Picture Guide of San Diego County Mollusks for Survey Inspectors by Patrick Marquez USDA-APHIS-PPQ 11840 S. La Cienega Blvd. Hawthorne, CA 90250 Last Update July 30, 2013 (Subject to change) 1 Helicidae, Cantareus apertus (Born) 2 Helicidae, Cantareus apertus (Born) 3 Helicidae, Cantareus apertus (Born) 4 Helicidae, Cantareus apertus (Born) 5 Helicidae, Cantareus apertus (Born) 6 Helicidae, Otala lactea (Müller) 7 Helicidae, Otala lactea (Müller) 8 Helicidae, Otala lactea (Müller) 9 Helicidae, Otala lactea (Müller) 10 Helicidae, Otala lactea (Müller) 11 Helicidae, Theba pisana (Müller) 12 Helicidae, Theba pisana (Müller) 13 Helicidae, Theba pisana (Müller) 14 Helicidae, Theba pisana (Müller) 15 Helicidae, Theba pisana (Müller) 16 Helminthoglyptidae, Plesarionta sternsiana (Gabb, 1867) 17 Helminthoglyptidae, Plesarionta sternsiana (Gabb, 1867) 18 Habitat for P. stearnsiana. Top & middle left 2 photos facing west. Top & middle right 2 photos facing east. Some seeking shelter in rock crevices. 2/24/2012. Location: References Cheatum, E. P. & Richard W. Fullington 1971a The Aquatic and Land Mollusca of Texas. Part One: The Recent and Pleistocene members of the gastropod family Polygyridae in Texas. Dallas Museum of Natural History, Bulletin 1(1): 1-74. 1971b The Aquatic and Land Mollusca of Texas. Supplement: Keys to the families of the Recent Land and Freshwater snails of Texas. Dallas Museum of Natural History, Bulletin 1(Suppl.): 1-18. 1973 The Aquatic and Land Mollusca of Texas. Part Two: The Recent and Pleistocene members of the Pupillidae and Urocoptidae (Gastropoda) in Texas. Dallas Museum of Natural History, Bulletin 1(2): 1-67. Pilsbry, Henry 1939 Land Mollusca of North America (north of Mexico). Monographs of the Academy of Natural Sciences of Philadelphia, (3), 1(1): 1-573. 1940. Personal Communications Kathryn E. Perez, Ph.D., Department of Biology, University of Wisconsin at La Crosse, 1725 State Street, La Crosse, WI 54601, U.S.A. http://www.uwlax.edu/biology/faculty/perez/ David G. Robinson, Ph.D., USDA APHIS PPQ, Department of Malacology, Academy of Natural Sciences, 1900 Ben Franklin Parkway, Philadelphia, Pennsylvania 19103, U.S.A. Lance Gilbertson, Email, February 13, 2012. ACKNOWLEDGEMENTS Greg Bartman, Los Angeles CA Sara Bombase, San Diego CA Suzete Gomes, Philadelphia PA David G. Robinson, Philadelphia PA 20 .