''Alnus heterodonta'' is an
extinct species
This page features lists of extinct species, organisms that have become extinct, either in the wild or completely disappeared from Earth.
In actual theoretical practice, a species not definitely located in the wild in the last fifty years of cur ...
of
alder
Alders are trees comprising the genus ''Alnus'' in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few sp ...
from the early
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...
Bridge Creek floras of
Central Oregon
Central Oregon is a geographic region in the U.S. state of Oregon and is traditionally considered to be made up of Deschutes, Jefferson, and Crook counties. Other definitions include larger areas, often encompassing areas to the north towards the ...
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References
Oligocene plants
heterodonta
Heteroconchia is a taxonomic infraclass of saltwater clams, marine bivalve molluscs, belonging to the subclass Autobranchia
This infraclass includes the edible clams, the cockles and the Venus clams.
Description
These bivalves are distinguis ...
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