Achatella
Encyclopedia
Achatella is a genus of trilobite
in the order Phacopida
, which existed in what is now Ontario
, Canada
. It was named by Delo in 1935, and the type species is Achatella achates, which was originally assigned to the genus Dalmanites
by Billings in 1860. Achatella also contains the species Achatella billingsi, and Achatella truncatocaudata.
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 Phacopida
Phacopida
Phacopida is an order of trilobite that lived from the Ordovician to the Devonian. It is made up of a morphologically diverse group of related suborders....
, which existed in what is now Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....
, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
. It was named by Delo in 1935, and the type species is Achatella achates, which was originally assigned to the genus Dalmanites
Dalmanites
Dalmanites is a genus of trilobite in the order Phacopida.The trilobites of this genus have slightly convex exoskeletons with an average diameter of 4–7 cm . The cephalon is semicircular or parabolic. The glabella is often pear-shaped, and tapers outward toward the front...
by Billings in 1860. Achatella also contains the species Achatella billingsi, and Achatella truncatocaudata.
External links
- Achatella at the Paleobiology DatabasePaleobiology Database' is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms.-History:The Paleobiology Database was founded in 2000. It has been funded by the National Science Foundation and the Australian Research Council...