Henry's Fork (Eocene of the United States)

Where: Sweetwater County, Wyoming (41.0° N, 110.2° W: paleocoordinates 43.9° N, 99.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bridger Formation, Middle Eocene (48.6 - 37.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by O. C. Marsh in 1871; reposited in the YPM

Primary reference: O. C. Marsh. 1872. Notice of some new Tertiary and post-Tertiary birds. The American Journal of Science and Arts, series 3 4(19-24):256-262 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 81455: authorized by Mark Uhen, entered by Mark Uhen on 24.06.2008, edited by Matthew Carrano, Roger Benson, Philip Mannion, Terri Cleary, Evangelos Vlachos and Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Baenidae
"Chisternon undatum" = Chisternon undatum2, "Baena undata" = Chisternon undatum4, Baena arenosa2
"Chisternon undatum" = Chisternon undatum2 Leidy 1871 turtle
An isolated vertebra, from Henry's Fork of Green River, looks as if it might be the first sacral of Chisternon undatum.
"Baena undata" = Chisternon undatum4 Leidy 1871 turtle
Baena arenosa2 Leidy 1870 turtle
A third and less perfect specimen of the shell of Baena arenosa, consisting of the central portion of the carapace and nearly the corresponding portion with the anterior extremity of the plastron, was found by Dr. Carter on Henry's Fork of Green River, and presented by him to the Academy of Natural Sciences. A fourth specimen referable to Baeiia arenosa consists of a small portion of the carapace with a large portion of the plastron, from Henry's Fork of Green River, found by Dr. Carter, and presented by him to the Academy of Natural Sciences of Philadelphia.
 Testudines -
Hadrianus allabiatus4 Cope 1871 turtle
two ungual phalanges
 Testudines - Panemydidae
"Emys wyomingensis" = Chrysemys wyomingensis4
"Emys wyomingensis" = Chrysemys wyomingensis4 Leidy 1869 pond turtle
Aves
 Charadriiformes - Scolopacidae
"Aletornis gracilis n. sp." = Philohela gracilis
"Aletornis gracilis n. sp." = Philohela gracilis Marsh 1872 American woodcock
 Piciformes - Picidae
Uintornis lucaris n. gen. n. sp.
Uintornis lucaris n. gen. n. sp. Marsh 1872 woodpecker
 Gruiformes - Gruidae
Grus marshi n. sp.5, Aletornis pernix n. sp.
Grus marshi n. sp.5 Shufeldt 1915 crane
Aletornis pernix n. sp. Marsh 1872 crane
 Gruiformes - Rallidae
"Aletornis venustus n. sp." = Fulicaletornis venustus
"Aletornis venustus n. sp." = Fulicaletornis venustus Marsh 1872 rail
 Pelecaniformes - Ardeidae
Eoceornis ardetta n. gen. n. sp.5
Eoceornis ardetta n. gen. n. sp.5 Shufeldt 1915 heron
 Lithornithiformes - Lithornithidae
Lithornithidae indet.1 Houde 1988 bird
YPM 883 (poorly preserved distal end of a tibiotarsus) - collected by Hunting and Chew in 1873
Reptilia
 Crocodylia - Crocodylidae
"Crocodilus aptus" = Crocodylus aptus4
"Crocodilus aptus" = Crocodylus aptus4 Leidy 1869 crocodile
 Squamata - Teiidae
Iguanavus exilis n. gen. n. sp.3
Iguanavus exilis n. gen. n. sp.3 Marsh 1872 squamates
YUM 1057 (holotype anterior caudal vertebra)
 Squamata -
"Thinosaurus crassus n. sp." = Saniwa ensidens3, "Thinosaurus agilis n. sp." = Saniwa ensidens3
"Thinosaurus crassus n. sp." = Saniwa ensidens3 Leidy 1870 squamates
(AKA Thinosaurus crassus) YPM 610 (holotype), five dorsal vertebrae, a few fragmentary parts of vertebrae, shaft of a right humerus - "horizon C or higher"
"Thinosaurus agilis n. sp." = Saniwa ensidens3 Leidy 1870 squamates
(AKA Thinosaurus agilis) YPM 609 (holotype), dentary with one tooth, four vertebrae, distal femur, distal phalanx - "horizon C or higher"
 Squamata - Anguidae
Oreosaurus microdus n. sp.3 Marsh 1872 squamates
YPM 1056 (holotype), median part of dentary, one head scute, fragment of vertebra
Oreosaurus lentus n. sp.3 Marsh 1872 squamates
YPM 1052 (holotype), two caudal vertebrae
Oreosaurus minutus n. sp.3 Marsh 1872 squamates
YPM 1058 (holotype), anterior of dentary with 1 tooth
Oreosaurus gracilis n. sp.3 Marsh 1872 squamates
YPM 1055 (holotype), anterior half of right dentary
Glyptosaurus sphenodon n. sp.3 Marsh 1872 squamates
YPM 1051 (holotype), small portion of right maxilla with two complete teeth - "horizon C or higher"
 Squamata -
Tinosaurus lepidus n. sp.3 Marsh 1872 squamates