Top Results for Agnostida

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

Eodiscus is a genus of small Cambrian trilobites and the type genus of the order Eodiscida. Eodiscid trilobites are characterized by a compact body and a head and tail that can appear broadly similar in outline; many members were blind or had reduced eyes. Fossils assigned to Eodiscus are known from...

Acadagnostus is a genus of Cambrian agnostid trilobites described by Teiichi Kobayashi in 1939. Agnostids were small marine trilobites with a simplified body form, and many lacked functional eyes. Acadagnostus has been reported from Cambrian rocks in regions that include North America, Europe, and A...

Agnostus is a genus of small Cambrian agnostid trilobites. Members typically had a compact body with head and tail shields that were similar in size and outline, and many species were blind or had highly reduced eyes. Agnostus fossils occur in Cambrian marine rocks on several continents, and some sp...

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

Pagetia is a genus of small eodiscid trilobites assigned to the family Pagetiidae and the order Agnostida. It lived during the Cambrian, including the Wuliuan and Guzhangian stages, and fossils have been reported from North America, Asia, Australia, Antarctica, and other regions. The genus is distin...

Geragnostus is a genus of agnostid trilobites, an extinct group of small marine arthropods whose fossils are important in Cambrian and Ordovician biostratigraphy. The genus has been recorded from European fossil localities, including the Arenaceous Beds of the Shineton Shales Formation in England. A...

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...

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...

Peronopsis is a genus of small, blind agnostid trilobites from the Cambrian Period. It had an isopygous body plan, meaning the cephalon and pygidium were broadly similar in size, and its body was divided into a limited number of segments compared with many other trilobites. Peronopsis fossils are wi...

Eoagnostus is an extinct genus of early agnostid trilobites known from terminal Lower Cambrian to earliest Middle Cambrian rocks. Its recorded occurrences include the Kinzers Shale and other formations in the eastern United States, Newfoundland, and Greenland. The genus is highly effaced: the fronta...

Micragnostus is an extinct genus of small agnostid trilobites in the family Agnostidae, named by Howell in 1935 with Agnostus calvus as its type species. It is recorded from Upper Cambrian strata in regions including Wales, Scandinavia, Australia, East and South Asia, and parts of the Americas, and...

Leiagnostus is an extinct genus of agnostid trilobites in the family Agnostidae, established by Otto Jaekel in 1909. It is known from late Cambrian and Ordovician strata, including records from Baltoscandia, central Europe, China, Kazakhstan, and Argentina. The genus is highly effaced: facial suture...

Diplagnostus is an extinct genus of small agnostid trilobites, classified in the family Diplagnostidae. It is known mainly from Middle Cambrian marine strata, with named species and records reported from Scandinavia, Australia, Argentina, North Greenland, and other regions. Because agnostoid species...

Goniagnostus is an extinct genus of small agnostid trilobites from the Middle Cambrian. The species Goniagnostus nathorsti defines the Goniagnostus nathorsti Zone, a biostratigraphic interval used for correlation in Scandinavia, Kazakhstan, Australia, and other Cambrian regions. Agnostids have a com...

Lejopyge is an extinct genus of small, blind agnostid trilobites in the family Ptychagnostidae. Its species Lejopyge laevigata lived during the Guzhangian Stage of the Middle Cambrian and has a broad geographic distribution in marine strata. The first appearance of Lejopyge laevigata is used to defi...

Hupetina is an extinct genus of early Cambrian trilobites generally placed in the family Bigotinidae within Ptychopariida. Its type species, Hupetina antiqua, is known from lowermost Cambrian strata in Morocco, where it occurs in early trilobite faunas. The cephalon has a strongly convex, moderately...

Pagetiellus is a small extinct trilobite genus associated with the agnostid family Pagetiidae in older Cambrian classifications. It is linked with early Cambrian faunas of Siberia and has also appeared in discussions of Laurentian material, making the name relevant to comparisons among regional bios...

Bolaspis is an extinct genus of Middle Cambrian trilobites in the family Bolaspididae. It is known from western North American formations, including the Wolsey Shale of Montana and the Marjum Formation, and its species have been included in studies of Cambrian trilobite faunas. The genus is represen...