Paradoxides

Paradoxides; Temporal range: Middle Cambrian; ~
	Paradoxides davidis trapezopyge Bergström & Levi-Setti 1978
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Redlichiida
Family:	†Paradoxididae
Genus:	†Paradoxides; Brongniart, 1822
Species
	P. paradoxissimus (Wahlenberg, 1818) (type species) synonym Entomostracites paradoxissimus; P. carens(Barrande, 1846) ; P. davidis Salter, 1863 P. davidis davidis Salter, 1863; P. davidis intermedius Bergström & Levi-Setti 1978; P. davidis trapezopyge Bergström & Levi-Setti 1978; ; P. gracilis (Boeck, 1827) = Trilobites desideratus, Vinicella desideratus; P. brachyrhachis Linnarsson, 1883; P. bidentatus Westergård, 1936; P. quadrimucronatus Holm MS. in Westergard, 1936; P. briareus Geyer, 1993; P. forchhammeri Angelin, 1854; P. grandoculus McMenamin & Weaver, 2004; P. haywardi Raymond, 1914; P. hicksii Salter, 1865; P. knizeki (Kordule, 1990) ; P. mandiki (Kordule, 1990) ; P. minor (Boeck, 1827) ; P. opanol (Šnajdr, 1978) ; P. rohanovicus (Šnajdr, 1986) ; P. rugulosus Corda, 1847 ; P. sirokyi (Šnajdr, 1986) ; P. walcotti Shaler & Foerste, 1888;
Synonyms
	Entomostracites; Vinicella;

Paradoxides is a genus of large to very large trilobite found throughout the world during the Middle Cambrian period. One record-breaking specimen of Paradoxides davidis, described by John William Salter in 1863, is 37 cm (15 in). The cephalon was semicircular with free cheeks ending in long, narrow, recurved spines. Eyes were crescent shaped providing an almost 360° view, but only in the horizontal plane. Its elongate thorax was composed of 19–21 segments and adorned with longish, recurved pleural spines. Its pygidium was comparatively small. Paradoxides is a characteristic Middle-Cambrian trilobite of the 'Atlantic' (Avalonian) fauna. Avalonian rocks were deposited near a small continent called Avalonia in the Paleozoic Iapetus Ocean. Avalonian beds are now in a narrow strip along the East Coast of North America, and in Europe.

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