghino 1901
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Simpson 1948 | 3 specimens | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10792, left m3 (lectotype), right m1 or m2, left m1 or m2 | ||||||||||
Henricosbornia alouatina n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10810, left M1 or M2 | ||||||||||
Selenoconus centralis n. sp.
Ameghino 1901
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Simpson 1948 | 4 specimens | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10797, left m2-3 (holotype or lectotype); unassociated m3, dm4, m3 | ||||||||||
Polystylops progrediens n. sp.
Ameghino 1904
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10708, left M3 | ||||||||||
Pantostylops incompletus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10707, left M3 | ||||||||||
Pantostylops typus n. sp.
Ameghino 1901
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Simpson 1948 | 4 specimens | ||||||||
synonym of Henricosbornia lophodonta | ||||||||||
MACN 10717, left M1 or M2 (lectotype), right M1 or M2, two broken upper molars | ||||||||||
Pantostylops minutus n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
recombined as Peripantostylops minutus | ||||||||||
MACN 10711, right M1 or M2 | ||||||||||
Selenoconus agilis n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Peripantostylops minutus | ||||||||||
MACN 10796, left dentary with m2-3 and broken m1 | ||||||||||
Mammalia
- Notoungulata
- Archaeopithecidae
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Archaeopithecus alternans n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Archaeopithecus rogeri | ||||||||||
MACN 10815, maxilla M1-3 | ||||||||||
Archaeopithecus rigidus n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
synonym of Archaeopithecus rogeri | ||||||||||
MACN 10813, nine specimens with 1-5 upper teeth each, including a left maxilla with P4-M2 (lectotype) | ||||||||||
Mammalia
- Notoungulata
- Isotemnidae
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Isotemnus consummatus n. sp.
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Simpson 1967 | 1 specimen | ||||||||
MACN 10580, maxilla with broken P4-M3 | ||||||||||
Isotemnus primitivus
Ameghino 1897
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Simpson 1967 | 1 specimen | ||||||||
MACN 10598, dentary with m3 and partial m2, referred to _Eochalicotherium cretaceum_ | ||||||||||
Isotemnus latidens
(Ameghino 1901)
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Eochalicotherium crassidens n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Isotemnus latidens | ||||||||||
MACN 10601, dentary m2 and partial m1 | ||||||||||
Isotemnus enecatus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Isotemnus latidens | ||||||||||
MACN 10587, maxilla P4-M3 | ||||||||||
Eochalicotherium robustum n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Isotemnus latidens | ||||||||||
MACN 10594, dentary m?2 (lectotype), other specimens in same lot may not be conspecific | ||||||||||
Isotemnus apicatus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Isotemnus latidens | ||||||||||
MACN 10614, maxilla P3-M2 | ||||||||||
Thomashuxleya externa
Ameghino 1901
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Dialophus recticrista n. sp.
Ameghino 1904
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Simpson 1967 | 1 specimen | ||||||||
recombined as Pleurostylodon recticrista | ||||||||||
MACN 10590, dentary with ?dp4 and ?m1 | ||||||||||
Coelostylops crassus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Pleurostylodon similis | ||||||||||
MACN 10476, right M3 | ||||||||||
Anisotemnus distentus
(Ameghino 1901)
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Isotemnus lophiodontoides n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Anisotemnus distentus | ||||||||||
MACN 10615, broken M2 (type or lectotype), two broken P4s, three other tooth fragments | ||||||||||
Mammalia
- Notoungulata
- Oldfieldthomasiidae
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Paginula parca n. gen., n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
MACN 10596, dentary fragment with m3 and partial m2 | ||||||||||
Oldfieldthomasia debilitata
(Ameghino 1901)
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Simpson 1967 | 1 specimen | ||||||||
original and current combination Acoelodus debilitatus | ||||||||||
MACN 10744, dentary m2-3 | ||||||||||
Maxschlosseria praeterita n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
MACN 10624, maxilla P4-M3 | ||||||||||
Eochalicotherium minutum n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10595, dentary with roots of p4 and crowns of m1-2 (type) | ||||||||||
Antepithecus plexostephanos n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10840, a M?2 (type or lectotype); ?dP4, partial upper molars under the same number may not be this species | ||||||||||
Maxschlosseria anatona n. sp.
Ameghino 1902
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Simpson 1967 | 1 specimen | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10617, maxilla with P4-M1 and partial M2-3 | ||||||||||
Oldfieldthomasia septa n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10758, maxilla with three teeth (type); four isolated lower teeth | ||||||||||
Ultrapithecus rusticulus n. sp.
Ameghino 1901
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Simpson 1967 | 3 specimens | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10819, maxilla P4-M3 (type or lectotype), left P4-M3, left dentary m1-3 | ||||||||||
Oldfieldthomasia marginalis n. sp.
Ameghino 1901
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Simpson 1967 | 3 specimens | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10751, maxilla P4-M2 (type), maxilla M1-2, mandible p2-m1. Other specimes under 10751 are probably not this species. | ||||||||||
Isotemnus emundatus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Maxschlosseria praeterita | ||||||||||
MACN 10578, maxilla with P4 and broken M1-2 | ||||||||||
Mammalia
- Notoungulata
- Archaeohyracidae
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Eohyrax rusticus n. sp.
Ameghino 1901
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Simpson 1967 | 5 specimens | ||||||||
MACN 10775, five jaw fragments: p4-m2 (lectotype), m1-2, M1-3, P1-M2, M1-2 | ||||||||||
Mammalia
- Notoungulata
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Pleurostylops glebosus n. gen., n. sp.
(Ameghino 1901)
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Simpson 1967 | 1 specimen | ||||||||
nomen dubium belonging to Notoungulata | ||||||||||
MACN A55-5, broken upper molariform | ||||||||||
Acoelodus connectus n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Transpithecus obtentus | ||||||||||
MACN 10747, dentary fragment with m1-3 | ||||||||||
Antepithecus brachystephanus
Ameghino 1901
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Vera and Cerdeño 2014 | |||||||||
MACN-A 10827, 10842, 10857 | ||||||||||
Gonopithecus trigodontoides n. sp.
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Simpson 1967 | 4 specimens | ||||||||
synonym of Notopithecus | ||||||||||
MACN 10827, three right upper molars and a right upper premolar | ||||||||||
Notopithecus adapinus
Ameghino 1897
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Mammalia
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Carolozittelia tapiroides n. gen., n. sp.
Ameghino 1901
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Simpson 1967 | 2 specimens | ||||||||
MACN 10666, maxilla M2-3 (lectotype), lower jaw fragments; MACN 10665, lower jaw fragments. | ||||||||||
Mammalia
- Astrapotheria
- Trigonostylopidae
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Trigonostylops wortmani
Ameghino 1897
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Trigonostylops scabellum n. sp.
Ameghino 1901
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Simpson 1967 | 1 specimen | ||||||||
synonym of Trigonostylops wortmani | ||||||||||
MACN 10657, maxilla P3-4 | ||||||||||
Mammalia
- Cingulata
- Dasypodidae
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Utaetus laxus n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Utaetus buccatus | ||||||||||
MACN 10424, two scutes. Locality record based on Simpson (1967, ref. 57943). | ||||||||||
Mammalia
- Panameriungulata
- Didolodontidae
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Enneoconus parvidens n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
synonym of Ernestokokenia nitida | ||||||||||
MACN 10726, M3 | ||||||||||
Prohyracotherium medialis n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
recombined as Archaeohyracotherium mediale | ||||||||||
MACN 10677, left upper molar | ||||||||||
Didolodus multicuspis
Ameghino 1897
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Simpson 1948 | 1 specimen | ||||||||
MACN 10728, right m3 | ||||||||||
Nephacodus latigonus n. sp.
Ameghino 1902
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Simpson 1948 | 1 specimen | ||||||||
synonym of Didolodus multicuspis | ||||||||||
MACN 10725, m2 | ||||||||||
Mammalia
- Panameriungulata
- Proterotheriidae
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Josepholeidya adunca n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10702, left upper molar | ||||||||||
Mammalia
- Panameriungulata
- Macraucheniidae
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Ernestohaeckelia acutidens n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10731, comprising a nearly complete upper molar (the lectotype) and four other molar fragments, some referable to other species | ||||||||||
Amilnedwardsia brevicula n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 12011, upper molar | ||||||||||
Victorlemoineia emarginata n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10672, nearly complete M1 and broken M2 | ||||||||||
Victorlemoineia labyrinthica n. sp.
Ameghino 1901
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Simpson 1948 | 1 specimen | ||||||||
MACN 10671, P4 and a third of M1 | ||||||||||
Anisolambda longidens n. sp.
Ameghino 1901
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Simpson 1967 | |||||||||
recombined as Victorlemoinea longidens | ||||||||||
see common names |
Geography
Country: | Argentina | State/province: | Chubut |
Coordinates: | 45.1° South, 68.4° West (view map) | ||
Paleocoordinates: | 47.6° South, 58.7° West | ||
Basis of coordinate: | based on political unit | ||
Geographic resolution: | local area |
Stratigraphy
Stratigraphy comments: Casamayoran SALMA. According to Cifelli (1985), this locality is mostly early Barrancan but partly Vacan in age.
Middle Eocene according to Woodburne et al. (2014). |
Lithology and environment
Primary lithology: | not reported |
Environment: | terrestrial indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | mesofossils |
Collection methods and comments
Reason for describing collection: | biostratigraphic analysis |
Metadata
Also known as: | west of Río Chico | ||
Database number: | 176164 | ||
Authorizer: | J. Zijlstra, P. Mannion | Enterer: | J. Zijlstra, P. Mannion |
Modifier: | M. Kouvari | Research group: | vertebrate |
Created: | 2016-01-30 17:28:47 | Last modified: | 2020-09-22 03:16:02 |
Access level: | the public | Released: | 2016-01-30 17:28:47 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
57836. | R. Cifelli. 1985. Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. American Museum Novitates 2820:1-26 [J. Zijlstra/J. Zijlstra] |
Secondary references:
10809 | ETE | S.D. Chitaley. 1949. Dadoxylon chandaensis sp. nov. from the District of Chanda,C.P. Journal of Indian Botanical Society 28:172-180 [A. Srivastava/A. Srivastava/A. Srivastava] |
58289 | E. H. Colbert. 1946. Sebecus, representative of a peculiar suborder of fossil Crocodilia from Patagonia. Bulletin of the American Museum of Natural History 87(4):221-270 [J. Zijlstra/J. Zijlstra] | |
42601 | G. G. Simpson. 1932. The supposed association of dinosaurs with mammals of Tertiary type in Patagonia. American Museum Novitates 566:1-21 [M. Uhen/M. Uhen] | |
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] | |
57943 | G. G. Simpson. 1967. The Ameghinos' localities for early Cenozoic mammals in Patagonia. Bulletin of the Museum of Comparative Zoology 136:63-76 [J. Zijlstra/J. Zijlstra] | |
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] | |
62645 | B. Vera. 2013. Acoelodus connectus Ameghino, 1901, Sinónimo de Transpithecus obtentus Ameghino, 1901, “Notopithecinae” del Eoceno de Patagonia. Ameghiniana 50(5):535-540 [P. Mannion/P. Mannion] | |
62627 | B. Vera and E. Cerdeño. 2014. Systematic revision of Antepithecus brachystephanus Ameghino, 1901, and dental eruption sequence in Eocene ‘‘notopithecines’’ (Notoungulata) from Patagonia. Geobios 47:165-181 [P. Mannion/P. Mannion] | |
10963 | G.P. Wahlman. 1992. Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region. United States Geological Survey Professional Paper 1066(O):1-123 [P. Wagner/P. Wagner/E. Ito] |