UCLA loc. 4140, Jalama Creek (Cretaceous of the United States)

Also known as LACMIP loc. 24140

Where: Santa Barbara County, California (34.5° N, 120.4° W: paleocoordinates 40.6° N, 90.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: III Member (Jalama Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• scale of strat. resolution may be couple of beds. JA: the Jalama Formation is lower upper Campanian according to Squires and Saul 2003

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, brown sandstone and gray, sandy shale

• "120-175' thick. Dark brown, arkosic sandstone, interbedded with gray sandy shale."

Size class: macrofossils

Collection methods: mechanical,

Primary reference: D. H. Dailey and W. P. Popenoe. 1966. Mollusca from the upper Cretaceous Jalama Formation, Santa Barbara County, California. University of California Publications in Geological Sciences 65:1-41 [J. Alroy/M. Sommers/A. Clement]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 1545: authorized by John Alroy, entered by Mike Sommers on 13.05.1999, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundances: R (rare) 1-2 specs., U (uncommon) 3-10 specs., C (common) 11-25 specs., A (abundant) 26+ specs.
Gastropoda
 Heterostropha - Acteonidae
Actaeon inornatus White 1889 snail
originally entered as "Acteon inornatus"
Nonacteonina obesa Dailey and Popenoe 1966 snail
 Heterostropha - Ringiculidae
Biplica obliqua Gabb 1864 snail
 Opisthobranchia - Scaphandridae
Ellipsoscapha skaios Dailey and Popenoe 1966 snail
 Neritoidea - Neritidae
Nerita sp. Linnaeus 1758 snail
 Epitonioidea - Epitoniidae
Claviscala sp. DeBoury 1909 wentletrap
 Sorbeoconcha - Naticidae
"Gyrodes canadensis" = Gyrodes (Sohlella) canadensis Whiteaves 1903 moon snail
Euspira sp. Agassiz 1837 moon snail
 Neogastropoda - Melongenidae
"Fulgur hilgardi" = Pentzia hilgardi
"Fulgur hilgardi" = Pentzia hilgardi White 1889 snail
 Sorbeoconcha - Aporrhaidae
"Lispodesthes rotundus" = Lispodesthes rotundatus
"Lispodesthes rotundus" = Lispodesthes rotundatus Waring 1917 snail
Bivalvia
 Nuculida - Nuculidae
"Acila demessa" = Acila (Truncacila) demessa
"Acila demessa" = Acila (Truncacila) demessa Finlay 1927 divaricate nutclam
 Arcida - Arcidae
Trinacria cor Popenoe 1937 clam
 Arcida - Glycymerididae
"Glycymeris suciensis" = Glycymerita veatchii
"Glycymeris suciensis" = Glycymerita veatchii Gabb 1864 clam
 Cardiida - Mactridae
"Tellina mathewsonii" = Willimactra (Petromactra) mathewsonii Gabb 1864 clam
Cymbophora cf. ashburnerii Gabb 1864 clam
originally entered as "Cymbophora cf. ashburnerii"
 Pholadida - Corbulidae
"Corbula pozo" = Panzacorbula pozo
"Corbula pozo" = Panzacorbula pozo Dailey and Popenoe 1966 clam