Collection Data

Page Contents: Section | Significance | Background | Location & Dates | Taxonomic Contents | Documentation | Description of Collection | Collection Inventory | Collection Assets | Level of Taxonomic Identification | Collection Processing | Data Entry | Specimen Integration

Santa Ana Mountains, Turonian Age

Section Responsible for Processing (Top)

Invertebrate Paleontology

Significance (Top)

Collecting of these specimens began in 1926 and has been carried on over the decades by various workers. The specimens are from Turonian Age outcrops (Late Cretaceous epoch, 93.5 to 89.3 million years ago) in the Santa Ana Mountains, Orange County Southern California. Many localities are no longer accessible due to development. Numerous taxonomic and stratigraphic publications have been produced by various authors based on these fossils (see Background, below).

Background (Top)

Willis P. Popenoe and LouElla R. Saul are among the primary collectors and contributors of Turonian fossils from the Santa Ana Mountains. LouElla Saul has identified most of the specimens.

Publications describing type specimens or figure other specimens in the LACMIP collections from the Turonian of the Santa Ana Mountains are summarized here. These are listed in chronological order.

Popenoe, W. P., 1937, Upper Cretaceous Mollusca from southern California. Journal of Paleontology, Volume 11, Number 5, 379-402.

Popenoe, W. P., 1954, Mesozoic formations and faunas, southern California and northern Baja California. California Division of Mines Bulletin, Number 170, 15-21.

Matsumoto, T., 1959, Upper Cretaceous ammonites of California, Part I. Kyushu University, Memoirs of the Faculty of Science, Series D, Geology, Volume 8, Number 4, 91-171.

Dailey, D. H. and W. P. Popenoe, 1966, Mollusca from the Upper Cretaceous Jalama Formation, Santa Barbara County, California. University of California Publications in Geological Sciences, Volume 65, 1-41.

Keen, M. T., 1969, Superfamily Veneracea. Treatise on Invertebrate Paleontology, Part N, Mollusca 6, Volume 2, Bivalvia, 670-690.

Speden, I. G., 1970, The type Fox Hills Formation; Cretaceous (Maestrichtian), South Dakota. Part 2. Systematics of the Bivalvia. Yale University, Bulletin of the Peabody Museum of Natural History, Volume 33, 1-222.

Popenoe, W. P., 1973, Southern California Cretaceous formations and faunas with especial reference to the Simi Hills and Santa Monica Mountains in Cretaceous Stratigraphy of the Santa Monica Mountains and Simi Hills. Society of Economic Paleontologists and Mineralogists, Pacific Section, Fall Guidebook, 15-29.

Stadum, C. J., 1973, A student guide to Orange County fossils. Chapman College Press, Orange, California, 1-64.

Jones, D. L., W. V. Sliter and W. P. Popenoe, 1978, Mid-Cretaceous (Albian to Turonian) biostratigraphy of northern California. Museum d'Historie Naturelle de Nice, Annales, Volume 4, 7-12.

Popenoe, W. P., 1983, Cretaceous Aporrhaidae from California: Aporrhainae and Arrhoginae. Journal of Paleontology, Volume 57, Number 4, 742-765.

Popenoe, W. P. and L. R. Saul, 1987, Evolution and classification of the Late Cretaceous-Early Tertiary gastropod Perissitys. Natural History Museum of Los Angeles County, Contributions in Science, Number 380, 1-37.

Sundberg, F. A., 1989, Propeamussium species (Bivalvia: Propeamussiidae) from the upper Cretaceous of southern California. Journal of Paleontology, Volume 63, Number 1, 53-63.

Saul, L. R. and W. P. Popenoe, 1992, Pacific slope Cretaceous bivalves of the genus Calva. Natural History Museum of Los Angeles County, Contributions in Science., Number 433, 1-68.

Saul, L. R. and W. P. Popenoe, 1993, Additions to Pacific slope Turonian Gastropoda. The Veliger, Volume 36, Number 4, 351-388.

Saul, L. R., 1993, Pacific slope Cretaceous bivalves: eight venerid species. Journal of Paleontology, Volume 67, Number 6, 965-979.

Stallwood, R. B., 1995, A Turonian clavagellid (Bivalvia) from the Ladd Formation of southern California. Journal of Paleontology, Volume 69, Number 1, 84-88.

Elder, W. P., and Saul, L. R., 1996, Taxonomy and biostratigraphy of Coniacian through Maastrichtian Anchura (Gastropoda: Aporrhaiidae) of the North American Pacific slope. Journal of Paleontology, Volume 70, Number 3, 381-399.

Saul, L. R., and Petit, R. E., 1996, Three new Turonian muricacean gastropods from the Santa Ana Mountains, southern California. The Veliger, Volume 39, Number 2, 125-135.

Squires, R. L., and L. R. Saul, 1997, Review of the bivalve genus Plicatula from Cretaceous and lower Cenozoic strata of California and Baja California. Journal of Paleontology, Volume 71, Number 2, 287-298, 1-4.

Saul, L. R., and R. L. Squires, 1997, New species of neritid gastropods from Cretaceous and lower Cenozoic strata of the Pacific slope of North America. The Veliger, Volume 40, Number 2, 131-147, 1-33.

Saul, L. R., 1998, Eight aporrhaid gastropod species from the Cretaceous of the Pacific Slope of North America and clarification of the type species of Perissoptera. Nautilus, Volume 111, Number 4, 119-142.

Saul, L. R., and R. L. Squires, 1998, New Cretaceous Gastropoda from California. Palaeontology, Volume 41, Number 3, 461-488, 1-3.

Saul, L. R., and R. L. Squires, 2002, Added nerineoid gastropod evidence for a warm Turonian sea in southern California. Journal of Paleontology, Volume 76, Number 2, 386-390.

Saul, L. R., and R. L. Squires, 2003, New Cretaceous cerithiform gastropods from the Pacific slope of North America. Journal of Paleontology, Volume 77, Number 3, 442-453.

Squires, R. L., and L. R. Saul, 2004, Uncommon Cretaceous naticiform gastropods from the Pacific slope of North America. The Veliger, Volume 47, Number 1, 21-37.

Squires, R. L., and L. R. Saul, 2004, Cretaceous corbulid bivalves of the Pacific Slope of North America. The Veliger, Volume 47, Number 2, 103-129.

Squires, R. L., and L. R. Saul, 2006, New Late Cretaceous mytilid and tellinoidean bivalves from California. The Veliger, Volume 48, Number 3, 121-135.

Saul, L. R., and R. L. Squires, 2008, Volutoderminae (Gastropoda: Volutidae) of Coniacian through Maastrichtian age from the North American Pacific slope. Journal of Paleontology, Volume 82, Number 2, 213-237.

Taylor, P. D., 2008, Late Cretaceous cheilostome bryozoans from California and Baja California. Journal of Paleontology, Volume 82, Number 4, 823-834.

Squires, R. L., and L. R. Saul, 2009, Cretaceous opine bivalves from the Pacific slope of North America and palaeobiogeography of subfamily Opinae Chavan, 1969. Palaeontology, Volume 52, Number 6, 1311-1347.

Collection Location and Dates (Top)

Turonian, Ladd Formation, Santa Ana Mountains, Orange County, California. Collecting began in 1926 and continues to the present.

Taxonomic Contents (Top)

The collection is primarily composed of mollusks and most of the specimen lots are identified to the species level.

Documentation (Top)

Known locality information has been electronically cataloged and is associated with specimens; a few more localities may be added as specimens are cataloged. Specimens have come to the collections as various times and from various donors and thus are documented by various accession numbers.

Description of Collection (Top)

The specimens are in Lane cases and housed in metal drawers at the Museum's Invertebrate Paleontology South Grand Facility.

Collection Inventory (Top)

41 drawers containing ~2,000 lots of fossils in paper trays; lots may consist of one to multiple specimens.

Collection Assets (Top)

No collection assets available.

Level of Taxonomic Identification (Top)

Date 7: Not identified 6: Phylum 5: Class 4: Order 3: Family 2: Genus 1: Species
07/31/2011 10% 0% 3% 0% 0% 10% 77%
09/13/2010 15% 0% 0% 0% 0% 0% 85%

Collection Processing (Top)

Date 5: Unpack, initial sorting of collection by locality. 4: Xerox/preserve existing label; photo document label/specimens and field notes. 3: Sort specimens from each locality into species lots. 2: Rehouse specimen lots into archival grade containers. 1: Rehousing complete.
07/31/2011 0% 0% 0% 0% 100%
09/15/2010 0% 0% 0% 20% 80%

Data Entry (Top)

Date 4: Enter locality data into IP collection database. 3: Identify species. 2: Enter specimen lot identifications and specimen counts into IP collection database. 1: Data entry complete.
07/31/2011 0% 0% 0% 100%
09/13/2010 100% 0% 0% 0%
Many specimens have already been identified by LouElla Saul. Additional specimens will be identified in the course of data entry.

Specimen Integration (Top)

Date 3: Place specimen lots, arranged by locality, into metal trays for final storage. 2: Integrate specimen trays into the main collection. 1: Specimen integration complete.
07/31/2011 0% 0% 100%
09/15/2010 0% 100% 0%