Rattlesnake Mountain (vertebrates, general) (Cretaceous to of the United States)

Also known as L&W locality 47, Dawson Creek, Big Bend

Where: Brewster County, Texas (29.3° N, 103.6° W: paleocoordinates 35.8° N, 77.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Aguja Formation, Middle Campanian to Middle Campanian (83.5 - 70.6 Ma)

• "Rattlesnake Beds"

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; concretionary, green claystone and limestone

• "Fossils are usually preserved in the clays and limestones. In the sandstones they usually occur as moulds."

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by J. Udden in pre-1904; reposited in the FMNH

Collection methods: surface (in situ),

• Supposedly sent to Univ. of Chicago Walker Museum, but not currently there nor in Field Museum (Davies, 1983).

Primary reference: J. A. Udden. 1907. A sketch of the geology of the Chisos country, Brewster County, Texas. Bulletin of the University of Texas 93:1-101 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 150883: authorized by Matthew Carrano, entered by Matthew Carrano on 17.09.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

• IDs of vertebrates by S. Williston
Show authors, comments, and common names
Gastropoda
 Architaenioglossa - Viviparidae
Viviparus aff. raynoldsanus
Reptilia
 Testudines -
Testudines indet.
Testudines indet. Batsch 1788 turtle
several types of freshwater turtles
 Crocodylia -
? Deinosuchus sp.1
? Deinosuchus sp.1 Holland 1909 crocodilian
large form, "new to science"
 Ornithischia - Ceratopsidae
? Ceratopsidae indet.
? Ceratopsidae indet. Marsh 1888 ceratopsid
distal tibia
 Ornithischia - Hadrosauridae
Hadrosauridae indet.2
Hadrosauridae indet.2 Cope 1869 hadrosaurid
limb bones and vertebrae
 Theropoda - Tyrannosauridae
? Tyrannosauridae indet.1
? Tyrannosauridae indet.1 Osborn 1906 tyrannosaurid
teeth
Angiospermae
  -
Angiospermae indet.
Angiospermae indet.
tree trunks
unclassified
  -
Gymnospermophyta indet.
Gymnospermophyta indet. Cleal 1994
tree trunks
1Tweet and Santucci 2018; 2Weishampel and Weishampel 1983