| Filter: Genus=%Mactra%; | Sort by: Accession # Taxon Locality |
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| AccessionNo | Genus | Species | TypeStatus | AuthorDate | Country | State | County | Formation | Age | |
| 66544.01 | Mactra | beali | HOLOTYPE | Hall & Ambrose, 1916 | USA | California | Alameda | Monterey sandstone | MIOCENE | Details |
| 69573.00 | Mactra | californica | VOUCHER | Arnold, 1903 | USA | California | Los Angeles | San Pedro | QUATERNARY | Details |
| 69575.00 | Mactra | exoleta | VOUCHER | Arnold, 1903 | USA | California | Los Angeles | Upper San Pedro Sand | PLEISTOCENE | Details |
| 66643.01 | Mactra | gabbiana | SYNTYPE | Anderson, 1902 | USA | California | Siskiyou ? | CRETACEOUS | Details | |
| 69872.00 | Mactra | gabbiana | VOUCHER | Waring, 1917 | USA | California | Los Angeles | Chico | CRETACEOUS | Details |
| 69.01 | Mactra | sectoris | HOLOTYPE | Anderson & Martin, 1914 | USA | California | Kern | Temblor | MIOCENE | Details |
| 69.02 | Mactra | sectoris | PARATYPE | Anderson & Martin, 1914 | USA | California | Kern | Temblor | MIOCENE | Details |
| 7909.00 | Mactra | sp. | VOUCHER | Clark & Durham, 1946 | Colombia | Bolivar | EOCENE | Details | ||
| 66543.01 | Mactra (Harvella) | elegans | VOUCHER | Yates, 1903 | USA | California | Santa Barbara | PLIOCENE | Details | |
| 4161.00 | Mactra (Mulinia ?) | atlanticola | HOLOTYPE | Anderson, 1929 | Colombia | Atlantico | Tubera group | MIOCENE | Details | |
| 4162.00 | Mactra (Mulinia ?) | atlanticola | PARATYPE | Anderson, 1929 | Colombia | Atlantico | Tubera group | MIOCENE | Details | |
| 66542.01 | Mactra (Mulinia) | densata | VOUCHER | Howard, 1935 | USA | California | Kings ? | Temblor | PLIOCENE | Details |
| 69574.00 | Mactra (Spisula) | catilliformis | VOUCHER | Arnold, 1903 | USA | California | Los Angeles | San Pedro | QUATERNARY | Details |
| 61805.35 | Spisula (Hemimactra) | hannibali | HOLOTYPE | Clark & Arnold, 1923 | Canada | British Columbia | Sooke | OLIGOCENE | Details | |
| 61805.36 | Spisula (Hemimactra) | hannibali | PARATYPE | Clark & Arnold, 1923 | Canada | British Columbia | Sooke | OLIGOCENE | Details |
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