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

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