| Filter: Genus=%Trigonia%; | Sort by: Accession # Taxon Locality |
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| AccessionNo | Genus | Species | TypeStatus | AuthorDate | Country | State | County | Formation | Age | |
| 70550.00 | Trigonia | aequicostata | VOUCHER | Reagan, 1924 | USA | California | Shasta | CRETACEOUS | Details | |
| 70551.00 | Trigonia | aequicostata | VOUCHER | Reagan, 1924 | USA | California | Shasta | CRETACEOUS | Details | |
| 252.01 | Trigonia | bowersiana | HOLOTYPE | Anderson, 1958 | USA | California | Orange | CRETACEOUS | Details | |
| 66709.01 | Trigonia | branneri | HOLOTYPE | Anderson, 1958 | USA | California | Siskiyou | Chico | CRETACEOUS | Details |
| 1788.01 | Trigonia | churchi | HOLOTYPE | Anderson, 1958 | USA | California | Santa Barbara | CRETACEOUS | Details | |
| 1291.04 | Trigonia | colusaensis | HOLOTYPE | Anderson, 1958 | USA | California | Colusa | Venado | CRETACEOUS | Details |
| 69897.00 | Trigonia | evansana | VOUCHER | Waring, 1917 | USA | California | Ventura | Chico | CRETACEOUS | Details |
| 12123.01 | Trigonia | hemphilli | HOLOTYPE | Packard, 1921 | USA | California | San Mateo | Pigeon Point | CRETACEOUS | Details |
| 61873.01 | Trigonia | klamathonia | HOLOTYPE | Anderson, 1958 | USA | California | Siskiyou | CRETACEOUS | Details | |
| 61899.01 | Trigonia | melhasei | SYNTYPE | Anderson, 1958 | USA | California | Shasta | CRETACEOUS | Details | |
| 61899.02 | Trigonia | melhasei | SYNTYPE | Anderson, 1958 | USA | California | Shasta | CRETACEOUS | Details | |
| 1345.02 | Trigonia | packardi | HOLOTYPE | Anderson, 1958 | USA | California | Shasta | CRETACEOUS | Details | |
| 66706.01 | Trigonia | perrinsmithi | HOLOTYPE | Anderson, 1958 | USA | California | Shasta | CRETACEOUS | Details | |
| 68243.00 | Trigonias | USA | Colorado | OLIGOCENE | Details |
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