Top Results for Ptychopariida

Elrathia kingii is an extinct ptychopariid trilobite from the Middle Cambrian Wheeler Shale of western Utah. Its fossils are exceptionally abundant in parts of that formation, making it one of the most familiar and commercially collected North American trilobites. The species is recognized by its br...

Elrathia is an extinct genus of ptychopariid trilobite that lived during the Middle Cambrian period. Fossils of this marine arthropod are abundantly preserved in the Wheeler Shale formation in Utah, USA. Due to the vast quantities found, Elrathia kingii is one of the most commercially available and...

Modocia is a genus of ptychopariid trilobites known from Middle Cambrian marine rocks. Fossils assigned to the genus occur in North American formations, including Utah's Wheeler Shale and related Cambrian units in the western United States. Like other trilobites, Modocia had a segmented mineralized...

Dikelocephalus is a large Late Cambrian trilobite genus known from Wisconsin, USA, including material from the St. Lawrence Formation. It belongs to the ptychopariid trilobites and is notable for its substantial size and abundance in parts of its fossil record. Because it is associated with a define...

Norwoodia is an extinct genus of Cambrian trilobites, a group of marine arthropods known from their mineralized exoskeletons. Fossil species assigned to the genus occur in Cambrian deposits of the Great Basin and are classified within the ptychopariid branch of trilobite taxonomy. Norwoodia is studi...

Conocoryphe is an extinct genus of Middle Cambrian trilobites in the family Conocoryphidae. Fossils are known from regions that include the Czech Republic, France, Spain, Turkey, and Wisconsin, and many species are characterized by reduced or absent eyes, although the genus also records variation in...

Ellipsocephalus is a genus of ptychopariid trilobites from the Cambrian Period. It is especially associated with Cambrian rocks of Bohemia in the Czech Republic, where the species Ellipsocephalus hoffi is a well-known fossil. The genus has a generally smooth exoskeleton and a broad, clearly segmente...

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...

Ptychoparia is a genus of Middle Cambrian trilobites from Bohemia and other Cambrian fossil localities. It is the type genus of Ptychopariida, a major trilobite order that includes a wide range of forms and became one of the most diverse groups in trilobite classification. Ptychoparia is therefore i...

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...

Dionide is a genus of Ordovician trilobites in the family Dionididae. It is known from European Ordovician deposits and is described as having a notably broad cephalic border, a feature of the head shield that helps distinguish the genus from other contemporaneous trilobites. Dionide is relevant to...

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...

Sao is an extinct genus of small Cambrian trilobites associated with the fossil-bearing rocks of Bohemia. It was described and illustrated in the nineteenth-century work of Joachim Barrande, whose studies of Bohemian Paleozoic fossils helped establish the importance of the region for trilobite resea...

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...

Bonnia is an extinct genus of Middle Cambrian trilobites known from marine rocks in North America. Its fossils occur in Laurentian sequences and have been used with other trilobites to compare the relative ages of Cambrian sedimentary layers. Bonnia is of interest to paleontologists studying the evo...

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...

Agraulos is a genus of Cambrian trilobites in the family Ptychopariidae. The genus was described by Joachim Barrande in 1846 and is especially associated with Middle Cambrian marine deposits in Bohemia, in the present-day Czech Republic. Like other ptychopariid trilobites, Agraulos had a segmented e...

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...

Shumardia is a genus of small Ordovician trilobites in the family Shumardiidae. The genus was named after the American geologist Benjamin Franklin Shumard and is known from European fossil localities. Shumardia is distinguished by its diminutive size and reduced eyes, features that make it useful fo...

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...