Name/Title
Trigonia (Bivalve; Impressions)Entry/Object ID
78.57.100Description
One large mass with 3 Trigonia shell impressions. The shell impressions show the indentation from the raised radial ridges of the Trigonia shell that are dotted along the raised ridge with raised knobs. Found on the Siskiyou mountain range of southern Oregon. Probably of the Hornbrook Formation (mid to late Cretaceous).
Phylum: Mollusca
Class: Bivalvia
Order: Trigoniida
Family: Trigoniidae
Subfamily: Trigoniinae
Genus: †TrigoniaCollection
Delmar Smith CollectionAcquisition
Accession
78.57Source or Donor
Delmar Smith Fossil CollectionAcquisition Method
DonationDimensions
Dimension Notes
8.5" (22 cm) x 7" (18 cm) x 4.5" (11 cm)