Best Agnostida

A Late Cambrian agnostid trilobite genus whose type species, Agnostotes orientalis, defines a key global biozone near the Cambrian–Ordovician boundary.

Eodiscus is a Cambrian trilobite that serves as the type genus of the order Eodiscida, known from Burgess Shale-type deposits in North America.

Acadagnostus is a Cambrian agnostid trilobite described by Kobayashi in 1939, known from North America, Europe, and Australia.

A tiny blind Cambrian agnostid trilobite with nearly identical head and tail shields, distributed globally and widely used as a biostratigraphic index fossil.

A Cambrian agnostid trilobite with worldwide distribution, serving as an important biostratigraphic index fossil for Middle to Late Cambrian correlations.

A Middle Cambrian trilobite genus from Yunnan, China, known from the Kaili Formation and contributing to understanding of the Early–Middle Cambrian faunal transition in East Asia.

A Cambrian eodiscid trilobite with a broad geographic range, Pagetia is found in deposits across North America, Australia, and Asia.

A small Ordovician agnostid trilobite, Geragnostus had a nearly cosmopolitan distribution and is recognized by its short cephalon and broad pygidium.

A cosmopolitan Cambrian agnostid trilobite, Cotalagnostus is recognized by its distinctive two-segmented pygidial axis and wide geographic distribution.

A Cambrian agnostid trilobite with a near-global distribution, widely used in biostratigraphic correlation of Middle Cambrian strata across multiple paleocontinents.

A tiny blind Middle Cambrian agnostid trilobite with an isopygous body plan, distributed globally and used as a reliable biostratigraphic index fossil.

A genus of early Cambrian agnostid trilobites representing one of the oldest known agnostids, providing insight into the origin of the blind, isopygous agnostid body plan.

A genus of very small Cambrian agnostid trilobites recognized across multiple continents, valued for fine-scale biostratigraphic subdivision of Cambrian strata.

Leiagnostus is a Cambrian agnostid trilobite noted for its smooth, unornamented exoskeleton, found in deposits across Europe, North America, and Asia.

A Cambrian agnostid trilobite known from multiple continents, used in biostratigraphic correlation of Middle Cambrian sequences across Gondwana and Laurentia.

A Cambrian agnostid trilobite used as a biostratigraphic index fossil, with G. nathorsti defining a standard zone in Cambrian correlation schemes worldwide.

A Middle to Late Cambrian agnostid trilobite whose species L. laevigata defines a globally recognized biozone marking a key interval in upper Cambrian stratigraphy.

A small Cambrian blind trilobite genus related to Agnostida, known from Cambrian deposits across several regions and employed in biostratigraphic zonation of Cambrian sequences.

Small Early Cambrian trilobite known from Laurentian and Siberian deposits, used in intercontinental correlation of lower Cambrian biostratigraphic zones.

Late Cambrian trilobite from North America notable for its highly reduced exoskeleton and very few thoracic segments, reflecting an unusual body plan within Trilobita.