Best Early Cambrian
Schmidtiellus is a genus of trilobites known from Lower Cambrian rocks in Estonia and Scandinavia. It belongs to an early phase of trilobite history on the paleocontinent Baltica, and its fossils are used in comparing and dating Cambrian sedimentary sequences in the region. The animal had the segmen...
Serrodiscus is an extinct genus of small trilobites from the Early Cambrian, known from fossil material found in North America and Europe. It belongs to an early group of these marine arthropods and is recognized through features of its segmented dorsal exoskeleton, including a relatively small body...
Daguinaspis is a genus of early trilobites known from Lower Cambrian rocks in Morocco. It belongs to an archaic group of redlichiid trilobites and is important to paleontologists studying the earliest well-documented diversification of animals with mineralized skeletons. Its fossils contribute evide...
Early Cambrian trilobite known from Gondwanan localities including Spain and Morocco, characterized by its distinctly ornamented dorsal exoskeleton.
Olenellus is an extinct genus of early trilobite that lived during the Early Cambrian period. Fossils of this primitive arthropod are primarily located in North America and Greenland, where they define the Olenellus biozone of the lower Cambrian. Olenellus lacks facial sutures and features a large,...
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.
Early Cambrian olenellid trilobite endemic to western North America, particularly Nevada and California, notable for its prominent genal spines.
Early Cambrian olenellid trilobite from western North America, distinguished by its elongated axial lobe and reduced pygidium typical of the Olenellidae.
An Early Cambrian olenellid trilobite from North America, among the earliest trilobites recorded in the fossil sequence of the Laurentian continent.
Early Cambrian olenellid trilobite known from North America and Greenland, characterized by a distinct glabellar structure and relatively large compound eyes.
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.
