Top Results for Late Cambrian

Olenus is a genus of trilobites from the Upper Cambrian, with important fossil occurrences in Scandinavia and Wales. The genus gives its name to the Olenus Biozone, a biostratigraphic interval used to correlate Cambrian strata. Olenus is associated with marine environments that could develop low-oxy...

Crepicephalus is an extinct genus of trilobites from the Late Cambrian of North America. It belongs to the broader group of ptychopariid trilobites and is the name-bearing genus of the Crepicephalus Biozone, a biostratigraphic interval used to correlate Cambrian rock layers. Its fossils are therefor...

Cedaria is a genus of Late Cambrian trilobites and the name-bearing taxon for the Cedaria Biozone. This biozone is a biostratigraphic interval used in the correlation of Upper Cambrian rocks, particularly in North America. Cedaria belongs to the ptychopariid branch of trilobite classification and is...

Saukia is a genus of Late Cambrian trilobites in the family Saukiidae. Fossils assigned to the genus are known from North America and Asia, and the name is associated with the Sauk megasequence, a large-scale stratigraphic unit representing extensive Cambrian sedimentation across parts of North Amer...

Elvinia is a genus of Late Cambrian trilobites known from North America. It belongs to the family Elvinidae and provides the name for the Elvinia Biozone, a biostratigraphic interval used to correlate upper Cambrian rocks. Because the genus is tied to a defined fossil zone, Elvinia is of interest to...

Ptychaspis is a genus of Late Cambrian trilobites from North America. It belongs to the family Ptychaspididae and is associated with the ptychaspidid trilobites, a group used in the classification of later Cambrian fossils. The genus also gives its name to the Ptychaspid biomere, a biostratigraphic...

Irvingella is an extinct genus of Late Cambrian trilobites. Fossils attributed to the genus have been reported from several regions, including North America, Europe, Asia, and Australia, giving it value in comparisons of widely separated Cambrian marine faunas. Its distribution and stratigraphic occ...

Parabolina is a genus of Late Cambrian trilobites in the family Olenidae. Species assigned to the genus are known particularly from Scandinavia and other areas that formed part of the Baltic paleocontinental region. Because Parabolina fossils occur in recognizable Late Cambrian intervals, they have...

Saratogia is a genus of Late Cambrian saukiid trilobites known from North America. Early specimens were described from New York State, and the genus has been used in correlation of Upper Cambrian marine strata. As a saukiid, Saratogia had the segmented exoskeleton and mineralized body covering typic...

Late Cambrian trilobite defining the Aphelaspis biozone, a key stratigraphic marker for the Steptoean Stage in the North American Cambrian time scale.

Atops is an extinct genus of trilobites, a group of marine arthropods that lived during the early Cambrian Period. The genus is associated with the late Atdabanian stage, an interval commonly placed in the early part of the Cambrian and dated to roughly 530 to 524 million years ago. Atops is therefo...

Dunderbergia is a Late Cambrian trilobite from the Great Basin of Nevada, USA, named after Dunderberg Peak in the Eureka District.

Parabolinella is a genus of Cambrian trilobites in the family Olenidae. It is closely related to Parabolina and is known from Scandinavian and other Baltic-region fossil deposits. Species of Parabolinella are used in regional Cambrian biostratigraphy, the study of fossil succession used to compare t...

Pterocephalia is an extinct genus of Late Cambrian trilobites assigned to the family Pterocephaliidae. Fossils are known from North American deposits. The genus is distinguished by a broad pygidium, the terminal body shield of a trilobite, with prominent marginal and pleural spines. These features m...

Eurekia is an extinct genus of asaphid trilobites placed in the family Eurekiidae. It is known from Late Cambrian and earliest Ordovician marine rocks of Laurentian North America, including the House Range of Utah, Nevada, and the Upper Mississippi Valley. The genus includes species such as Eurekia...

Taenicephalus is an extinct genus of Upper Cambrian trilobites in the family Parabolinoididae. Its type species, Taenicephalus shumardi, was described from Wisconsin, and the genus is also recorded from Cambrian rocks in Utah and western Canada. The Taenicephalus Zone or Subzone is a regional biostr...

Maryvillia is an extinct genus of Upper Cambrian trilobites in the family Kingstoniidae, within the order Ptychopariida. It is recorded from marine formations in North America, including the Maryville Limestone of Tennessee and Cambrian units in the western United States and Canada. Its species are...