Baculities compressus

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Baculites is a genus of extinct marine animals. They were straight-shelled ammonites that were globally distributed during the Late Cretaceous (100 to 65 million years ago). Because of their shape, Baculites may have lived in a vertical orientation with the arms hanging down. Some adults grew up to two meters long, but their fossils are usually fragmentary. Ammonites like Baculites had a chambered shell, and controlled their buoyancy by filling the chambers with gas. The walls separating the chambers are called septa, and form visible lines called sutures on the outer-shell. The patterns formed by suture lines are often used as diagnostic characters to identify species. Baculites shells were very brittle and often broke along the suture lines, as is the case for this specimen.

 

Height: 38.7 mm
Width: 65.3 mm
Length: 42.6 mm
Time: Upper Cretaceous
Locality: Central and South Montana
Specimen: UC Davis Teaching Collection: P-992.

Mollusca Cephalopoda Ammonoidea Ammonitida Ancyloceratine Baculitidae Baculities compressus

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3D model :
Text: Weihow Hsue

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