Cañadon Hondo, Bird Clay locality (Eocene of Argentina)

Where: Chubut, Argentina (45.4° S, 67.7° W: paleocoordinates 47.8° S, 57.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Casamayoran mammal zone, Sarmiento Formation, Middle Eocene (48.6 - 37.2 Ma)

• Bottom of bed III in measured section CF.

•This is a single horizon ("green bentonite with Sebecus, birds, etc.") within the Sarmiento Formation at Cañadon Hondo, and distinct from Rio Chico remains at the same locality (PBDB 14205). Casamayoran SALMA of Middle Eocene age

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; green claystone and white tuff

• Green bentonite

Size class: macrofossils

Reposited in the AMNH

Primary reference: G. G. Simpson. 1937. New reptiles from the Eocene of South America. American Museum Novitates 927:1-3 [J. Alroy/J. Wertheim/J. Wertheim]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39295: authorized by John Alroy, entered by Jill Wertheim on 25.05.2004, edited by John Alroy, Jelle Zijlstra and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudinata - Meiolaniidae
"Crossochelys corniger n. gen. n. sp." = Niolamia argentina6
"Crossochelys corniger n. gen. n. sp." = Niolamia argentina6 Ameghino 1899 turtle
AMNH 3161
Aves
  -
Aves indet.5 Linnaeus 1758 bird
species a
 Anseriformes - Presbyornithidae
Telmabates antiquus n. gen. n. sp.5, Telmabates howardae n. sp.3
Telmabates antiquus n. gen. n. sp.5 Howard 1955 waterfowl
Telmabates howardae n. sp.3 Cracraft 1970 waterfowl
Reptilia
 Loricata - Sebecidae
Sebecus icaeorhinus n. gen. n. sp.
Sebecus icaeorhinus n. gen. n. sp. Simpson 1937 crocodilian
AMNH 3160 - holotype (disarticulated skull and mandible)
 Squamata - Boidae
Waincophis australis n. gen. n. sp.1
Waincophis australis n. gen. n. sp.1 Albino 1987 boa
MACN-CH 1008 - holotype
Mammalia
 Notoungulata - Archaeopithecidae
Archaeopithecus rogeri9 Ameghino 1897 notoungulate
AMNH FM 28534, MACN-A 10824a and MMdP-M 727
 Notoungulata - Isotemnidae
Thomashuxleya externa8 Ameghino 1901 notoungulate
AMNH 28677, mandible p2-m3
? Pleurostylodon similis2 Ameghino 1901 notoungulate
 Marsupialia - Derorhynchidae
"Microbiotherium gutierrezi n. sp." = Coona gutierrezi4, Coona pattersoni n. gen. n. sp.7
"Microbiotherium gutierrezi n. sp." = Coona gutierrezi4 Del Corro 1977 marsupial
Coona pattersoni n. gen. n. sp.7 Simpson 1948 marsupial
AMNH 28907