Where: Dallas County, Texas (32.6° N, 97.0° W: paleocoordinates 33.0° N, 64.3° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Collignoniceras woollgari ammonoid zone, Kamp Ranch Limestone Formation, Middle Turonian (93.5 - 89.3 Ma)
• "...less than 20 cm above the Turonian Kamp Ranch limestone, which lies in the Collignoceras woollgari Zone. The ten metres overlying the Kamp Ranch have no reported ammonites and the Prionocyclus percarinatus Zone is not recorded... we consider that the postition of [the] type approximates the Collignoceras woollgari Zone... the absolute age is constrained by the underlying Vasoceras birchbyi Zone (93.40 +or- 0.63) and the overlying Prionocyclus percarinatus Zone (90.51 +or-0.45, each separated from the Collignoceras woollgari Zone by one missing zone. an estimate of ~92 Ma for the first appearance of these primitive mosasauroids is not unreasonable" (Jacobs et al. 2005, p. 262).
• formation-level stratigraphic resolution
Environment/lithology: limestone
Size class: macrofossils
Reposited in the TMM
Primary reference: G. L. Bell and M. J. Polcyn. 2005. Dallasaurus turneri, a new primitive mosasauroid from the Middle Turonian of Texas and comments on the phylogeny of Mosasauridae (Squamata). Netherlands Journal of Geosciences 84(3):177-194 [M. Uhen/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 80888: authorized by Mark Uhen, entered by Mark Uhen on 19.05.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Dallasaurus turneri n. gen. n. sp.
Dallasaurus turneri n. gen. n. sp. Bell and Polcyn 2005 mosasaur |