Barrancas del Rio Parana (Miocene of Argentina)

Also known as Entreriana

Where: Entre Rios, Argentina (33.7° S, 59.3° W: paleocoordinates 33.8° S, 56.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Entre Rios Formation, Tortonian (11.6 - 7.2 Ma)

• Predominant faunal elements indicate a Huayquerian age, but there are rare forms that might be reworked from older deposits of Santacrucian and/or Chasicoan age, and a few others which are representatives of Montehermosan age;

•"Fossiliferous beds in this area have received numerous names....The name "Entrerriense" or "Formacion Entrerriana" has been applied to the somewhat younger marine facies... fluviatile facies has been generally included under the name "Mesopotamiense"...."

•Huayquerian is now known as late Miocene

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; siltstone and sandstone

• "...Predominantly clastic [sedimentation] (silts, sands, and loess) which predominate during the Pliocene and Plesitocene of the Pampean region..."

Size class: macrofossils

Primary reference: L. G. Marshall. 1977. First Pliocene record of the water opposum, Chironectes minimus (Didelphidae, Marsupialia). Journal of Mammalogy 58(3):434-436 [J. Alroy/J. Wertheim/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13626: authorized by John Alroy, entered by Jill Wertheim on 16.04.2002, edited by Mark Uhen, Philip Mannion, Jelle Zijlstra, Evangelos Vlachos, John Alroy and Juan Carrillo

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Platemys robusta n. sp.2
MPBA uncat. (holotype), a costal fragment (Ambrosetti 1893, fig. 1). All material appears to be lost (de la Fuente 1988).
Thecostraca
 Balanomorpha - Balanidae
Malacostraca
 Decapoda - Nephropidae
Homarus meridionalis4 clawed lobster
Bivalvia
 Mytilida - Mytilidae
Mytilus trigonus4, "Lithodomus ostricola" = Lithophaga4
"Lithodomus ostricola" = Lithophaga4 mussel
 Ostreida - Ostreidae
"Ostrea alvarezii" = Cubitostrea alvarezii4 d'Orbigny 1842 oyster
"Ostrea patagonica" = Crassostrea patagonica4 d'Orbigny 1842 oyster
 Pectinida - Limidae
"Ostrea excavata" = Acesta excavata4
"Ostrea excavata" = Acesta excavata4 Fabricius 1780 file clam
 Pectinida - Anomiidae
 Pectinida - Pectinoidae
"Pecten darwinianus" = Amusium darwinianum4, "Pecten paranensis" = Aequipecten paranensis4
"Pecten darwinianus" = Amusium darwinianum4 d'Orbigny 1846 scallop
"Pecten paranensis" = Aequipecten paranensis4 d'Orbigny 1842 scallop
 Arcida - Arcidae
"Arca bonplandiana" = Potiarca bonplandiana4 d'Orbigny 1842 ark
 Carditida - Astartidae
Coelopis striata4 clam
As "Coleopsis striata"
 Carditida - Condylocardiidae
"Cardium pygmaeum" = Carditella semen4
"Cardium pygmaeum" = Carditella semen4 Reeve 1843 clam
 Cardiida - Cardiidae
 Cardiida - Veneridae
Venus elongata4, Venus meridionalis4, "Lucinopsis concentricum" = Mysia4, Cytherea munsteri4
Venus elongata4 venus clam
Venus meridionalis4 venus clam
"Lucinopsis concentricum" = Mysia4 venus clam
Cytherea munsteri4 venus clam
Gastropoda
 Pectinibranchia -
 Sorbeoconcha - Littorinidae
Littorina gigantea4 periwinkle
 Neogastropoda - Volutidae
"Voluta alta" = Adelomelon alta4
"Voluta alta" = Adelomelon alta4 Sowerby 1846 volute
 Epitonioidea - Epitoniidae
Scalaria minuta4 wentletrap
 Cerithioidea - Cerithiidae
Cerithium americanum4 cerith snail
 Trochoidea - Turbinidae
"Margarita striata" = Margarites striatus4
"Margarita striata" = Margarites striatus4 Leach 1819 snail
 Trochoidea - Phasianellidae
Reptilia
 Crocodylia - Crocodylidae
Leptorramphus entrerrianus n. gen. n. sp.10
Leptorramphus entrerrianus n. gen. n. sp.10 Ambrosetti 1890 crocodile
Type (partial skull)
 Crocodylia - Gavialidae
"Rhamphostomopsis neogaeus n. gen. n. sp." = Rhamphostomopsis neogaeus10, "Rhamphostomopsis intermedius n. sp." = Rhamphostomopsis neogaeus10
"Rhamphostomopsis neogaeus n. gen. n. sp." = Rhamphostomopsis neogaeus10 Rusconi 1933 crocodilian
MLP 26-413; 68-IX-V-1; 68-IX-V-2 - hypodigm (partial skull)
"Rhamphostomopsis intermedius n. sp." = Rhamphostomopsis neogaeus10 Rusconi 1933 crocodilian
MACN 6122 - type
 Crocodylia - Alligatoridae
"Crocodilus paranensis n. sp." = Caiman paranensis10, "Jacaretinga praecursor n. sp." = Caiman praecursor10, "Proalligator australis" = Caiman australis1
"Crocodilus paranensis n. sp." = Caiman paranensis10 Scalabrini 1887 caiman
Type (skull and jaw fragments, isolated vertebrae and limb bones)
"Jacaretinga praecursor n. sp." = Caiman praecursor10 Rusconi 1933 caiman
Type (anterior third of right mandible)
"Proalligator australis" = Caiman australis1 Bravard 1858 caiman
 Testudinata -
Emys paranensis n. sp.5 Burmeister 1885 turtle
MPBA uncat. (syntype series), unfigured shell fragments (type material lost, de la Fuente 1988)
 Testudines -
Testudines indet.1 Batsch 1788 turtle
 Testudines - Geoemydidae
Morenia sp.1 Gray 1870 Eyed turtles
 Testudines - Chelidae
Platemys entreriana n. sp.2 Ambrosetti 1893 sideneck turtle
MPBA uncat. (syntype series?), shell fragments (Ambrosetti 1893, fig. 1). All material appears to be lost (de la Fuente 1988).
Platemys bergii n. sp.2 Ambrosetti 1893 sideneck turtle
MPBA uncat. (syntype series?), shell fragments (Ambrosetti 1893, fig. 1). All material appears to be lost (de la Fuente 1988).
Platemys holmbergii n. sp.2 Ambrosetti 1893 sideneck turtle
MPBA uncat. (holotype), a costal I (Ambrosetti 1893, fig. 1). All material appears to be lost (de la Fuente 1988).
Platemys torrentium n. sp.5 Burmeister 1885 sideneck turtle
MPBA uncat. (holotype), an unfigured, now-lost shell fragment consisting of three costals (de la Fuente 1988).
Platemys mesopotamica n. sp.2 Ambrosetti 1893 sideneck turtle
MPBA uncat. (holotype), a costal I (Ambrosetti 1893, fig. 1). All material appears to be lost (de la Fuente 1988).
Mammalia
 Mammalia -
 Notoungulata - Haplodontheriidae
"Toxodon paranensis" = Haplodontherium wildei4
"Toxodon paranensis" = Haplodontherium wildei4 Ameghino 1885 notoungulate
 Sirenia - Trichechidae
Ribodon limbatus n. gen. n. sp.3
Ribodon limbatus n. gen. n. sp.3 Ameghino 1883 manatee
 Carnivora - Otariidae
Otaria fischeri n. sp.6 Gervais and Ameghino 1880 sea lion
 Panameriungulata - Proterotheriidae
Proterotherium americanum1 Bravard 1858 placental
 Panameriungulata - Macraucheniidae
 Cetacea - Pontoporiidae
"Delphinus rectifrons n. sp." = Pontistes rectifrons4
"Delphinus rectifrons n. sp." = Pontistes rectifrons4 Bravard 1858 toothed whale
 Cetacea - Balaenidae
Balaena dubia4 Bravard 1858 right whale
 Didelphimorphia - Didelphidae
Chironectes sp.7 Illiger 1811 water opossum
 Sparassodonta -
Stylocynus paranensis n. gen. n. sp.8, "Notictis ortizi n. gen. n. sp." = Notictis ortizii9
Stylocynus paranensis n. gen. n. sp.8 Mercerat 1917 metatherian
MLP 11-94, dentary m3-4, holotype; MLP 41-XII-13-1112, dentary p1-m1; MACN 5893, maxilla M2; MACN 13203, maxilla P2, M1-2
"Notictis ortizi n. gen. n. sp." = Notictis ortizii9 Ameghino 1889 metatherian
MACN 3996, dentary p1-m4, type of both _Notictis ortizi_ and _Didelphys curvidens_
Actinopteri
 Perciformes - Sparidae
Sparus antiquus4 perch-like fish
 Spariformes - Sparidae
 Pleuronectiformes - Pleuronectidae
Solea sp.4 Gouan 1770 flatfish
 Siluriformes - Siluridae
Chondrichthyes
 Squaliformes - Squalidae
Squalus eocenus4 dogfish shark
Squalus obliquidens4 dogfish shark
 Lamniformes - Lamnidae
Lamna unicuspidens4 mackerel shark
Lamna amplibasidens4 mackerel shark
Lamna serridens4 mackerel shark
 Lamniformes - Mitsukurinidae
"Lamna elegans" = Striatolamia macrota4
"Lamna elegans" = Striatolamia macrota4 Agassiz 1838 goblin shark
 Myliobatiformes - Myliobatidae
Myliobatis americanus4 eagle ray
[entered as Myliobates americanus]
Asteroidea
 Forcipulatida - Asteriidae