Where: Denton County, Texas (33.0° N, 97.1° W: paleocoordinates 31.4° N, 61.8° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Conlinoceras tarrantense ammonoid zone, Lewisville Formation (Woodbine Group), Middle Cenomanian (99.6 - 93.5 Ma)
• specimen located 2.75 m above base of section, orig. Arlington Mbr.
• bed-level stratigraphic resolution
Environment/lithology: deltaic; black, gray, carbonaceous mudstone and lithified, pyritic sandstone
Size class: macrofossils
Preservation: trace
Collection methods: quarrying, surface (float), surface (in situ), chemical,
• Collection was made at one time, but from different levels in the 6-m section. Hadrosaur from 2.75 m above section base, crocodilian from 1 m above this, fish and bivalves at section top. Turtle, archosaur phalanx, and another croc element from unspecific locations in section.
Primary reference: J. J. Head. 1996. A primitive hadrosaur (Dinosauria: Ornithischia) from the Cenomanian of Texas and its implications for hadrosaurian phylogenetic and biogeographic histories. Journal of Vertebrate Paleontology 16(3, suppl.):40A [M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 24888: authorized by Matthew Carrano, entered by Matthew Carrano on 22.08.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
Pisces | |
"Pisces indet." = Osteichthyes
"Pisces indet." = Osteichthyes Huxley 1880 bony fish | |
Reptilia | |
Archosauria indet. archosaur | |
Protohadros byrdi n. gen. n. sp.
Protohadros byrdi n. gen. n. sp. Head 1998 ornithopod | |
Crocodylia indet. crocodilian | |
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle | |
Bivalvia | |
Bivalvia indet. Linnaeus 1758 clam |