CTA-32: Late Oligocene, Peru

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Spermatophyta indet.
"fossil wood"
Malacostraca - Decapoda - Trichodactylidae
Trichodactylidae indet. Milne-Edwards 1853
unclassified
cf. Astyanax sp.
Serrasalminae informal pacu-like
ca. 300 teeth
Serrasalminae informal piranha-like
ca. 300 teeth
Chondrichthyes - Myliobatiformes - Potamotrygonidae
Potamotrygonidae indet.
2 elements
teeth
Mammalia - Panameriungulata
? Litopterna indet. Ameghino 1889
"enamel fragments"
Mammalia - Primates
Anthropoidea indet. Mivart 1864
1 element
"small (1 pollical phalanx)"
Mammalia - Rodentia
Caviomorpha indet. (Wood and Patterson 1955)
Boivin et al. 2017
MUSM 2867–2868
Octodontoidea indet. Waterhouse 1839
Boivin et al. 2017
MUSM 2869
cf. Eosallamys sp. Frailey and Campbell 2004
7 elements
teeth
    = aff. Eosallamys sp. Frailey and Campbell 2004
Boivin et al. 2017
MUSM 2858-2860 and 2575
Octodontoidea informal n. sp. 1
2 elements
upper molars
    = Loretomys minutus n. gen., n. sp. Boivin et al. 2017
Boivin et al. 2017
MUSM 2854 - holotype; hypodigm: MUSM 2855
Mammalia - Rodentia - Echimyidae
Adelphomyinae indet. Patterson and Pascual 1968
1 element
MUSM 2856
Mammalia - Rodentia
Caviomorpha informal n. sp. 3
11 elements
"Family indet., new genus and new species (11 teeth)"
    = Chambiramys shipiborum n. sp. Boivin et al. 2017
Boivin et al. 2017
MUSM 2849 - type; hypodigm: MUSM 2843–2853
Mammalia - Rodentia - Erethizontidae
Erethizontidae informal n. sp. 2
8 elements
teeth
    = Palaeosteiromys amazonensis n. gen., n. sp. Boivin et al. 2017
Boivin et al. 2017
MUSM 2865 - holotype; referred material: MUSM 2861-2864 and 2866
Mammalia - Rodentia
Caviomorpha informal n. sp. 4
1 element
"Chinchilloidea/Cavioidea?, new genus and new species (1 M2)"
    = Ucayalimys crassidens n. gen., n. sp. Boivin et al. 2017
Boivin et al. 2017
MUSM 2857 - holotype
Mammalia - Chiroptera - Emballonuridae
Emballonuridae indet. Dobson 1875
2 elements
"lower teeth"
Mammalia - Chiroptera
Vespertilionoidea indet.
1 element
"small (fragmentary lower tooth)"
? Rhinolophoidea indet.
"upper molar plus upper and lower canines"
Mammalia - Cingulata - Dasypodidae
Tolypeutinae indet. Gray 1865
2 elements
scutes
Mammalia - Cingulata - Pachyarmatheriidae
cf. Neoglyptatelus sp. Carlini et al. 1997
1 element
scute
Mammalia - Cingulata - Pampatheriidae
Pampatheriidae indet. Paula Couto 1954
2 elements
scutes
Mammalia - Astrapotheria - Astrapotheriidae
Astrapotheriidae indet. Ameghino 1887
"enamel fragments – vertical decussating"
Mammalia - Notoungulata
Notoungulata indet. Roth 1903
"enamel fragments"
Mammalia - Paucituberculata - Abderitidae
Abderites sp. Ameghino 1887
1 element
left M2
cf. Abderites indet. Ameghino 1887
1 element
left M2
Mammalia - Paucituberculata - Palaeothentidae
? Palaeothentidae indet. Sinclair 1906
1 element
lower molar
Mammalia - Herpetotheriidae
? Herpetotheriidae indet. Trouessart 1879
1 element
"large (?M1)"
Mammalia - Microbiotheria
Microbiotheria indet. Ameghino 1899
2 fragments
"lower molar fragments"
Reptilia - Sebecidae
cf. Sebecus sp. Stirton 1953
"numerous tooth fragments"
Reptilia
? Balanerodus sp. Langston 1965
2 fragments
"two tooth fragments"
Caimaninae indet. Brochu 1999
"teeth & fragments"
Gavialoidea indet. Brochu 1997
"several teeth & fragments"
Reptilia - Theropoda
Aves indet. Linnaeus 1758
1 element
claw
Reptilia - Serpentes
Serpentes indet. Linnaeus 1758
"non-booid (vertebrae)"
Reptilia
Colubroidea indet. Oppel 1811
1 element
"vertebra"
Booidea indet. Gray 1825
"vertebrae"
Reptilia - Testudines
Pleurodira informal indet. A
"plate fragments"
Pleurodira informal indet. B
"shell fragments"
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
"non-Pipidae (maxilla fgts + postcranial elements)"
Actinopterygii
Actinopterygii indet. Cope 1887
"isolated teeth and spines"
Actinopteri - Cichliformes - Cichlidae
Cichlidae indet. Heckel 1840
"maxilla/dentary"
Actinopteri - Characiformes
Characiformes informal hook-like teeth
Characiformes informal pad-like teeth
Actinopteri - Characiformes - Anostomidae
Leporinus sp. Lundberg 1997
ca. 520 teeth
Actinopteri - Characiformes - Cynodontidae
cf. Hydrolycus sp. Lundberg 1997
ca. 100 teeth
Actinopteri - Characiformes - Erythrinidae
? Erythrinidae indet.
Actinopteri - Siluriformes - Loricariidae
Loricariidae indet. Gill 1872
spines
Actinopteri - Siluriformes - Pimelodidae
Pimelodidae indet. Eigenmann and Eigenmann 1918
spines
see common names

Geography
Country:Peru State/province:Loreto
Coordinates: 7.3° South, 74.9° West (view map)
Paleocoordinates:8.9° South, 69.4° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period: Paleogene Epoch: Oligocene
Stage: Chattian 10 m.y. bin: Cenozoic 4
Key time interval: Late Oligocene
Age range of interval: 27.82 - 23.03 m.y. ago
Stratigraphy
Formation:Chambira Member:base
Stratigraphic resolution:bed
Stratigraphy comments: 30 m above the base of the Chambira Formation
Lithology and environment
Primary lithology:blue claystone
Secondary lithology:pebbly conglomerate
Includes fossils?Y
Lithology description: bluish lacustrine clays topping a conglomerate with centimetric pebbles of fluvial origin
Environment:fluvial-lacustrine indet.
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Also known as:Contamana; CTA 32
Database number:176130
Authorizer:J. Zijlstra, P. Mannion Enterer:J. Zijlstra, P. Mannion
Modifier:P. Mannion Research group:vertebrate
Created:2016-01-29 23:27:14 Last modified:2017-07-03 04:38:17
Access level:the public Released:2016-01-29 23:27:14
Creative Commons license:CC BY
Reference information

Primary reference:
57830. P. Antoine, M. A. Abello, S. Adnet, A. J. A. Sierra, P. Baby, G. Billet, M. Boivin, Y. Calderón, A. Candela, J. Chabain, and F. Corfu. 2016. A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru. Gondwana Research 31:30-59 [J. Zijlstra/J. Zijlstra/P. Wagner]

Secondary references:

62623 M. Boivin, L. Marivaux, A. M. Candela, M. J. Orliac, F. Pujos, R. Salas-Gismondi, J. V. Tejada-Lara and P.-O. Antoine. 2017. Late Oligocene caviomorph rodents from Contamana, Peruvian Amazonia. Papers in Palaeontology 3(1):69-109 [P. Mannion/P. Mannion]