CIT loc. 985, Williams Creek, Santa Ana Mountains (Cretaceous of the United States)

Also known as LACMIP loc. 6097; LACMIP loc. 10721

Where: Orange County, California (33.7° N, 117.6° W: paleocoordinates 39.4° N, 87.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Holz Shale Member (Ladd Formation), Middle Campanian (83.5 - 70.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collected by W. P. Popenoe; reposited in the LACM

Collection methods: surface (in situ)

Primary reference: W. P. Popenoe. 1942. Upper Cretaceous formations and faunas of southern California. Bulletin of the American Association of Petroleum Geologists 26(2):162-187 [J. Marcot/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 220912: authorized by Jonathan Marcot, entered by Jonathan Marcot on 26.06.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Sorbeoconcha - Naticidae
"Euspira shumardiana" = Polinices shumardianus
"Euspira shumardiana" = Polinices shumardianus Gabb 1864 moon snail
 Sorbeoconcha - Capulidae
"Lysis californiensis" = Lysis suciensis
"Lysis californiensis" = Lysis suciensis Whiteaves 1879 snail
 Neogastropoda - Volutidae
Volutoderma santana Packard 1922 volute
 Cerithioidea - Turritellidae
Turritella chicoensis Gabb 1864 turret shell
as ssp. Turritella chicoensis perrini
Cephalopoda
 Ammonitida - Baculitidae
Baculites chicoensis Trask 1856 ammonite
Bivalvia
 Arcida - Cucullaeidae
"Cucullaea youngi" = Cucullaea (Idonearca) youngi
"Cucullaea youngi" = Cucullaea (Idonearca) youngi Waring 1917 clam
 Arcida - Glycymerididae
"Glycymeris veatchii" = Glycymerita veatchii
"Glycymeris veatchii" = Glycymerita veatchii Gabb 1864 clam
 Arcida - Arcidae
Trinacria cor Popenoe 1937 clam
 Cardiida - Mactridae
Cymbophora ashburnerii Gabb 1864 clam
 Carditida - Crassatellidae
Crassatella lomana Cooper 1894 clam
 Trigoniida - Megatrigonioidae
"Trigonia cf. evansana" = Pterotrigonia evansana
"Trigonia cf. evansana" = Pterotrigonia evansana Meek 1864 clam
 Nuculida - Nuculidae
"Acila demessa" = Acila (Truncacila) demessa
"Acila demessa" = Acila (Truncacila) demessa Finlay 1927 divaricate nutclam