Paraceraurus

Paraceraurus Temporal range: Ordovician
Paraceraurus exsul
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Trilobita
Order:	Phacopida
Suborder:	Cheirurina
Family:	Cheiruridae
Genus:	Paraceraurus Männil, 1958 [1]

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, Estonia, Sweden and North America.[2] These trilobites have a rounded and moderately convex cephalon. Glabella is convex or flattened, with a sub-rectangular outline. Thorax shows eleven segments.[3]

Selected species

• Paraceraurus exsul
• Paraceraurus aculeatus
• Paraceraurus ingricus
• Paraceraurus gladiator
• Paraceraurus macrophthalmus
• Paraceraurus spinulosus

[3]

References

1. Organism Names
2. Paraceraurus in the Paleobiology Database
3. Fossilstock

• Trilobite: Eyewitness to Evolution by Richard Fortey
• 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. [Zoological Record Volume 95]
• V. Klikushin, A. Evdokimov, A. Pilipyuk. Ordovician Trilobites of the St. Petersburg Region, Russia, 2009.