Aysén: Tithonian, Chile

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
Crocodyliformes indet. Hay 1930
Novas et al. 2015
"basal crocodyliforms"
    = Burkesuchus mallingrandensis n. gen., n. sp. Novas et al. 2021
Novas et al. 2021
SGO.PV 17700 - holotype; paratype (SGO.PV 17701)
Theropoda indet. (Marsh 1881)
4 specimens
SNGM 1935
    = Tetanurae indet. Gauthier 1986
Carrano et al. 2012
    = Chilesaurus diegosuarezi n. gen., n. sp. Novas et al. 2015
Novas et al. 2015
SNGM 1935 - holotype (nearly complete, articulated skeleton, approximately 1.6 m long); referred material: SNGM-1937, associated forelimbs and left tibia and fibula, and complete foot, and incomplete right distal end of tibia and fibula; SNGM-1936, nearly complete left ilium, incomplete right ilium, both pubes and ischia, and forelimbs, right astragalus and right metatarsals; SNGM-1938, both forelimbs with incomplete hands, left and right scapulocoracoids, nearly complete dorsal vertebral series and articulated ribs; SNGM-1889, right ilium; SNGM-1895, proximal end of left tibia; SNGM-1888, partial left pes, comprising articulated distal end of tibia and fibula, astragalus and calcaneum, distal tarsal IV, metatarsals II-IV and many articulated phalanges; SNGM-1901, distal end of right tibia; SNGM-1894, SNGM-1898, SNGM- 1900, SNGM-1903, incomplete and isolated dorsal vertebrae; SNGM-1887, partial left manus
Sauropoda indet. (Marsh 1878)
Salgado et al. 2015 4 specimens
SNGM-1977 (a mid or posterior dorsal vertebra), SNGM-1981 and SNGM-1982 (two mid? caudal centra) and SNGM-1980 (partial sternal plate)
Titanosauria indet. Bonaparte and Coria 1993
Novas et al. 2015 2 specimens
SNGM-1983, a distal end of a left femur; SNGM-1984, distal end of a right tibia
    = ? Titanosauriformes indet. Salgado et al. 1997
Salgado et al. 2015
Diplodocidae indet. (Marsh 1884)
Novas et al. 2015 1 specimen
SNGM-1978, middle? cervical centrum
Diplodocinae indet. (Janensch 1929)
Salgado et al. 2015 1 specimen
SNGM-1979, incomplete mid-posterior caudal vertebra
Coniferales - Podocarpaceae
Podocarpoxylon sp. Gothan 1905
unclassified
Skolithos sp. Haldemann 1840
Thalassinoides sp. Ehrenberg 1944
see common names

Geography
Country:Chile State/province:Aisén County:General Carrera
Coordinates: 46.7° South, 72.4° West (view map)
Paleocoordinates:44.9° South, 32.4° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Jurassic Epoch:Late/Upper Jurassic
Stage:Tithonian 10 m.y. bin:Jurassic 6
Key time interval:Tithonian
Age range of interval:149.20000 - 145.00000 m.y. ago
Age estimate:147 ± 1 Ma (U/Pb)
Stratigraphy
Formation:Toqui
Stratigraphic resolution:group of beds
Stratigraphy comments: U-Pb SHRIMP date of 147 ± 0.1 Ma from ignimbrite at base of measured section, just below fossiliferous layer
Lithology and environment
Primary lithology:pebbly,volcaniclastic,green sandstone
Includes fossils?Y
Lithology description: "green volcaniclastic pebbly sandstones and sandy sedimentary breccias" The succession of clastic sedimentary rocks with intercalated tuffs is 300–320 m thick. The dinosaur fossils occur in an approximately 100 m succession of alternating green volcaniclastic pebbly sandstones and sandy sedimentary breccias, with intercalations of lapilli tuffs and red ignimbrites with eroded tops The succession of clastic sedimentary rocks with intercalated tuffs is 300–320 m thick. The dinosaur fossils occur in an approximately 100 m succession of alternating green volcaniclastic pebbly sandstones and sandy sedimentary breccias, with intercalations of lapilli tuffs and red ignimbrites with eroded tops
Environment:fluvial-deltaic indet.
Glacial or sequence phase:transgressive
Geology comments: braided-river delta
Taphonomy
Modes of preservation:body,trace
Size of fossils:macrofossils
Preservation of anatomical detail:variable
Associated major elements:some
Disassociated major elements:some
Fragmentation:frequent
Spatial resolution:allochthonous
Collection methods and comments
Collection methods:surface (float),surface (in situ),field collection
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Aysen; South of Lago General Carreras; General Carrera Lake
Database number:83734
Authorizer:M. Carrano, P. Mannion Enterer:M. Carrano, P. Mannion
Modifier:P. Mannion Research group:vertebrate
Created:2008-08-28 08:02:16 Last modified:2021-07-27 11:28:04
Access level:the public Released:2008-08-28 08:02:16
Creative Commons license:CC BY
Reference information

Primary reference:
28072.ETE L. Salgado, R. de la Cruz, M. Suárez, M. S. Fernández, Z. B. Gasparini, S. Palma-Heldt, and M. Fanning. 2008. First Late Jurassic dinosaur bones from Chile. Journal of Vertebrate Paleontology 28(2):529-534 [M. Carrano/M. Carrano/M. Uhen]

Secondary references:

41617 M. T. Carrano, R. B. J. Benson, and S. D. Sampson. 2012. The phylogeny of Tetanurae (Dinosauria: Theropoda). Journal of Systematic Palaeontology 10(2):211-300 [M. Carrano/M. Carrano]
76299 N. R. Chimento. 2015. Anatomía pélvica de un nuevo dinosaurio tetanuro (Dinosauria, Theropoda) del Jurásico Tardio de Chile [Pelvic anatomy of a new tetanuran dinosaur (Dinosauria, Theropoda) from the Late Jurassic of Chile]. XXIX Jornadas Argentinas de Paleontología de Vertebrados. Resúmenes. Ameghiniana 52(4 (suppl.)):12 [M. Carrano/M. Carrano/M. Carrano]
76279 N. R. Chimento, F. L. Agnolin, and F. E. Novas. 2014. Anatomía astragalar de un nuevo dinosaurio carnívoro (Dinosauria, Theropoda) del Jurásico Superior de Chile [Astragalar anatomy of a new carnivorous dinosaur (Dinosauria, Theropoda) from the Upper Jurassic of Chile]. XXVIII Jornadas Argentina de Paleontología de Vertebrados. Resúmenes. Ameghiniana 51(6 (suppl.)):8 [M. Carrano/M. Carrano/M. Carrano]
77478 F. E. Novas, F. L. Agnolin, G. L. Lio, S. Rozadilla, M. Suárez, R. Cruz, I. S. Carvalho, D. Rubilar-Rogers, and M. P. Isasi. 2021. New transitional fossil from late Jurassic of Chile sheds light on the origin of modern crocodiles. Scientific Reports 11:14960 [P. Mannion/P. Mannion]
55192 F. E. Novas, L. Salgado, M. Suárez, F. L. Agnolín, M. D. Ezcurra, N. R. Chimento, R. Cruz, M. P. Isasi, A. O. Vargas and D. Rubilar-Rogers. 2015. An enigmatic plant-eating theropod from the Late Jurassic period of Chile. Nature 522(7556):331-334 [P. Mannion/J. Tennant/M. Carrano]
55571 D. Rubilar-Rogers, R. A. Otero, R. E. Yury-Yáñez, A. O. Vargas, and C. S. Gutstein. 2012. An overview of the dinosaur fossil record from Chile. Journal of South American Earth Sciences 37:242-255 [M. Carrano/M. Carrano]
76537 D. Rubilar-Rogers and A. O. Vargas. 2008. Vertebrados terrestres del Mesozoico en Chile: estado del conocimiento y perspectivas [Mesozoic terrestrial vertebrates in Chile: state of knowledge and perspectives]. In A. Rubilar R., D. Rubilar-R., & C. S. Gutstein (eds.), I Simposio—Paleontología en Chile. Libro de Actas 83-86 [M. Carrano/M. Carrano]
56018 L. Salgado, F. E. Novas, M. Suarez, R. Cruz, M. Isasi, D. Rubilar-Rogers, and A. O. Vargas. 2015. Late Jurassic sauropods in Chilean Patagonia. Ameghiniana 52(4):418-429 [P. Mannion/P. Mannion/O. Alfaro]