Paraceraurus Exsul
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''Paraceraurus exsul'' is a species of trilobite that lived in St. Petersburg Region and Tver Region (in erratic blocks) of Russia, Estonia, Finland ( Ă…land, in erratic blocks),
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 ...
, North Germany (in erratic blocks),
Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania ...
and Belarus during the Upper Llanvirnian Stage (463.5-460.9 Ma) Fossilworks
/ref> of the Middle Ordovician. These trilobites can reach a length of about . They show a square front edge, large genal spines on the cheeks and characteristic long pygidial spines. Genal spines are curved usually inward and upward.


References

* Trilobites of the families Cheiruridae and Encrinuridae from Estonia. Geoloogia Instituudi Uurimused (Trud Inst Geol Acad Sci Est SSR) Tallinn, 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.


External links


Paleoart

Fossil ID
Cheiruridae Ordovician trilobites {{phacopida-stub