''Halysites'' (meaning ''chain coral'') is an

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 ...

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 tabulate coral. Colonies range from less than one to tens of centimeters in diameter, and they fed upon plankton. These tabulate corals lived from the

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

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 449.5 to 412.3 Ma). Fossils of ''Halysites'' species have been found in the sediments of

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 ...

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 ...

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 ...

and

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 ...

.
/ref> * ''Halysites catenularia'' Linnaeus, 1767 * ''Halysites encrustans'' Buehler * ''Halysites grandis'' Sharkova, 1981 * ''Halysites infundibuliformis'' Buehler * ''Halysites junior'' Klaamann, 1961 * ''Halysites louisvillensis'' Stumm * ''Halysites meandrina'' Troost * ''Halysites magnitubus'' Buehler * ''Halysites priscus'' Klaamann, 1966 * ''Halysites regularis'' Fischer-Benzon, 1871 * ''Halysites senior'' Klaamann, 1961

References

Tabulata Prehistoric Hexacorallia genera Fossil taxa described in 1813 Late Ordovician first appearances Silurian extinctions Fossils of Australia Fossils of Belarus Fossils of Canada Fossils of China Fossils of the Czech Republic Fossils of Estonia Fossils of India Fossils of Kazakhstan Fossils of Latvia Fossils of Lithuania Fossils of Mongolia Fossils of Norway Fossils of Russia Fossils of Sweden Fossils of Turkey Fossils of Ukraine Fossils of Great Britain Fossils of the United States Fossils of Uzbekistan Paleozoic life of Ontario Paleozoic life of British Columbia Paleozoic life of Manitoba Paleozoic life of New Brunswick Paleozoic life of the Northwest Territories Paleozoic life of Nunavut Paleozoic life of Quebec {{paleo-anthozoa-stub