Bow Creek; Sugar Bowl Mound (Cretaceous to of the United States)

Also known as Ichthyornis dispar type locality

Where: Rooks County, Kansas (39.6° N, 99.3° W: paleocoordinates 41.7° N, 65.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Smoky Hill Chalk Member (Niobrara Formation), Coniacian to Coniacian (89.8 - 83.6 Ma)

• "Cretaceous" (age assignment based on age of other Niobrara Chalk collections)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified chalk

• "slab of chalk rock"

Size class: macrofossils

Collected by B. F. Mudge in 1872; reposited in the YPM

Primary reference: O. C. Marsh. 1872. Notice of a new and remarkable fossil bird. The American Journal of Science and Arts, series 3 4(19-24):344 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 85276: authorized by John Alroy, entered by John Alroy on 09.12.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Ornithurae -
"Ichthyornis dispar n. gen. n. sp." = Ichthyornis dispar, "Colonosaurus mudgei n. gen. n. sp." = Ichthyornis dispar
"Ichthyornis dispar n. gen. n. sp." = Ichthyornis dispar Marsh 1872 bird
"Colonosaurus mudgei n. gen. n. sp." = Ichthyornis dispar Marsh 1872 bird
believed to be an objective synonym of I. dispar by Walker