Baculite, Ammonite
name: label: Discipline
content: Paleobiology
label: Region
content: US High Plains and Rocky Mountains (ID, MT, ND, SD, WY, CO)
notes: label: Description
content: This object is part of the Education and Outreach collection, some of which are in the Q?rius science education center and available to see.
label: Geologic Age
content: Mesozoic - Cretaceous - Upper/Late - Campanian
label: Notes
content: This specimen is a Baculite. Baculites is an extinct genus of marine mollusk that lived during most of the Late Cretaceous (100.5 to 66 million years ago). Though their shells grew in an almost straight line, they are similar to other ammonite shells, which are chambered with each chamber divided by thin walls (septa). The animal lives only in the largest chamber. As the animal grew, new chambers were created and septa were secreted to partition off the old chamber. Baculites were able to regulate their buoyancy using a siphuncle (living tube of tissue) connected to the empty chambers to control gas content.
label: Number of objects in this record
content: 3
label: Record Last Modified
content: 19 Oct 2023
label: Stratigraphy
content: Uppermost formation
place: label: Collecting Locality
content: North America, United States, Montana, Valley County
topic: label: Topic
content: Education & Outreach
setName: label: See more items in
content: Q?rius, The Coralyn W. Whitney Science Education Center
publisher: label: Scientific Name
content: Baculites eliasi
identifier: label: USNM Number
content: EO51095
objectType: label: Object Type
content: Education and Outreach collections
taxonomicName: label: Taxonomy
content: Animalia, Mollusca, Cephalopoda, Ammonoidea, Ancyloceratina, Baculitidae