CTA-27 (Eocene of Peru)

Also known as CTA 27; Contamana

Where: Loreto, Peru (7.3° S, 74.9° W: paleocoordinates 9.9° S, 66.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Gran Barranca Member (Pozo Formation), Middle Eocene (48.6 - 37.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, muddy claystone

• 30-cm-thick lens of light-grey clay with irregular limestone concretions at the top of the Yahuarango Formation

Size classes: mesofossils, microfossils

Preservation: original phosphate

Collection methods: Museum repository: Museum of Natural Hisotory in Lima, Peru

Primary reference: P. O. Antoine, L. Marivaux, D. A. Croft, G. Billet, M. Ganerod, C. Jaramillo, T. Martin, M. Orliac, J. Tejada, A. J. Altamirano, F. Duranthon, G. Fanjat, S. Rousse and R. Salas-Gismondi. 2011. Middle Eocene rodents from Peruvian Amazonia reveal the pattern and timing of caviomorph origins and biogeography. Proceedings of The Royal Society B 279:1319-1326 [C. Jaramillo/A. Cardenas ]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 144474: authorized by Carlos Jaramillo, entered by Andrés Cardenas on 08.05.2013, edited by Jelle Zijlstra and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Malacostraca
 Decapoda - Trichodactylidae
Trichodactylidae indet.1 Milne-Edwards 1853 crab
Ostracoda
 Podocopida - Ilyocyprididae
 Podocopida -
Bivalvia
 Unionida - Hyriidae
? Hyriidae indet.1 Swainson 1840 clam
shell prints
Gastropoda
  -
Gastropoda indet.1 Cuvier 1797 snail
planispiraled inner cast
 Sorbeoconcha - Pachychilidae
Pachychilidae indet.1 Troschel 1857 snail
inner cast
Chondrichthyes
 Myliobatiformes - Dasyatidae
Potamotrygon ucayalensis n. sp.1 whiptail stingray
Gnathostomata
  -
Actinopterygii indet.1 ray-finned fish
Actinopteri
 Teleostei -
 Heterognathi - Anostomidae
cf. Leporinus sp.1 Lundberg 1997
teeth
Osteichthyes
 Salientia -
Anura indet.1 frog
"leptodactyloid" postcrania
 Salientia - Pipidae
Pipidae indet.1 Gray 1825 clawed frog
postcrania
Reptilia
 Testudines -
"Chelonia indet." = Testudines1
"Chelonia indet." = Testudines1 Batsch 1788 turtle
 Testudines - Panchelidae
? Chelidae indet.1 sideneck turtle
 Loricata - Sebecidae
cf. Sebecus sp.1 Stirton 1953 crocodilian
many teeth and fragments
 Crocodylia - Alligatoridae
Caimaninae indet.1 Brochu 1999 crocodilian
teeth & fragments
? Balanerodus sp.1 Langston 1965 crocodilian
tooth fragments
 Crocodylia -
Gavialoidea indet.1 Brochu 1997 crocodilian
several teeth and fragments
 Squamata -
? Platynota indet.1 Baur 1890 lizard
vertebra
Booidea indet.1 Gray 1825 snake
vertebra
Anilioidea indet.1 snake
vertebra
Mammalia
 Notoungulata -
Toxodontia indet.1 Ameghino 1887 notoungulate
incisors
 Notoungulata - Archaeohyracidae
Archaeohyracidae indet.1 Ameghino 1897 notoungulate
"Eohyrax/Pseudhyrax/Punahyrax", several teeth
 Notoungulata - Interatheriidae
Interatheriidae indet.1 Ameghino 1887 notoungulate
several teeth
Interatheriinae indet.1 Simpson 1945 notoungulate
Antepithecus/Notopithecus/Transpithecus
 Rodentia -
Eobranisamys javierpradoi n. sp.2 Boivin et al. 2017 caviomorph
Canaanimys maquiensis n. gen. n. sp. Antoine et al. 2011 caviomorph
MUSM 1890 - holotype
cf. Eoespina sp. Frailey and Campbell 2004 caviomorph
MUSM 1912, 1913 and 2802
Cachiyacuy contamanensis n. gen. n. sp. Antoine et al. 2011 caviomorph
MUSM 1871 - holotype
Cachiyacuy kummeli n. sp. Antoine et al. 2011 caviomorph
MUSM 1882 - type
 Astrapotheria - Trigonostylopidae
? Trigonostylops sp.1 Ameghino 1897 placental
left p3
 Tribosphenida -
cf. Griphodon sp.1 Anthony 1924 placental
small-sized tooth fragments
 Chiroptera - Phyllostomidae
"Phyllostomatidae indet." = Phyllostomidae1
"Phyllostomatidae indet." = Phyllostomidae1 Gray 1825 leaf-nosed bat
fragmentary lower tooth
 Chiroptera -
Microchiroptera indet.1 Dobson 1875 bat
fragmentary lower tooth
 Chiroptera - Molossidae
Molossidae indet.1 Gervais 1856 free-tailed bat
lower teeth
 Cingulata -
Cingulata indet.1 edentate
keeled scute
 Xenarthra - Dasypodidae
"Stegosimpsonia cf. chubutana" = Pseudostegotherium chubutanum1
"Stegosimpsonia cf. chubutana" = Pseudostegotherium chubutanum1 Ameghino 1902 armadillo
one perforated scute
 Eutheria -
Litopterna indet.1 Ameghino 1889 eutherian
"fragmentary tooth"
 Sparassodonta - Borhyaenidae
Borhyaenidae indet.1 Savage 1951 metatherian
"very small"
 Polydolopimorphia -
Wamradolops sp.1 Goin and Candela 2004 metatherian
 Theriiformes - Herpetotheriidae
Rumiodon sp.1 Goin and Candela 2004 marsupial
 Marsupialia -
Didelphimorphia "indet. 2"1 Gill 1872 marsupial
Didelphimorphia "indet. 3"1 Gill 1872 marsupial
 Paucituberculata - Palaeothentidae
Sasawatsu sp.1 Goin and Candela 2004 marsupial
 Paucituberculata - Caenolestidae
cf. Perulestes "sp. 1"1 Goin and Candela 2004 marsupial
small
cf. Perulestes "sp. 2"1 Goin and Candela 2004 marsupial
large
 Allotheria - Sudamericidae
? Sudamericidae indet.1 Scillato-Yané and Pascual 1984 mammal
"probable sudamericid", two fragmentary teeth
Scabratriporites
  -
Scabratriporites verticilatus
as Scabratriporites "verticilatus"
Foveomonocolpites
  -
Foveomonocolpites sp. Wijmstra 1971
Retipollenites
  -
Retipollenites sp. González-Guzmán 1967
Psilastephanoporites
  -
Psilastephanoporites exinatus
as Psilastephanoporites "exinatus"
Psilastephanoporites sp. Regali et al. 1974
Retitricolpites
  -
Retitricolpites equatocolumellatus
as Retitricolpites "equatocolumellatus"
Retitricolpites sp. Van der Hammen 1956
Retitricolpites simplex González-Guzmán 1967
Psilatricolpites
  -
Psilatricolpites oblatus
as Psilatricolpites "oblatus"
Psilatricolpites plicatus
as Psilatricolpites "plicatus"
Psilatricolpites polaris
as Psilatricolpites "polaris"
Psilatricolpites sp. Van der Hammen and Wijmstra 1964
Foveotricolpites
  -
Loranthacites
  -
Loranthacites pelusoides
as Loranthacites "pelusoides"
Psilamonocolpites
  -
Psilamonocolpites sp. Van der Hammen and Garcia de Mutis 1966
Retistephanocolpites
  -
Retistephanocolpites muriperforatus
as Retistephanocolpites "muriperforatus"
Retistephanocolpites sp. Leidelmeyer 1966
Retibrevitricolporites
  -
Psilastephanocolpites
  -
Psilastephanocolpites longicolpus
as Psilastephanocolpites "longicolpus"
Proxapertites
  -
Retitrescolpites
  -
Retitrescolpites magnus Jaramillo and Dilcher 2001
Pinopsida
 Pinales - Podocarpaceae
Podocarpidites sp. Cookson 1947
Trichotomosulcites biconicus
as Trichotomosulcites "biconicus"
 Pinales - Araucariaceae
Retimonocolpites
  -
Tetraporopollenites
  -
Pteridopsida
  -
? Polypodiaceoisporites fossulatus Jaramillo and Dilcher 2001
Echinatisporis sp. Krutzsch 1959
Laevigatosporites sp. Ibrahim 1933
 Polypodiales -
Polypodiisporites sp. Potonie 1931
Psilatriletes
  -
Psilatriletes sp. Potonié 1956
Lycopsida
  -
Foveotriletes sp. Van der Hammen and Potonié 1956
  - Lycopodiaceae
Retitriletes sp. Pierce 1961
Magnoliopsida
  -
Striatopollis sp. Krutzsch 1959
Striatopollis catatumbus Gonzalez-Guzman 1967
Dicotyledonae
 Polygalales - Rosidae
Perisyncolporites pokornyi Germeraad et al. 1968
  -
Stephanocolpites sp. Van der Hammen 1954
Magnoliopsida
  -
Rhoipites prolatus
as Rhoipites "prolatus"
Psilatricolporites pseudomarginatus
as Psilatricolporites "pseudomarginatus"
Gemmamonocolpites sp. Van der Hammen and Garcia 1966
Retitricolporites colpotransversalis
as Retitricolporites "colpotransversalis"
Retitricolporites porolalongatus
as Retitricolporites "porolalongatus"
Retitricolporites pseudorhoipites
as Retitricolporites "pseudorhoipites"
Retitricolporites sp. Van der Hammen and Wymstra 1964
 Gentianales - Apocynaceae
Cricotriporites macroporus Jaramillo and Dilcher 2001
 Fabales - Leguminosae
Polyadopollenites sp. Pflug and Thomson 1953
 Fabales - Fabaceae
Margocolporites vanwijhei Germeraad et al. 1968
Spirosyncolpites spiralis González-Guzmán 1967
 Myrtales - Onagraceae
Corsinipollenites psilatus Jaramillo and Dilcher 2001
 Malvales -
Echiperiporites sp. Anzotegui and Cuadrado 1996
Echiperiporites cf. estelae Germeraad et al. 1968
Echiperiporites estelae Germeraad et al. 1968
 Malvales - Bombacaceae
 Solanales - Convolvulaceae
Perfotricolpites digitatus González-Guzmán 1967
  -
Tricolpites crassoexinatus
as Tricolpites "crassoexinatus"
Foveotricolporites porololongatus
as Foveotricolporites "porololongatus"
Striatricolporites porolalongatus
as Striatricolporites "porolalongatus"
Striatricolporites reticulatus
as Striatricolporites "reticulatus"
Striatricolporites sp. Leidelmeyer 1966
Striatricolporites digitatus Jaramillo and Dilcher 2001
Scabratricolpites
  -
Scabratricolpites sp. Van der Hammen 1956
Monocolpites
  -
Monocolpites sp. Van der Hammen 1954
Psilaperiporites
  -
Psilaperiporites diminutus
as Psilaperiporites "diminutus"
Psilaperiporites intensus
as Psilaperiporites "intensus"
Tetracolporopollenites
  -
Tetracolporopollenites perforatus
as Tetracolporopollenites "perforatus"
Pinidae
 Cupressales - Pinidae
Lingulodinium
  -
Striatricolpites
  -
Striatricolpites pseudoreticulatus
as Striatricolpites "pseudoreticulatus"
Striatricolpites transversalis
as Striatricolpites "transversalis"
Striatriletes
  -
Striatriletes radiatus
as Striatriletes "radiatus"