Tweed (Cretaceous to of the United States)

Where: Gove County, Kansas (38.8° N, 100.7° W: paleocoordinates 44.2° N, 69.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Late/Upper Santonian to Late/Upper Santonian (85.8 - 70.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by G. F. Sternberg in 1911

Collection methods: surface (in situ),

Primary reference: L. M. Lambe. 1914. Report of the vertebrate palaeontologist. Summary Report of the Geological Survey Department of Mines for the Calendar Year 1912 1305:397-403 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 188488: authorized by Matthew Carrano, entered by Matthew Carrano on 05.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Heteromi - Stratodontidae
Empo sp. Cope 1872 ray-finned fish
GSC/NMC 8156, skull and trunk
Actinopteri
 Albuliformes - Albulidae
Anogmius polymicrodus Stewart 1898 bonefish
GSC/NMC 8155, skull
 Ichthyodectiformes - Saurodontidae
Gillicus arcuatus Cope 1875
GSC/NMC 8152a, skull
 Ichthyodectiformes - Ichthyodectidae
Ichthyodectes anaides Cope 1872
GSC/NMC 8158, skull
"Portheus molossus" = Xiphactinus audax Leidy 1870
GSC/NMC 8153 skull and trunk
 Crossognathiformes - Pachyrhizodontidae
Pachyrhizodus sp. Agassiz 1850
GSC/NMC 8157, skull