Megathura crenulata
(Sowerby, 1825)

Mollusca, Gastropoda, Fissurellidae

Height: 250 mm

Habitat: on rocks, in protected crevices and spaces

Documented occurrences of Megathura crenulata:



Localities by County, City/Area, and Name Year Earliest* Latest*

Los Angeles Long Beach Long Beach General 1959
Los Angeles Long Beach Long Beach Pier 1959
Los Angeles Long Beach Long Beach Pier
Los Angeles Malibu Point Dume 1958
Los Angeles Marina del Rey Marina Peninsula EM 1988 1994
Los Angeles Palos Verdes Peninsula 0.5 milles east Point Vicente 1961
Los Angeles Palos Verdes Peninsula E side Whites Point 1976
Los Angeles Palos Verdes Peninsula E side Whites Point 1969
Los Angeles Palos Verdes Peninsula Flatrock Point 1960
Los Angeles Palos Verdes Peninsula Lunada Bay 1960
Los Angeles Palos Verdes Peninsula Lunada Bay 1960
Los Angeles Palos Verdes Peninsula Whites Point 1968
Los Angeles Palos Verdes Peninsula Whites Point 1965
Los Angeles Palos Verdes Peninsula Whites Point 1969
Los Angeles Palos Verdes Peninsula Whites Point 1969
Los Angeles Palos Verdes Peninsula Whites Point 1958
Los Angeles San Clemente Island Horse Cove 1939
Los Angeles San Clemente Island San Clemente Island General 1972
Los Angeles San Clemente Island San Clemente Island General 1892 1894
Los Angeles San Clemente Island San Clemente Island, East Side 1953
Los Angeles San Clemente Island Wilson Cove 1975 1979
Los Angeles San Clemente Island Wilson Cove 1966
Los Angeles San Pedro Deadman's Island 1892
Los Angeles San Pedro Deadman's Island 1969
Los Angeles San Pedro Fish Harbor Breakwater 1923
Los Angeles San Pedro Fish Harbor Breakwater 1921
Los Angeles San Pedro Point Fermin 1920
Los Angeles San Pedro Portuguese Bend 1960
Los Angeles San Pedro Portuguese Bend 1965
Los Angeles San Pedro San Pedro Bay 1950
Los Angeles San Pedro San Pedro Bay 1963
Los Angeles San Pedro San Pedro Breakwater 1941
Los Angeles San Pedro San Pedro Breakwater 1951
Los Angeles San Pedro San Pedro General
Los Angeles San Pedro San Pedro General 1902
Los Angeles San Pedro San Pedro General
Los Angeles San Pedro San Pedro General
Los Angeles San Pedro San Pedro General 1916
Los Angeles San Pedro San Pedro General
Los Angeles San Pedro San Pedro General 1895
Los Angeles San Pedro Terminal Island 1969
Los Angeles San Pedro White's Point 1975 1979
Los Angeles San Pedro White's Point 1920
Los Angeles Santa Catalina Island Santa Catalina Island General 1892
Orange Dana Point Dana Point General 1958
Orange Dana Point Dana Point State and County Park 1958
Orange Huntington Beach Anaheim Bay General 1961
Orange Huntington Beach Anaheim Bay Highway 101 Bridge 1957
Orange Laguna Beach Laguna Beach General 1917
Orange Laguna Beach Laguna Beach General 1969
Orange Newport Beach Corona Del Mar 1975 1979
Orange Newport Beach Corona Del Mar 1933
Orange Newport Beach Corona Del Mar 1952
Orange Newport Beach Corona Del Mar 1975
Orange Newport Beach Newport Bay General 1956
Orange Newport Beach Newport Bay, Inside of north breakwater 1958
Orange Newport Beach Newport Channel 1941
Orange Newport Beach Newport Harbor 1941
Orange Seal Beach Anaheim Slough 1938
San Diego La Jolla Bird Rock 1943
San Diego La Jolla Bird Rock 2003 2003 2003
San Diego La Jolla Bird Rock 2003 2003 2003
San Diego La Jolla La Jolla Beach and Tennis Club 1971
San Diego La Jolla La Jolla Cove 1966
San Diego La Jolla La Jolla General
San Diego La Jolla La Jolla General 1913
San Diego La Jolla La Jolla General 1955
San Diego La Jolla La Jolla General 1969
San Diego La Jolla SIO General 2002 2002 2002
San Diego Mission Bay Mariners Basin 1975
San Diego Mission Bay Mission Bay Breakwater/Entrance Channel 1967
San Diego Mission Bay Mission Bay Breakwater/Entrance Channel 1965
San Diego Mission Bay Mission Bay Flood Control Channel 1958
San Diego Mission Bay Mission Bay Flood Control Channel 1970
San Diego Mission Bay Mission Bay Flood Control Channel 1959
San Diego Mission Bay Mission Bay General 1977
San Diego Mission Bay Mission Bay General 1975
San Diego Mission Bay Mission Bay General 1944
San Diego Mission Bay Mission Bay General 1932 1933
San Diego Mission Bay Mission Bay North Side 1968
San Diego Mission Bay Mission Bay South Seawall 1962
San Diego Mission Bay Morrison IX 1929
San Diego Mission Bay Morrison X 1929
San Diego Mission Bay Morrison XI 1929
San Diego Mission Bay Northwest end of Mission Bay Drive Bridge 1972
San Diego Mission Bay Quivira Basin 1973
San Diego Mission Bay Vacation Isle 1971
San Diego Point Loma Cabrillo National Monument General 1976
San Diego Point Loma Cabrillo National Monument Zone 3 2003 2003 2003
San Diego Point Loma Cabrillo National Monument Zone 3 2003 2003 2003
San Diego Point Loma Point Loma General 1971
San Diego Point Loma Point Loma General 1957
San Diego Point Loma Point Loma General 1939
San Diego Point Loma Point Loma General 1967
San Diego Point Loma Point Loma Lighthouse 1958
San Diego Point Loma Point Loma Lighthouse 1966
San Diego San Diego San Diego General
San Diego San Diego San Diego General 1885
San Diego San Diego San Diego General
San Diego San Diego San Diego General 1907
San Diego San Diego San Diego General 1963
San Diego San Diego Sunset Cliffs General 1971
San Diego San Diego Sunset Cliffs General 1978
San Diego San Diego Bay San Diego Bay Quarantine Station
San Diego San Onofre San Onofre General 1969
Santa Barbara San Miguel Island 0.3 miles SE of Bay Point 1967
Santa Barbara San Miguel Island San Miguel Island General 1890
Santa Barbara Santa Barbara Santa Barbara General
Santa Barbara Santa Barbara County Santa Barbara County General 1890
Santa Barbara Santa Cruz Island Santa Cruz Island General 1890
Santa Barbara Santa Cruz Island Willow's Anchorage 1949
Santa Barbara Santa Cruz Island Willow's Anchorage 1950
Santa Barbara Santa Cruz Island Willow's Anchorage 1940
Santa Barbara Santa Rosa Island Santa Rosa Island General 1890
Ventura Oxnard Oxnard Marina 1966