USGS 13834 (Cretaceous of the United States)

Also known as Dallas Road, 2.5 miles northeast of Royce City, Collin County;

Where: Collin County, Texas (33.2° N, 96.6° W: paleocoordinates 38.5° N, 74.1° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Neylandville Marl Formation, Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; glauconitic, calcareous claystone

• glauconitic calcareous clay (marl) in ditch, lower part of formation.

Size class: mesofossils

Reposited in the USGS

• 13834: L. W. Stephenson and W. P. Popenoe 1927, 16157: L. W. Stephenson 1932

Primary reference: L. W. Stephenson. 1941. The larger invertebrate fossils of the Navarro group of Texas. The University of Texas Publication 4101:1-625 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 7531: authorized by Matt Kosnik, entered by Matt Kosnik on 18.07.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Turrilitidae
? Turrilites sp.
? Turrilites sp. Lamarck 1801 ammonite
Turrilites? sp.
 Ammonitida - Nostoceratidae
? Helicoceras sp.
? Helicoceras sp. d'Orbigny 1840 ammonite
Helicoceras? sp.
 Ammonitida - Baculitidae
Baculites claviformis
Baculites claviformis Stephenson 1941 ammonite
Baculites claviformis Stephenson
 Ammonitida - Placenticeratidae
Placenticeras meeki
Placenticeras meeki ammonite
Placenticeras meeki Boehm
Gastropoda
 Sorbeoconcha - Naticidae
Gyrodes rotundus
Gyrodes rotundus moon snail
Gyrodes rotundus Stephenson
Bivalvia
 Myalinida - Inoceramidae
Inoceramus sp., Inoceramus ? vanuxemi
Inoceramus sp. Sowerby 1814 clam
Inoceramus sp. a Stephenson 1941
Inoceramus ? vanuxemi clam
Inoceramus vanuxemi Meek and Hayden?
 Pectinida - Anomiidae
Anomia tellinoides
Anomia tellinoides jingle
Anomia tellinoides Morton
 Ostreida - Gryphaeidae
Exogyra cancellata
Exogyra cancellata oyster
Exogyra cancellata Stephenson
 Arcida - Parallelodontidae
Nemodon sp.
Nemodon sp. Conrad 1869 clam
Nemodon sp.
 Cardiida - Cardiidae
Granocardium (Granocardium) deltanum, Granocardium (Granocardium) sp., "Brevicardium tenue" = Nemocardium (Brevicardium)
Granocardium (Granocardium) deltanum cockle
Cardium (Granocardium) deltanum Stephenson
Granocardium (Granocardium) sp. Gabb 1869 cockle
Cardium (Granocardium) spp.
"Brevicardium tenue" = Nemocardium (Brevicardium) cockle
Brevicardium tenue Stephenson
 Cardiida - Glossidae
Glossus irelandi
Glossus irelandi clam
Isocardia irelandi Stephenson
 Cardiida - Arcticidae
Veniella conradi
Veniella conradi Morton 1833 clam
Veniella conradi (Morton)
 Pholadida - Corbulidae
Caestocorbula crassiplica
Caestocorbula crassiplica Gabb 1860 clam
Corbula crassiplica Gabb