Lot 3264, Heygood Canyon (Permian of the United States)

Where: Colorado (41.0° N, 105.2° W: paleocoordinates 11.3° N, 29.1° W)

When: Falcon Member (Lykins Formation), Roadian (272.3 - 268.8 Ma)

• Hagadorn et al. 2016 note that this is the Falcon member.

• member-level stratigraphic resolution

Environment/lithology: marine; fine-grained, brown, silty sandstone

• The matrix is a compound of fine sand and clay with more or less lime, the color being a rather light brownish gray

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: G. H. Girty. 1912. On some invertebrate fossils from the Lykins formation of eastern Colorado. Annals of the New York Academy of Sciences 22:1-8 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 233343: authorized by Pete Wagner, entered by Pete Wagner on 04.02.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Myalinida - Myalinidae
"Myalina perattenuata" = Septimyalina perattenuata, Myalina wyomingensis
"Myalina perattenuata" = Septimyalina perattenuata Meek and Hayden 1858 clam
Myalina wyomingensis Lea 1853 clam
 Cardiidia - Sanguinolitidae
Alula squamulifera
Alula squamulifera Girty 1912 clam
Gastropoda
 Murchisoniina - Murchisoniidae
"Murchisonia buttersi" = Helicospira buttersi
"Murchisonia buttersi" = Helicospira buttersi Girty 1912 snail