Otis Chalk 6 (Triassic of the United States)

Where: Howard County, Texas (32.2° N, 101.2° W: paleocoordinates 6.9° N, 41.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Otischalkian other zone, Iatan Member (Dockum Formation), Norian (228.0 - 208.5 Ma)

• Otischalkian LVF

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; brown, red mudstone and yellow sandstone

• Dockum strata above the Camp Springs Member in Howard and Mitchell Counties are about 80 m of intercalated reddish brown to grayish red smectitic mudstone, and pale orange to yellowish brown trough crossbedded, micaceous subarkosic sandstone. These

•strata are the Iatan Member of the Dockum Formation (Lucas and Anderson, 1993b)

Size class: macrofossils

Collection methods: quarrying, surface (in situ),

Primary reference: S. G. Lucas, A. R. Hunt, and R. Kahle. 1993. Late Triassic vertebrates from the Dockum Formation near Otis Chalk, Howard County, Texas. New Mexico Geological Society Guidebook, 44th Field Conference, Carlsbad Region, New Mexico and West Texas [R. Butler/E. Dunne]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 194471: authorized by Richard Butler, entered by Emma Dunne on 20.06.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Pseudosuchia - Stagonolepididae
Coahomasuchus sp. Heckert and Lucas 1999 aetosaur
Figure 5 (Lucas et al. 1993)