Hogback South D (Cretaceous of the United States)

Also known as UALP 75137

Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 43.6° N, 79.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Fruitland Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; medium-grained, carbonaceous siltstone and sandstone

• fossiliferous siltstone, light tan, poorly sorted, with a few lignite fragments. The locality is the surface of a round knob, underlain by a white concretionary sandstone, about 4.5 m thick that overlies a thick black carbonaceous, ralatively continuous siltstone.

Size class: macrofossils

Collection methods: These data, reported by Armstrong-Ziegler, were actually collected by another group. The specifics of fossil prep for this collection are not reported.

Primary reference: J. G. Armstrong-Ziegler. 1978. An aniliid snake and associated vertebrates from the Campanian of New Mexico. Journal of Paleontology 52(2):480-483 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36543: authorized by John Alroy, entered by Erin Leckey on 03.02.2004, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Actinopteri
 Acanthomorphata - Sciaenidae
Platacodon nanus Marsh 1889
Osteichthyes
 Proteida - Batrachosauroididae
"Prodesmodon ? copei" = Prodesmodon copei, "Cuttysarkus mcnallyi" = Prodesmodon copei, Opisthotriton kayi
"Prodesmodon ? copei" = Prodesmodon copei Estes 1964 tetrapod
premaxillary, maxillary and dentary fragments, some vertebra
"Cuttysarkus mcnallyi" = Prodesmodon copei Estes 1964 tetrapod
dentaries (whole and fragments)
Opisthotriton kayi Auffenberg 1961 tetrapod
vertebral fragments, fragment of right dentary
 Salientia - Pelobatidae
? Eopelobates sp. Parker 1929 spadefoot toad
fragmentary posterior portion of a left maxilla
Reptilia
 Squamata - Anguidae
Anguidae indet. Gray 1825 lizard
osteoscutes, 4 complete and 50 fragments
cf. Gerrhonotus sp. Wiegmann 1828 alligator lizard
fragment of dentaries
 Squamata - Chamopsiidae
Leptochamops denticulatus Gilmore 1928 lizard
dentary and maxillary fragments