''Annamitella'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

trilobite Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most succ ...

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

marine

arthropod Arthropods ( ) are invertebrates in the phylum Arthropoda. They possess an arthropod exoskeleton, exoskeleton with a cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate, a body with differentiated (Metam ...

s. ''Annamitella'' lived from the

Arenig In geology, the Arenig (or Arenigian) is a time interval during the Ordovician period and also the suite of rocks which were deposited during this interval. History The term was first used by Adam Sedgwick in 1847 with reference to the "Areni ...

to the Llandeilo age of the

Ordovician Period The Ordovician ( ) is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon. The Ordovician spans 41.6 million years from the end of the Cambrian Period Ma (mill ...

from 478.6 to 460.9 million years ago.Finney, Global series and stages for the Ordovician System: A progress report, 2005

Distribution

The genus has been reported from: *

Molles Molles (; ) is a commune in the Allier department in central France. Population See also *Communes of the Allier department The following is a list of the 317 Communes of France, communes of the Allier Departments of France, depart ...

San Juan San Juan, Spanish for Saint John (disambiguation), Saint John, most commonly refers to: * San Juan, Puerto Rico * San Juan, Argentina * San Juan, Metro Manila, a highly urbanized city in the Philippines San Juan may also refer to: Places Arge ...

and Suri Formations, Argentina * Nora Formation, Australia * Dawan, Honghuayuan, Laozai, Xiaqiaojia, Duoquanshan, Yingou, Yehli and Shihtzupu Formations, China * Alakul and Uzunbulak Formations, Kazakhstan

References

Leiostegiina Corynexochida genera Ordovician trilobites of Australia Ordovician trilobites of Asia Fossils of China Fossils of Kazakhstan Ordovician trilobites of South America Ordovician Argentina Fossils of Argentina Fossil taxa described in 1916 {{Corynexochida-stub