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