USGS 15543, Ben Hur (Cretaceous of the United States)

Where: Limestone County, Texas (31.5° N, 96.7° W: paleocoordinates 36.8° N, 75.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Neylandville Marl Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary, sandy claystone

• sandy clay (marl) with large soft fossiliferous calcium carbonate concretions, unconformably overlain by Corsicana marl; the section is complicated by faulting, but the concretions lie within 40 feet below the contact

Size class: mesofossils

Collected by L.W. Stephenson in 1930; reposited in the USNM

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 7560: 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
Echinoidea
 Spatangoida - Hemiasteridae
"Hemiaster benhurensis n. sp." = Hemiaster wetherbyi
"Hemiaster benhurensis n. sp." = Hemiaster wetherbyi de Loriol 1887 heart urchin
Hemiaster benhurensis Stephenson
Bivalvia
 Arcida - Glycymerididae
Glycymeris sp.
Glycymeris sp. Da Costa 1778 clam
Glycymeris sp.
 Myalinida - Inoceramidae
Inoceramus sp., Inoceramus ? vanuxemi
Inoceramus sp. Sowerby 1814 clam
Inoceramus sp. a and d Stephenson 1941
Inoceramus ? vanuxemi clam
Inoceramus vanuxemi Meek and Hayden?
 Ostreida - Gryphaeidae
Exogyra cancellata
Exogyra cancellata oyster
Exogyra cancellata Stephenson
 Lucinida - Lucinidae
Ctena parvilineata
Ctena parvilineata clam
Lucina parvilineata Shumard
 Cardiida - Arcticidae
Tenea parilis
Tenea parilis clam
Tenea parilis Conrad
Cephalopoda
 Nautilida - Nautilidae
Eutrephoceras planoventer
Eutrephoceras planoventer Stephenson 1941 nautiloid
Eutrephoceras planoventer Stephenson
 Ammonitida - Nostoceratidae
Helicoceras navarroense
Helicoceras navarroense ammonite
Helicoceras navarroense Shumard
 Ammonitida - Baculitidae
Baculites sp., Baculites claviformis
Baculites sp. Lamarck 1799 ammonite
Baculites spp.
Baculites claviformis Stephenson 1941 ammonite
Baculites claviformis Stephenson
 Ammonitida - Diplomoceratidae
Solenoceras texanum
Solenoceras texanum Shumard 1861 ammonite
Solenoceras texanum (Shumard)
 Ammonitida - Scaphitidae
Scaphites rugosus
Scaphites rugosus ammonite
Scaphites rugosus Stephenson
 Ammonitida - Pachydiscidae
"Parapachydiscus sp." = Pachydiscus
"Parapachydiscus sp." = Pachydiscus Zittel 1884 ammonite
Parapachydiscus sp.
Gastropoda
 Heterostropha - Mathildidae
? Gegania sp.
? Gegania sp. Jeffreys 1884 snail
Tuba? sp.
 Cerithioidea - Turritellidae
"Haustator trilira" = Turritella trilira
"Haustator trilira" = Turritella trilira Conrad 1860 turret shell
Turritella trilira Conrad
 Sorbeoconcha - Naticidae
Euspira rectilabrum
Euspira rectilabrum Conrad 1858 moon snail
Polinices rectilabrum texanus Stephenson