Los Alamitos vertebrates, middle section: Late Campanian - Early Maastrichtian, Argentina
collected by J. F. Bonaparte, J. E. Powell 1982-1983
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Batoidei
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Batoidei indet.
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Cione 1987 | 12 elements | ||||||||
MACN-RN 148, twelve vertebrae | ||||||||||
Reptilia
- Sphenodontidae
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Sphenodontidae indet.
Cope 1871
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Apesteguía 2005 | 2 specimens | ||||||||
MACN Pv RN1099c, 1100 | ||||||||||
Kawasphenodon expectatus n. gen., n. sp.
Apesteguía 2005
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Apesteguía 2005 | 3 specimens | ||||||||
MACN Pv RN1098, 1099a-b | ||||||||||
Reptilia
- Hadrosauridae
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Kritosaurus sp.
Brown 1910
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20 individuals | |||||||||
MACN-RN 142-146, 826, 977-995, 997-998 | ||||||||||
= Kritosaurus australis n. sp.
Bonaparte et al. 1984
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Bonaparte et al. 1984 | |||||||||
MACN-RN 2 | ||||||||||
Reptilia
- Theropoda
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Aves indet.
(Linnaeus 1758)
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Agnolin and Martinelli 2009 | 5 specimens | ||||||||
MACN PV RN 1103 (distal end of indeterminate pedal phalanx), MACN PV RN 1104 (distal end of pedal phalanx, probably II-2), MACN PV RN 1105 (pedal ungual of digit I) and MACN PV RN 1106 (manual ungual of digit I); MACN PV RN 1107 (pedal phalanx 1 of right digit II without its proximal end) | ||||||||||
cf. Neornithes indet.
(Gadow 1893)
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Agnolin and Martinelli 2009 | 1 specimen | ||||||||
MACN PV RN 1115 (distal end of right tarsometatarsus without metatarsal IV and distal trochlea of metatarsal II) | ||||||||||
Ornithothoraces indet.
Chiappe and Calvo 1994
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Chiappe 1996 | 1 specimen | ||||||||
MACN-RN 976 (partial cervical vertebra) | ||||||||||
Alamitornis minutus n. gen., n. sp.
Agnolin and Martinelli 2009
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Agnolin and Martinelli 2009 | 3 specimens | ||||||||
MACN PV RN 1108 - holotype (proximal third of a left humerus) and referred material: MACN PV RN 1109 (five proximal extremes of right humeri of different individuals) and MACN PV RN 1110 (distal half of a left femur of a juvenile specimen) | ||||||||||
Ornithurae indet.
(Haeckel 1866)
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Agnolin and Martinelli 2009 | 3 specimens | ||||||||
MACN PV RN 1111 (distal end of left tibiotarsus, without distal condyles), MACN PV RN 1112 (distal end of left tibiotarsus with damaged medial condyle) and MACN PV RN 1113 (distal end of left tibiotarsus with complete distal condyles) | ||||||||||
cf. Hesperornithiformes indet.
Fürbringer 1888
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Agnolin and Martinelli 2009 | 1 specimen | ||||||||
MACN PV RN 1114 (distal end of left tibia) | ||||||||||
Reptilia
- Titanosauridae
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Aeolosaurus ? rionegrinus
Powell 1987
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Powell 1987 | 1 individual | ||||||||
MACN-RN 147 | ||||||||||
= Titanosauridae indet.
Lydekker 1885
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Juárez Valieri and Calvo 2011 | |||||||||
Titanosauridae indet.
Lydekker 1885
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Powell 1987 | 5 specimens | ||||||||
MACN-RN 1102, 1128 | ||||||||||
Reptilia
- Testudines
- Chelidae
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Chelidae informal indet. D
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de Broin 1987 | 33 specimens | ||||||||
The abundance is estimated, should be checked. MACN-RN 43-64, 77-100, 102-140 | ||||||||||
Chelidae informal indet. C
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de Broin 1987 | 33 specimens | ||||||||
The abundance is estimated, should be checked. MACN-RN 43-64, 77-100, 102-140 | ||||||||||
= cf. Yaminuechelys sp.
de la Fuente et al. 2001
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Maniel 2015 | |||||||||
MACN-RN-43. Placa pygal plate. MACN-RN-45. 9th and 10th peripheral plates. MACN-RN-46.Posterior peripheral plate. MACN-RN-50. anterior peripheral plate. MACN-RN-63. posterior peripheral plate. MACN-RN-78. posterior peripheral plate. MACN-RN-86. 10th right peripheral plate. MACN-RN-88. posterior peripheral plate MACN-RN-123. neural fragment. MACN-RN-913. anterior peripheral plate. MACN-RN-914. Peripheral plate. MACN-RN-915. peripheral plate MACN-RN-926. xiphiplastron. MACN-RN927. xiphiplastron | ||||||||||
Chelidae informal indet. B
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de Broin 1987 | 33 specimens | ||||||||
The abundance is estimated, should be checked. MACN-RN 43-64, 77-100, 102-140 | ||||||||||
= aff. Emydura sp.
Bonaparte 1836
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Maniel 2015 | |||||||||
MACN-RN-907 and MACN-RN-908, two biconvex vertebra | ||||||||||
Reptilia
- Testudines
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Chelidae informal indet. A
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de Broin 1987 | 1 specimen | ||||||||
= Palaeophrynops patagonicus n. gen., n. sp.
Lapparent de Broin and de la Fuente 2001
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Lapparent de Broin and de la Fuente 2001 | |||||||||
MACN-RN 906. Anterior part of a carapace, morphology mostly seen in imprint, with the anterior border (partial peripherals 1 to 5, left and right), the nuchal, pleurals 1 and 2, neural 1 and 2 (partly); right lateral fragment with lateral part of pleurals 4 to 6 and peripherals 7 and 8; partial plastral anterior lobe, remains of 5 cervicals (only the 4th sufficiently preserved); left humerus and femur. Discovered by Dr Bonaparte. Lapparent de Broin & Fuente 2001 do not say which of the Los ALamitos chelid types P. patagonicus pertains to so I ahve arbitrarily placed in the 'indet A' | ||||||||||
Reptilia
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Niolamia sp.
Ameghino 1899
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de Broin 1987 | 20 specimens | ||||||||
MACN-RN 36-42, 65-76, 101 | ||||||||||
= cf. Niolamia sp.
Ameghino 1899
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de Broin and de la Fuente 1993 | |||||||||
additionally a fragment of nuchal (MACN RN 918), a short cervical plus long fragment of pleural (?) (MACN RN 910) | ||||||||||
= Meiolaniformes indet.
Sterli and de la Fuente 2013
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Sterli et al. 2013 | |||||||||
The revision of the MACN collection allows us to corroborate the assignment of these specimens to Meiolaniformes by Broin (1987) and Broin and de la Fuente (1993) | ||||||||||
Reptilia
- Madtsoiidae
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Madtsoiinae indet.
Hoffstetter 1961
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Pol et al. 2023 | 26 specimens | ||||||||
MACN-RN 201-202, 204-227 | ||||||||||
Patagoniophis parvus n. gen., n. sp.
Albino 1986
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Albino 1986 | 3 specimens | ||||||||
MACN-RN 33-35 | ||||||||||
Rionegrophis madtsoioides n. gen., n. sp.
Albino 1986
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Albino 1986 | 1 specimen | ||||||||
MACN-RN 32 | ||||||||||
Alamitophis argentinus n. gen., n. sp.
Albino 1986
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Albino 1986 | 6 specimens | ||||||||
MACN-RN 27 (holotype) 27–31, 203 | ||||||||||
Mammalia
- Sudamericidae
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Gondwanatherium patagonicum n. gen., n. sp.
Bonaparte 1986
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Bonaparte 1986 | 18 specimens | ||||||||
MACN-RN 22 (holotype) 22-26, 228, 703-705, 970, 1024-1031 | ||||||||||
Mammalia
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Ferugliotherium sp.
Bonaparte 1986
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Kielan-Jaworowska et al. 2004 | 2 specimens | ||||||||
MACN-RN 249 (anterior upper premolar), and framgnetary left dentary | ||||||||||
Ferugliotherium windhauseni n. gen., n. sp.
Bonaparte 1986
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Bonaparte 1986 | 9 specimens | ||||||||
MACN-RN 20 (holotype worn right m2) and specimen referred by Krause et al 1992: MACN-RN 701A, B (partial left i1s), 701C (partial i1), 253 (partial left m1), 702A–D (partial I2s), 248-251, MACN-RN 975; incisors and premolars only tentatively referred | ||||||||||
Paratheria indet.
Thomas 1887
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Bonaparte 1987 | |||||||||
Mammalia
- Meridiolestida
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Meridiolestida indet.
Rougier et al. 2011
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Gaetano et al. 2013 | 1 specimen | ||||||||
MACNPV-RN241, complete right upper premolariform | ||||||||||
Mammalia
- Meridiolestida
- Mesungulatidae
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Mesungulatidae indet.
Bonaparte 1986
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Gaetano et al. 2013 | 5 specimens | ||||||||
MACN-RN 239, complete left P1; MACN-RN 240, complete left p1, MACN-RN 1135-1137 | ||||||||||
Mesungulatum houssayi n. gen., n. sp.
Bonaparte and Soria 1985
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Bonaparte 1987 | 17 specimens | ||||||||
MACN-RN 1, 3-12, 141, 181-184, 244 | ||||||||||
Mammalia
- Meridiolestida
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Austrotriconodon mckennai n. gen., n. sp.
Bonaparte 1986
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Bonaparte 1986 | 6 specimens | ||||||||
MACN-RN 21 (holotype) 234-238 | ||||||||||
Mammalia
- Dryolestidae
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Groebertherium indet.
Bonaparte 1986
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Pol et al. 2023 | 16 specimens | ||||||||
MACN-RN 185-200 | ||||||||||
Groebertherium novasi n. gen., n. sp.
Bonaparte 1986
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Bonaparte 1986 | 2 specimens | ||||||||
MACN-RN 18-19 | ||||||||||
Groebertherium stipanicici n. gen., n. sp.
Bonaparte 1986
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Bonaparte 1986 | 5 specimens | ||||||||
MACN-RN 13-17 | ||||||||||
Mammalia
- Dryolestida
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Paraungulatum rectangularis n. gen., n. sp.
Bonaparte 2002
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Bonaparte 2002 | 3 specimens | ||||||||
MACN-RN 180 (left upper molar), 1141 | ||||||||||
Mammalia
- Dryolestida
- Casamiquelidae
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Alamitherium bishopi n. gen., n. sp.
Bonaparte 2002
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Bonaparte 2002 | 3 specimens | ||||||||
MACN-RN 1034-1036 | ||||||||||
Rougietherium tricuspes n. gen., n. sp.
Bonaparte 2002
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Bonaparte 2002 | 1 specimen | ||||||||
MACN-RN 162 | ||||||||||
Amphibia
- Temnospondyli
- Calyptocephalellidae
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Leptodactylidae indet.
Stirton 1953
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Báez 1987 | 8 specimens | ||||||||
= Calyptocephalellidae indet.
Reig 1960
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Suazo Lara and Gómez 2022 | |||||||||
MACN-RN 160, maxillae, squamosal, humeri, ilium | ||||||||||
Amphibia
- Temnospondyli
- Pipidae
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cf. Xenopus sp.
Wagler 1827
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Báez 1987 | 8 elements | ||||||||
= Kuruleufenia xenopoides
Gómez 2016
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Suazo Lara and Gómez 2022 | |||||||||
MACN-RN 159, fragment of skull, presacral, ilium, humeri, sphenethmoid, sacrourostyle, pelvis | ||||||||||
Dipnoi
- Ceratodontidae
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Ameghinoceratodus iheringi
(Ameghino 1906)
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Apesteguia et al. 2007 | 1 specimen | ||||||||
MACN PV RN157C, right lower tooth plate | ||||||||||
= Atlantoceratodus patagonicus
Agnolín 2010
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Agnolín 2010 | |||||||||
Ceratodus iheringi
Ameghino 1906
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Cione 1987 | 118 elements | ||||||||
MACN-RN 157-158, dental plates | ||||||||||
Ptychoceratodus wichmanni n. sp.
Apesteguía and Agnolin 2007
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Apesteguia et al. 2007 | 1 specimen | ||||||||
MACN PV RN157A, left upper tooth plate | ||||||||||
= Metaceratodus wichmanni n. sp.
Apesteguía and Agnolin 2007
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Cione and Gouiric-Cavalli 2012 | |||||||||
Dipnoi
- Ptychoceratodontidae
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Ptychoceratodus cionei n. sp.
Apesteguia et al. 2007
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Apesteguia et al. 2007 | 2 specimens | ||||||||
MACN PV RN157A and 157B, two lower tooth plates | ||||||||||
Actinopteri
- Siluriformes
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Siluriformes indet.
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Cione 1987 | 75 elements | ||||||||
MACN-RN 154, 1139-1140, spines | ||||||||||
Actinopteri
- Siluriformes
- Diplomystidae
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cf. Diplomystidae indet.
Eigenman 1890
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Cione 1987 | 17 elements | ||||||||
MACN-RN 152, eight proximal fragments, eight central fragments and one pectoral spine | ||||||||||
Actinopteri
- Siluriformes
- Ariidae
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cf. Ariidae indet.
Berg 1958
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Cione 1987 | 3 elements | ||||||||
MACN-RN 153, three pectoral spines fragments | ||||||||||
Actinopteri
- Perciformes
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Percoidei indet.
(Bleeker 1859)
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Cione 1987 | 1 element | ||||||||
MACN-RN 155, tooth | ||||||||||
Actinopteri
- Spariformes
- Sparidae
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Sparidae indet.
(Cuvier 1817)
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Cione 1987 | 7 elements | ||||||||
"Lepidotes or Sparidae" | ||||||||||
Actinopteri
- Lepisosteiformes
- Lepisosteidae
|
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Lepisosteidae indet.
Cuvier 1825
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Cione 1987 | 207 elements | ||||||||
MACN-RN 150, 156, six vertebrae, skulls fragments and 200 dermal scales | ||||||||||
cf. Atractosteus sp.
Rafinesque 1820
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Cione 1987 | 3 elements | ||||||||
MACN-RN 149, three teeth | ||||||||||
see common names |
Geography
Country: | Argentina | State/province: | Río Negro |
Coordinates: | 42.1° South, 66.3° West (view map) | ||
Paleocoordinates: | 45.0° South, 52.3° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | outcrop |
Time
Period: | Cretaceous | Epoch: | Late Cretaceous |
Stage: | Campanian - Maastrichtian | 10 m.y. bin: | Cretaceous 7 - Cretaceous 8 |
Key time interval: | Late Campanian - Early Maastrichtian | ||
Age range of interval: | 83.6 - 66 m.y. ago |
Stratigraphy
Formation: | Los Alamitos | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: middle section of formation includes vertebrate fossils distributed over about 30 meters of section
Mammals: Middle section of Los Alamitos Formation - green-coloured bed just below the concretionary top of the Cerrito del Mamifero, Alamitian provincial age (Campanian sensu lato) |
Lithology and environment
Primary lithology: | planar lamination,bioturbation,concretionary,yellow siltstone |
Secondary lithology: | bioturbation,intraclastic sandstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: "Pelitic facies: includes dominant massive, laminated or rippled (rare) siltstones and claystones, with yellowish (lower part of the sequences) to reddish, orange, brown and purple hues (upper part), and massive sandstones. This rocks show typical paquidermis solution pattern which allow its recognition in outcrops. The non-calcareous pelites contains (lower half) almost all the vertebrate remains" | |
Environment: | lacustrine - large |
Geology comments: dominant environment lacustrine, more brackish than fresh (clay flocculation in pelites). waters were oxygenated; lake permanent and shallow.
The paleoenvironment according to Andreis (1987; and personnal communication) is that of a lacustrine environment mixed with shallow marine sediments, as indicated by the presnce of glauconite in some levels of the sequence. |
Taphonomy
Modes of preservation: | body,trace |
Degree of concentration: | dispersed |
Size of fossils: | macrofossils,mesofossils |
Preservation of anatomical detail: | good |
Articulated whole bodies: | none |
Associated major elements: | some |
Disassociated major elements: | many |
Disassociated minor elements: | many |
Fragmentation: | frequent |
Temporal resolution: | time-averaged |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | selective quarrying,surface (float),surface (in situ),mechanical,field collection | ||
Reason for describing collection: | general faunal/floral analysis | ||
Collectors: | J. F. Bonaparte, J. E. Powell | Collection dates: | 1982-1983 |
Metadata
Also known as: | Los Alamitos vertebrates, middle section - green-coloured bed (mammals), Cerro Cuadrado, Arroyo Verde | ||
Database number: | 45087 | ||
Authorizer: | M. Carrano, R. Benson, P. Mannion, E. Vlachos | Enterer: | M. Carrano, R. Benson, F. Aspromonte, P. Mannion, J. Tennant, E. Vlachos |
Modifier: | F. Aspromonte | Research group: | vertebrate |
Collections that are a subset of this one: | |||
Created: | 2004-10-04 11:03:49 | Last modified: | 2023-08-28 14:55:42 |
Access level: | the public | Released: | 2004-10-04 11:03:49 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
13925. | ETE | J. F. Bonaparte. 1984. Nuevas pruebas de la conexion fisica entre Sudamerica y Norteamerica en el Cretácico Tardio (Campaniano) [New evidences for the physical connection between South and North America in the Late Cretaceous (Campanian)]. Actas del III Congreso Argentino de Paleontologia y Bioestratigrafia 1:141-149 [M. Carrano/M. Carrano/M. Carrano] |
Secondary references:
86689 | F. Agnolín. 2010. A new species of the genus Atlantoceratodus (Dipnoiformes: Ceratodontoidei) from the Uppermost Cretaceous of Patagonia and a brief overview of fossil dipnoans from the Cretaceous and Paleogene of South America. Brazilian Geographical Journal 1(2):162-210 [E. Vlachos/F. Aspromonte] | |
37643 | F. L. Agnolin and A. G. Martinelli. 2009. Fossil birds from the Late Cretaceous Los Alamitos Formation, Río Negro Province, Argentina. Journal of South American Earth Sciences 27:42-49 [P. Mannion/P. Mannion/M. Carrano] | |
17612 | A. M. Albino. 1986. Nuevos Boidae Madtsoiinae en el Cretácico Tardio de Patagonia (Formación Los Alamitos, Río Negro, Argentina) [New Madtsoiinae Boinae in the Late Cretaceous of Patagonia (Los Alamitos Formation, Río Negro, Argentina)]. Actas del IV Congreso Argentino de Paleontología y Bioestratigrafía, Mendoza 2:15-21 [J. Head/J. Head/M. Carrano] | |
11736 | ETE | A. M. Albino. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part V—the ophidians. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):141-146 [M. Carrano/M. Carrano/M. Carrano] |
11733 | ETE | R. R. Andreis. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part I—stratigraphy and paleontology. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):103-110 [M. Carrano/M. Carrano/M. Carrano] |
34191 | ETE | S. Apesteguía. 2005. A Late Campanian sphenodontid (Reptilia, Diapsida) from northern Patagonia. Comptes Rendus Palevol 4:663-669 [M. Carrano/M. Carrano] |
72409 | S. Apesteguia, F. L. Agnolin, and K. Claeson. 2007. Review of Cretaceous dipnoans from Argentina (Sarcopterygii: Dipnoi) with descriptions of new species. Revista del Museo Argentino de Ciencias Naturales nueva serie 9(1):27-40 [G. Lloyd/G. Lloyd/F. Aspromonte] | |
11734 | ETE | A. M. Báez. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part III—anurans. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):121-130 [M. Carrano/M. Carrano/F. Aspromonte] |
30646 | ETE | J. F. Bonaparte. 1984. Jurassic and Cretaceous terrestrial vertebrates of South America. National Geographic Society Research Reports (1975) 16:115-125 [M. Carrano/M. Carrano] |
9952 | J. F. Bonaparte. 1986. Sobre Mesungulatum houusayi y nuevos mamíferos Cretácicos de Patagonia, Argentina [On Mesungulatum houssayi and new Cretaceous mammals from Patagonia, Argentina]. Actas del IV Congreso Argentino de Paleontología y Biostratigrafía 2:48-61 [J. Alroy/J. Wertheim/M. Carrano] | |
13928 | ETE | J. F. Bonaparte. 1986. A new and unusual Late Cretaceous mammal from Patagonia. Journal of Vertebrate Paleontology 6(3):264-270 [M. Carrano/M. Carrano/M. Carrano] |
11737 | ETE | J. F. Bonaparte. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part VIII—the mammals. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):163-169 [M. Carrano/M. Carrano/M. Carrano] |
38756 | J. F. Bonaparte. 1990. New Late Cretaceous mammals from the Los Alamitos Formation, Northern Patagonia. National Geographic Research 6(1):63-93 [R. Benson/R. Benson] | |
16547 | ETE | J. F. Bonaparte. 1996. Cretaceous tetrapods of Argentina. Münchner Geowissenschaften Abhandlungen 30:73-130 [M. Carrano/M. Carrano/M. Carrano] |
70619 | J. F. Bonaparte. 2002. New Dryolestida (Theria) from the Late Cretaceous of Los Alamitos, Argentina, and paleogeographical comments. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen 224(3):339-371 [M. Carrano/M. Carrano/P. Wagner] | |
13926 | ETE | J. F. Bonaparte, M. R. Franchi, J. E. Powell and E. Sepulveda. 1984. La Formación Los Alamitos (Campaniano-Maastrichtiano) del sudeste de Rio Negro, con descripcion de Kritosaurus australis n. sp. (Hadrosauridae). Significado paleogeografico de los vertebrados [The Los Alamitos Formation (Campanian-Maastrichtian) from the southeast of Rio Negro, with a description of Kritosaurus australis n. sp. (Hadrosauridae). Paleogeographic significance of the vertebrates]. Revista de la Asociación Geología Argentina 39(3-4):284-299 [M. Carrano/M. Carrano/M. Carrano] |
11732 | ETE | J. F. Bonaparte and G. Rougier. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part VII—the hadrosaurs. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):155-161 [M. Carrano/M. Carrano/M. Carrano] |
37378 | C. R. A. Candeiro. 2010. Record of the genus Aeolosaurus (Sauropoda, Titanosauria) in the Late Cretaceous of South America: paleogeographic implications. Estudios Geológicos 66(2):243-253 [M. Carrano/M. Carrano] | |
12947 | ETE | L. M. Chiappe. 1996. Early avian evolution on the southern hemisphere: the fossil record of birds in the Mesozoic of Gondwana. Memoirs of the Queensland Museum 39(3):533-554 [M. Carrano/M. Carrano/M. Carrano] |
48178 | L. M. Chiappe. 2007. Aves. In Z. B. Gasparini, L. Sangado & R. A. Coria (eds.), Patagonian Mesozoic Reptiles 257-270 [M. Carrano/M. Carrano] | |
11738 | ETE | A. L. Cione. 1987. The Late Cretaceous fauna of Los Alamitos, Patagonia, Argentina part II—the fishes. Revista del Museo Argentina de Ciencias Naturales "Bernardino Rivadavia" e Instituto Nacional de Investigacion de las Ciencias Naturales: Paleontología 3(3):111-120 [M. Carrano/M. Carrano/M. Carrano] |
86688 | A. L. Cione and S. Gouiric-Cavalli. 2012. Metaceratodus kaopen comb. nov. and M. wichmanni comb. nov., two Late Cretaceous South American species of an austral lungfish genus (Dipnoi). Alcheringa 36(2):203-216 [E. Vlachos/F. Aspromonte] | |
75729 | P. Cruzado-Caballero, L. S. Filippi, A. H. Méndez, A. C. Garrido, and I. Díaz-Martínez. 2018. First ornithopod remains from the Bajo de la Carpa Formation (Santonian, Upper Cretaceous), northern Patagonia, Argentina. Cretaceous Research 83:182-193 [M. Carrano/M. Carrano/M. Carrano] | |
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