Acmarhachis
Encyclopedia
Acmarhachis is a genus of trilobite
in the order Agnostida
, which existed in what is now Alabama
, United States
. It was described by Resser in 1938, and the type species is Acmarhachis typicalis.
Trilobite
Trilobites are a well-known fossil group of extinct marine arthropods that form the class Trilobita. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period , and they flourished throughout the lower Paleozoic era before...
in the order Agnostida
Agnostida
Agnostida is an order of arthropod which first developed near the end of the Early Cambrian period and thrived during the Middle Cambrian. They are present in the lower Cambrian fossil record along with trilobites from the Redlichiida, Corynexochida, and Ptychopariida orders...
, which existed in what is now Alabama
Alabama
Alabama is a state located in the southeastern region of the United States. It is bordered by Tennessee to the north, Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama ranks 30th in total land area and ranks second in the size of its inland...
, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It was described by Resser in 1938, and the type species is Acmarhachis typicalis.