''Paraceraurus'' is a
genus of
trilobites that lived in the
Ordovician period (485.4 to 443.4 Ma). Its remains have been found in
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
Estonia,
Sweden
Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...
and
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
.
''Paraceraurus'' in the Paleobiology Database
/ref> These trilobites have a rounded and moderately convex ''cephalon
Cephalon, Inc. was an American biopharmaceutical company co-founded in 1987 by pharmacologist Frank Baldino, Jr., neuroscientist Michael Lewis, and organic chemist James C. Kauer—all three former scientists with the DuPont Company. Baldino s ...
''. '' Glabella'' is convex or flattened, with a sub-rectangular outline. Thorax shows eleven segments.[Fossilstock]
/ref>
Selected species
* ''Paraceraurus exsul
''Paraceraurus exsul'' is a species of trilobite that lived in St. Petersburg Region and Tver Region (in erratic blocks) of Russia, Estonia, Finland (Åland, in erratic blocks), Sweden, North Germany (in erratic blocks), Lithuania and Belarus dur ...
''
* '' Paraceraurus aculeatus''
* '' Paraceraurus ingricus''
* '' Paraceraurus gladiator''
* '' Paraceraurus macrophthalmus''
* '' Paraceraurus spinulosus''
[
]
References
* ''Trilobite: Eyewitness to Evolution'' by Richard Fortey
* Trilobites of the families Cheiruridae and Encrinuridae from Estonia.] Geoloogia Instituudi Uurimused rud Inst Geol Acad Sci Est SSRTallinn, 3 1958: 165–205, 210–212. oological Record Volume 95* V. Klikushin, A. Evdokimov, A. Pilipyuk. Ordovician Trilobites of the St. Petersburg Region, Russia, 2009.
Cheiruridae
Ordovician trilobites of North America
Ordovician trilobites of Asia
Phacopida genera
{{phacopida-stub