Where: Arkansas (35.8° N, 91.6° W: paleocoordinates 13.9° S, 34.7° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Goniatites multiliratus ammonoid zone, Moorefield Formation, Brigantian (336.0 - 330.9 Ma)
• Moorefield formation, upper part
• bed-level stratigraphic resolution
Environment/lithology: lithified, concretionary, gray limestone
Size class: macrofossils
Collected by Stuart Weller in 1896; reposited in the FMNH
Primary reference: M. Gordon. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322 [J. Alroy/C. Simpson/M. Clapham]more details
PaleoDB collection 158042: authorized by Matthew Clapham, entered by Matthew Clapham on 13.07.2014
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Girtyoceras welleri n. sp.
Girtyoceras welleri n. sp. Gordon 1964 ammonite |