Top Results for Zone Fossil

Eccaparadoxides is a genus of paradoxidid trilobites from the Cambrian Period. Its fossils are associated with peri-Gondwanan regions, including parts of Iberia and other terranes that were once near the northern margin of Gondwana. The genus is closely related to Paradoxides and is recognized in st...

Oryctocephalus is a genus of corynexochid trilobites from the Cambrian Period. It is known from several paleogeographic regions, and the species Oryctocephalus indicus is associated with a widely used Cambrian biostratigraphic interval. Fossils of the genus are important for correlating marine strat...

Arthricocephalus is a genus of trilobites that lived during the Cambrian Period. Fossils assigned to the genus are especially associated with South China, where they have been used in biostratigraphy to help identify and correlate lower Cambrian rock units. Arthricocephalus belongs to the family Ory...

Kootenia is an extinct genus of corynexochid trilobites from the Middle Cambrian. Fossils assigned to the genus are known from parts of North America and Asia, and Kootenia occurs in rocks formed during the interval associated with Burgess Shale type Cambrian faunas. Its distribution and stratigraph...

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...

Bathyuriscus is a genus of Middle Cambrian trilobites that is widely represented in North American fossil deposits. It is placed in the family Bathyuriscidae and the order Corynexochida, a group whose members commonly had well-developed trilobite body regions and distinctive cephalic forms. The genu...

Glossopleura is a genus of Middle Cambrian trilobites known especially from North American fossil deposits. It belongs to the order Corynexochida and the family Glossopleuridae, and its fossils are used to identify the Glossopleura Biozone. That biozone provides a named interval for regional Cambria...

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...

Ehmaniella is an extinct genus of marjumiid trilobites from the Middle Cambrian. It is known from North American marine strata, especially rocks of the western interior and Basin and Range regions. Species of Ehmaniella have been used in regional biostratigraphy, the practice of correlating rock lay...

Alokistocare is an extinct genus of marjumiid trilobites from the Middle Cambrian. Its fossils are known from marine carbonate deposits in western North America, including parts of the western interior United States. Because species of the genus occur in recognizable stratigraphic intervals, Alokist...

Judomia is an extinct genus of Cambrian trilobites known primarily from Siberian fossil assemblages. It has been used as a biostratigraphic marker in studies of the Botomian interval, helping paleontologists compare Lower Cambrian successions across different regions. The genus is most relevant to r...

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...

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

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...

Corynexochus is a genus of Middle Cambrian trilobites and the type genus of the family Corynexochidae. Fossils assigned to Corynexochus are reported from several regions, including North America, Europe, and Asia, showing that related forms occupied widely separated Cambrian marine environments. The...

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

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

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.

Cotalagnostus is a genus of agnostid trilobites known from Cambrian fossil assemblages. It appears in paleontological records from regions including Argentina, where it occurs in Middle Cambrian deposits associated with other trilobite taxa. Cotalagnostus belongs to the small, generally blind agnost...

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...

Dorypyge is an extinct genus of Middle Cambrian trilobites in the family Dorypygidae and the order Corynexochida. Fossils have been reported from North America and Asia. The genus is recognized by its elongated pygidium, the rear shield of the trilobite body, which bears marginal spines. Dorypyge is...

Tomagnostus is a genus of agnostid trilobites known from Middle Cambrian marine rocks. Its members were small, blind arthropods with a two-part body plan in which the cephalon and pygidium were similar in size and shape. Fossils assigned to Tomagnostus occur across several paleocontinents, making th...

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...