CTA-32 (Oligocene of Peru)

Also known as Contamana; CTA 32

Where: Loreto, Peru (7.3° S, 74.9° W: paleocoordinates 8.9° S, 69.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: base Member (Chambira Formation), Late/Upper Oligocene (28.4 - 23.0 Ma)

• 30 m above the base of the Chambira Formation

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; blue claystone and pebbly conglomerate

• bluish lacustrine clays topping a conglomerate with centimetric pebbles of fluvial origin

Size class: mesofossils

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 176130: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 29.01.2016, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Malacostraca
 Decapoda - Trichodactylidae
Trichodactylidae indet. Milne-Edwards 1853 crab
Aves
  -
Aves indet. Linnaeus 1758 bird
claw
Reptilia
 Crocodylia -
Gavialoidea indet. crocodilian
"several teeth & fragments"
? Balanerodus sp. Langston 1965 crocodilian
"two tooth fragments"
 Crocodylia - Alligatoridae
Caimaninae indet. Brochu 1999 crocodilian
"teeth & fragments"
 Loricata - Sebecidae
cf. Sebecus sp. Stirton 1953 crocodilian
"numerous tooth fragments"
 Testudines -
Pleurodira "indet. A" Cope 1865 sideneck turtle
"plate fragments"
Pleurodira "indet. B" Cope 1865 sideneck turtle
"shell fragments"
 Serpentes -
Serpentes indet. snake
"non-booid (vertebrae)"
 Squamata -
Booidea indet. Gray 1825 snake
"vertebrae"
Colubroidea indet. Oppel 1811 snake
"vertebra"
Mammalia
 Cingulata - Dasypodidae
Tolypeutinae indet. Gray 1865 armadillo
scutes
 Cingulata - Pampatheriidae
Pampatheriidae indet. Paula Couto 1954 edentate
scutes
 Cingulata - Pachyarmatheriidae
cf. Neoglyptatelus sp. Carlini et al. 1997 edentate
scute
 Astrapotheria - Astrapotheriidae
Astrapotheriidae indet. Ameghino 1887 placental
"enamel fragments – vertical decussating"
 Placentalia -
Notoungulata indet. Roth 1903 notoungulate
"enamel fragments"
 Chiroptera -
? Rhinolophoidea indet. bat
"upper molar plus upper and lower canines"
Vespertilionoidea indet. bat
"small (fragmentary lower tooth)"
 Chiroptera - Emballonuridae
Emballonuridae indet. Dobson 1875 sac-winged bat
"lower teeth"
 Placentalia -
? Litopterna indet. placental
"enamel fragments"
 Rodentia -
Caviomorpha indet. caviomorph
MUSM 2867–2868
Ucayalimys crassidens n. gen. n. sp. Boivin et al. 2017 caviomorph
"Chinchilloidea/Cavioidea?, new genus and new species (1 M2)"
Octodontoidea indet. Waterhouse 1839 caviomorph
MUSM 2869
Loretomys minutus n. gen. n. sp. Boivin et al. 2017 caviomorph
upper molars
 Rodentia - Echimyidae
Adelphomyinae indet. Patterson and Pascual 1968 spiny rat
MUSM 2856
 Rodentia -
aff. Eosallamys sp. Frailey and Campbell 2004 caviomorph
teeth
 Rodentia - Erethizontidae
Palaeosteiromys amazonensis n. gen. n. sp. Boivin et al. 2017 porcupine
teeth
 Rodentia -
Chambiramys shipiborum n. sp. Boivin et al. 2017 caviomorph
"Family indet., new genus and new species (11 teeth)"
 Primates -
Anthropoidea indet. monkey
"small (1 pollical phalanx)"
 Theriamorpha - Herpetotheriidae
? Herpetotheriidae indet. marsupial
"large (?M1)"
 Marsupialia -
Microbiotheria indet. Ameghino 1899 marsupial
"lower molar fragments"
 Paucituberculata - Palaeothentidae
? Palaeothentidae indet. Sinclair 1906 marsupial
lower molar
 Paucituberculata - Abderitidae
Abderites sp. Ameghino 1887 marsupial
left M2
cf. Abderites indet. Ameghino 1887 marsupial
left M2
Amphibia
 Salientia -
Anura indet. frog
"non-Pipidae (maxilla fgts + postcranial elements)"
Gnathostomata
  -
Actinopterygii indet. ray-finned fish
"isolated teeth and spines"
Actinopteri
 Cichliformes - Cichlidae
Cichlidae indet. Heckel 1840 cichlid
"maxilla/dentary"
 Siluriformes - Pimelodidae
Pimelodidae indet. Eigenmann and Eigenmann 1918 catfish
spines
 Siluriformes - Loricariidae
Loricariidae indet. Gill 1872 catfish
spines
 Teleostei -
 Characiformes - Anostomidae
Leporinus sp. Lundberg 1997
ca. 520 teeth
 Characiformes - Cynodontidae
cf. Hydrolycus sp. Lundberg 1997
ca. 100 teeth
 Characiformes - Erythrinidae
Chondrichthyes
 Myliobatiformes - Potamotrygonidae
Potamotrygonidae indet. stingray
teeth