Where: Chihuahua, Mexico (29.5° N, 105.0° W: paleocoordinates 31.8° N, 73.1° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Boquillas Formation, Middle Turonian (93.5 - 89.3 Ma)
• Collignoniceras woollgari zone
• group of beds-level stratigraphic resolution
Environment/lithology: marine
Size class: macrofossils
Preservation: mold/impression
Reposited in the TMM
• '... observations are based on collections in the U.s. Geological survey at the Federal Center, Denver, Colorado, as well as material noted by King & Adkins (1946) and Powell (1963) plus additional material collected by Professor J. M. Hancock and ourselves from Powell's Cannonball Hill locality...'
Primary reference: W. J. Kennedy and W. A. Cobban. 1988. Mid-Turonian ammonite faunas from northern Mexico. Geological Magazine 125(6):593-612 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 38967: authorized by Martin Aberhan, entered by Sabine Nürnberg on 18.05.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Neoptychites sp. Kossmat 1895 ammonite | |
"Spathites coahuilensis" = Spathites (Spathites) coahuilaensis
"Spathites coahuilensis" = Spathites (Spathites) coahuilaensis Jones 1938 ammonite | |
| |
Hoplitoides cf. gibbosulus von Koenen 1897 ammonite
Hoplitoides ingens von Koenen 1897 ammonite |