CIT 1159, Dayton Canyon (Cretaceous of the United States)

Where: Los Angeles County, California (34.2° N, 118.7° W: paleocoordinates 40.1° N, 88.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hoplitoplacenticeras bowersi ammonoid zone, Chatsworth Formation, Middle Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collected by W.P. Popenoe, H.L. Popenoe, R. Durbin in 1935; reposited in the LACM

Collection methods: surface (in situ)

Primary reference: W. P. Elder and L. R. Saul. 1996. Taxonomy and biostratigraphy of Coniacian through Maastrichtian Anchura (Gastropoda; Aporrhaiidae) of the North American Pacific slope. Journal of Paleontology 70(3):381-399 [M. Patzkowsky/K. Layou/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185168: authorized by Matthew Clapham, entered by Matthew Clapham on 14.04.2017, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
 Arcida - Cucullaeidae
 Carditida - Crassatellidae
 Cardiida - Arcticidae
Etea angulata2 Packard 1922 clam
 Cardiida - Mactridae
Cymbophora cf. stantoni2 Arnold 1908 clam
Cymbophora popenoei2 Saul 1974 clam
Cymbophora triangulata2 Waring 1917 clam
 Cardiida - Veneridae
Calva bowersiana2 Cooper 1894 venus clam
 Cardiida - Cardiidae
 Trigoniida - Steinmanellidae
Gastropoda
 Neogastropoda - Mitridae
Paleofusimitra sp.2 Sohl 1963 mitre shell
as Paleofusimitra n. sp.
 Stromboidea - Aporrhaidae
Anchura phaba Elder and Saul 1996 snail
 Naticoidea - Naticidae
Gyrodes (Sohlella) pacificus1 Popenoe et al. 1987 moon snail
 Tonnoidea - Cassidae
Haydenia impressa2 Gabb 1864 snail
 Sorbeoconcha - Turritellidae
Turritella chicoensis2 Gabb 1864 turret shell
as Turritella chicoensis pescaderoensis
Cephalopoda
 Ammonitida - Pachydiscidae
"Anapachydiscus arrialoorensis" = Menuites2
"Anapachydiscus arrialoorensis" = Menuites2 ammonite
 Ammonitida - Desmoceratidae
Desmophyllites diphylloides2 Forbes 1846 ammonite
 Ammonitida - Placenticeratidae
Metaplacenticeras sp.2 Spath 1926 ammonite
 Ammonitida - Diplomoceratidae
? Solenoceras sp.2 Conrad 1860 ammonite