UMNH VP Loc. 1109, HMG Quarry (Cretaceous of the United States)

Where: Kane County, Utah (37.7° N, 111.4° W: paleocoordinates 45.6° N, 82.5° W)

• coordinate estimated from map

When: Middle Member (Kaiparowits Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• lower portion of the middle unit of the upper Campanian Kaiparowits Formation. The stratigraphic position of this site is approximately 190 m from the base of the formation (Roberts et al., 2013: fig. 6.3) and within approximately one meter stratigraphic proximity of bentonite ash bed KP-07, which has produced a U-Pb zircon age of 76.26 ± 0.10 Ma (Roberts et al., 2013), providing a precise age constraint for Akainacephalus johnsoni.

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; sandstone

• crevasse splay sandstone

Size classes: macrofossils, mesofossils

Collection methods: quarrying,

Primary reference: J. P. Wiersma and R. B. Irmis. 2018. A new southern Laramidian ankylosaurid, Akainacephalus johnsoni gen. et sp. nov., from the upper Campanian Kaiparowits Formation of southern Utah, USA. PeerJ 6(e5016) [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196592: authorized by Patricia Holroyd, entered by Patricia Holroyd on 25.09.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

• reported to be multi-taxic bonebed
Reptilia
 Ornithischia - Ankylosauridae
Akainacephalus johnsoni n. gen. n. sp.
Akainacephalus johnsoni n. gen. n. sp. Wiersma and Irmis 2018 ankylosaurid
UMNH VP 20202