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Frog Jaw
Images: 
By ThePhysicist
Taxonomy
Frog
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Indet.
Genus: Indet.
Species: Indet.
Author Citation Duméril 1806
Geological Time Scale
Eon: Phanerozoic
Era: Mesozoic
Period: Cretaceous
Sub Period: None
Epoch: Late
International Age: Maastrichtian
Stratigraphy
Hell Creek Formation
Provenance
Date Collected: 09/02/2023
Acquired by: Field Collection
Dimensions
Length: 2.5 mm
Location
Garfield County
Montana
United States
Comments
Identification
According to Dr. Dave DeMar's ID guide for Hell Creek microfossils, frog jaws have a bumpy labial surface (unlike those of salamanders or lizards).
Comments
Frogs have small and fragile skeletons, so identifiable remains are uncommon, especially in the Hell Creek formation where the preservation bias seems to favor large-bodied animals.
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