Best Early Cambrian

An Early Cambrian trilobite from Australia and Asia that serves as an index fossil for lower Cambrian deposits, with a distinctive elongated pleural region.

An early Cambrian redlichiid trilobite from South China, among the earliest well-documented trilobites and significant for understanding the initial radiation of the class.

One of the earliest known trilobite genera, from the Early Cambrian of Morocco and North America, critical for understanding the origin of the group.

An early Cambrian trilobite from Scandinavia, namesake of the Holmia biozone used to correlate lower Cambrian strata across the Baltic and North Atlantic regions.

An early Cambrian trilobite found in Moroccan and Iberian deposits, belonging to the paradoxidid-related group and used in Lower Cambrian biostratigraphic correlation of peri-Gondwanan terranes.

An early Cambrian olenellid trilobite from Newfoundland, Canada, namesake of the Callavia biozone and a key marker for lower Cambrian stratigraphy in Laurentia.

An early Cambrian trilobite known from South China and other Cambrian Stage 2 deposits, representing one of the stratigraphically oldest trilobite forms in the fossil record.

An Early Cambrian olenellid trilobite from North America, among the earliest trilobites recorded in the fossil sequence of the Laurentian continent.

An early Cambrian trilobite from Norway and Sweden, known from lower Cambrian deposits of Scandinavia and associated with the early diversification of the class Trilobita.

Middle Cambrian ptychopariid trilobite from North America, known from deposits in the western United States and Canada.

Early Cambrian trilobite serving as a key biostratigraphic index fossil for Atdabanian-age strata in Siberia and other Cambrian paleocontinental provinces.

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