Explore: Agnostida

Agnostida are an order of extinct arthropods which have classically been seen as a group of highly modified trilobites, though some recent research has

a common evolutionary trend. Notable examples of this were the orders Agnostida and Asaphida, and the suborder Illaenina of the Corynexochida. Effacement

Caryosyntrips † (possible radiodont) Deuteropoda Artiopoda † Trilobita † Agnostida (possibly trilobites) † Nektaspida † Aglaspidida † Cheloniellida † Bushizheia

The Spence Shale is the middle member of the Langston Formation in southeastern Idaho and northeastern Utah. It is exposed in the Bear River Range, the

affected conodonts and planktonic forms like graptolites. The trilobites Agnostida and Ptychopariida completely died out, and the Asaphida were much reduced

planktonic forms like conodonts, graptolites, and some groups of trilobites (Agnostida and Pytchopariida, which completely died out, and the Asaphida which were

Agnostidae is a family of Agnostida trilobites. Like all Agnostina, they were eyeless and had only two thoracic segments. These trilobites inhabited benthic

Yukoniidae has an axis of three to seven rings. S. M. GON III. "Order Agnostida". Retrieved December 3, 2010. MIKKO HAARAMO (March 11, 2008). "†Yukoniidae"

classified under the superfamily Agnostoidea of the suborder Agnostina, order Agnostida. The family was first established by the Japanese paleontologist Teiichi

(1997). Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. Treatise on Invertebrate Paleontology. Fatka, O.;