''Encrinurus'' is a long-lived
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 ...
of
phacopid 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 ...
s that lived in what are now
Africa
Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...
,
Asia
Asia ( , ) is the largest continent in the world by both land area and population. It covers an area of more than 44 million square kilometres, about 30% of Earth's total land area and 8% of Earth's total surface area. The continent, which ...
,
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
,
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
,
North America
North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri ...
, and
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ...
from the middle
Ordovician
The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...
to the early
Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...
from 472 to 412.3
mya, existing for approximately .
Taxonomy
''Encrinurus'' was named by Emmrich in 1844. Jell and Adrain (2003) list it as a currently valid genus name within the
Phacopida
Phacopida ("lens-face") is an order of trilobites that lived from the Late Cambrian to the Late Devonian. It is made up of a morphologically diverse assemblage of taxa in three related suborders.
Characteristics
Phacopida had 8 to 19 thoraci ...
, specifically within the
Encrinuridae
Encrinuridae is a family of trilobite within the order Phacopida that lived in what would be Africa, Asia, Australia, Europe, North America, and South America from the middle Ordovician to the early Devonian from , existing for approximately 66.7 ...
.
[P. A. Jell and J. M. Adrain. 2003. Available generic names for trilobites. Memoirs of the Queensland Museum 48(2):331-553]
References
Further reading
* ''Fossils'' (Smithsonian Handbooks) by David Ward
* ''Trilobites'' by Riccardo Levi-Setti
* ''Invertebrate Palaeontology and Evolution'' by E.N.K. Clarkson
* ''Trilobites: Common Trilobites of North America'' (A NatureGuide book) by Jasper Burns
Encrinuridae
Ordovician trilobites
Silurian trilobites
Devonian trilobites
Trilobites of Africa
Trilobites of Asia
Trilobites of Oceania
Trilobites of Europe
Trilobites of North America
Ordovician trilobites of South America
Middle Ordovician first appearances
Early Devonian genus extinctions
Paleozoic life of Ontario
Verulam Formation
Paleozoic life of British Columbia
Paleozoic life of Manitoba
Paleozoic life of the Northwest Territories
Paleozoic life of Nunavut
Paleozoic life of Quebec
Fossil taxa described in 1844
Phacopida genera
{{Phacopida-stub