Junction (TMM 41443) (Eocene of the United States)

Also known as DUPLICATE REF 3667 or 3852

Where: Brewster County, Texas (29.2° N, 103.2° W: paleocoordinates 31.5° N, 93.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Lower Member (Devil's Graveyard Formation), Early/Lower Uintan (46.2 - 40.4 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the TMM

Primary reference: J. A. Wilson. 1986. Stratigraphic Occurrence and Correlation of Early Tertiary Vertebrate Faunas, Trans-Pecos Texas: Agua Fria-Green Valley Areas. Journal of Vertebrate Paleontology 6(4):350-373 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 16586: authorized by John Alroy, entered by John Alroy on 26.07.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

• this is Junction sensu stricto
underlies Whistler Squat
said by Prothero 1996b to be Bridgerian; Figure 2 of Wilson indicates that it is roughly at the level of the Alamo Creek Basalt because both are above the "basal Tertiary conglomerate" and below the "variegated bentonites"; the ACB is dated at 46 Ma (KA), and a tuff just below it at 46.0 +/- 1.0 Ma (KA) and 46.29 +/- 0.05 Ma (AA); latter date seems best
the following taxa are from Junction, exact locality unknown: Scenopagus priscus Centetodon pulcher ? Entomolestes sp. Nyctitherium velox cf. Pantolestes sp.
Reptilia
 Crocodylia - Planocraniidae
"Pristichampsus cf. vorax" = Boverisuchus vorax2
"Pristichampsus cf. vorax" = Boverisuchus vorax2 Troxell 1925 crocodilian
Mammalia
 Theriamorpha - Stylinodontidae
Stylinodon sp.1 Marsh 1874 taeniodont
 Condylarthra - Hyopsodontidae
Hyopsodus paulus4 Leidy 1870 condylarth
 Perissodactyla - Hyrachyidae
? Hyrachyus cf. modestus8 Leidy 1870 odd-toed ungulate
 Perissodactyla - Hyracodontidae
? Triplopus cf. implicatus8 Cope 1873 odd-toed ungulate
 Perissodactyla - Brontotheriidae
Brontotheriidae indet.6 Marsh 1873 brontothere
 Artiodactyla - Protoceratidae
Leptoreodon pusillus7 Golz 1976 protoceratid
(excluding "questionably referred" specimen)
 Artiodactyla - Dichobunidae
Dichobunidae indet. Gill 1872 even-toed ungulate
 Rodentia - Ischyromyidae
Thisbemys corrugatus1 Wood 1959 rodent
 Rodentia - Sciuravidae
Pauromys texensis3 Walton 1993 rodent
"Group 2" and "sp. 4" also present
Prolapsus junctionis9 Wood 1973 rodent
 Rodentia - Cylindrodontidae
Pareumys boskeyi1 Wood 1973 rodent
 Primates - Omomyidae
Omomys carteri4 Leidy 1869 tarsier
Ourayia uintensis4 Osborn 1895 tarsier
Ourayia uintensis5 Osborn 1895 tarsier
includes "Homacodon cf. vagans" of West 1982 according to Stucky 1998, but Stucky means to refer to specimen of "Helohyus sp." figured and described by West and identity of "H. cf. vagans" specimen is unclear: Walsh 2000
 Primates - Microsyopidae
Microsyops annectens4 Marsh 1872 primate
 Theriamorpha - Herpetotheriidae
Herpetotherium marsupium4 Troxell 1923 marsupial
Peratherium cf. comstocki1 Cope 1884 marsupial