Top Results for Silurian

Palaeophonus nuncius is an extinct species of scorpion that lived during the Silurian period. Fossils of this arachnid were discovered in Sweden and described by Thorell and Lindström in 1884. As one of the oldest known scorpion genera, Palaeophonus retains primitive features. Paleontologists classi...

Calymene blumenbachii is a species of trilobite from Silurian rocks, particularly the Wenlock Limestone around Dudley in the English West Midlands. Its compact, segmented exoskeleton could roll into a defensive ball, and abundant local fossils became popularly known as the Dudley Bug or Dudley Locus...

Aulacopleura is a genus of small trilobites known especially from Silurian deposits in the Czech Republic. Large assemblages of Aulacopleura koninckii preserve individuals across many growth stages, allowing researchers to reconstruct how segments were added and body proportions changed during devel...

Dalmanites limulurus is an extinct species of trilobite from Silurian rocks in New York State, including the Rochester Shale. It belongs to Dalmanitidae, a family within the order Phacopida, and has the prominent eyes, segmented exoskeleton, and elongated terminal spine associated with its genus. It...

Deiphon represents a notable Silurian trilobite genus belonging to the Cheiruridae family. This European fossil, discovered in Bohemia, is characterized by its globose body shape and prominent spines on the glabella. It’s particularly valuable for paleontologists studying the evolution of early tril...

Brontoscorpio anglicus was a giant scorpion that lived during the Silurian period approximately 420 million years ago. Fossils discovered in England reveal it to be one of the largest known scorpions from this era. Its unique aquatic ancestry and substantial size make it an important subject for pal...

Calymene blumenbachi represents an iconic Silurian trilobite discovered primarily in European deposits dating back to the Early Paleozoic Era. This enrolled phacopida species is notable for being among the earliest trilobites meticulously documented by scientists. Its well-preserved fossil remains p...

Proscorpius osborni represents a crucial early scorpion fossil discovered in New York during the Silurian period approximately 420 million years ago. This extinct species is notable as one of the oldest known scorpion remains, offering significant insight into the evolutionary origins of scorpions a...

Roderick Murchison was a Scottish geologist renowned for his pioneering work in stratigraphy. His detailed surveys of Scotland, particularly concerning Silurian rock formations, led to the formal definition and naming of the Silurian geological period during the 1830s. This established a crucial ben...

Arctinurus is an extinct genus of large trilobites that lived during the Silurian period, primarily discovered in the Rochester Shale deposits of New York State. The genus is easily recognized by its broad, heavy exoskeleton and distinctive stellate, or star-like, outline when viewed from above. Pal...

Eurypterus remipes was an aquatic arthropod, commonly called a sea scorpion, that lived during the Silurian Period. Fossils are especially abundant in rocks of New York State, where exceptionally preserved specimens reveal its segmented body, broad swimming appendages, and paddle-shaped rear limbs....

Waeringoscorpius hefteri is an extinct species of scorpion that lived during the Silurian period, approximately 443-419 million years ago. Fossil specimens have been discovered in the Bertie Group of New York state, preserving details of these early arachnids. The genus was named by paleontologist E...

Encrinurus is an extinct genus of trilobite belonging to the order Phacopida that lived during the Silurian period. Fossils of this marine arthropod are widely distributed across sedimentary deposits in North America and Europe. It is easily recognized by its heavily tuberculate exoskeleton and a di...

An Ordovician cheirurid trilobite named for its cross-shaped glabella, recorded from Baltoscandia and the British Isles across multiple Ordovician stages.

Dalmanites is an extinct genus of phacopid trilobites that existed throughout the Silurian and Early Devonian periods. Fossils of this arthropod are widespread, commonly discovered in marine sedimentary rocks across North America, Europe, and South America. It is physically recognized by its well-de...

Calymene is a genus of trilobites that lived primarily during the Silurian period, with fossils commonly found across Europe and North America. As a member of the order Phacopida, these arthropods are recognized for their well-preserved enrolled fossils. The species Calymene blumenbachii, nicknamed...

Monograptus priodon is an extinct species of colonial graptolite that existed during the Silurian period. The fossil is characterized by a single, unbranched stipe and is found globally in marine sedimentary rocks. Because of its distinct morphology and widespread distribution, paleontologists use i...

Trimerus is an extinct genus of homalonotid trilobites that lived from the Silurian into the Devonian. It is recognized by a broad, weakly trilobate body, a large head with an expanded anterior margin, and a pygidium that is typically triangular; some species exceeded 20 centimeters in length. Fossi...

Bumastus is an extinct genus of Silurian trilobites in the family Illaenidae. Its inflated, smooth exoskeleton has weakly expressed segmentation, producing a rounded profile that distinguishes it from more strongly furrowed trilobites. Species are known from marine rocks in North America and Europe,...

Acaste is a genus of phacopid trilobites that lived from the Silurian into the Devonian Period. Fossils are known from European marine deposits. The genus is recognized by its large schizochroal eyes, whose visual surfaces contain numerous individually lensed facets, and by the characteristic propor...

Coronocephalus is a genus of encrinurid trilobites from the Silurian Period. It is especially well known from China and other parts of East Asia. The species Coronocephalus rex has been used in regional biostratigraphic work, helping researchers compare the ages of Silurian sedimentary rocks. The ge...

Gravicalymene is a genus of calymenid trilobites from the Silurian Period. Fossils are known from Europe and North America, where they occur in marine sedimentary rocks. The genus has a strongly built exoskeleton, including a broad glabella, and many specimens are preserved enrolled, with the head a...

Homalonotus is a genus of trilobites known from Silurian and Devonian marine rocks. Its members had a relatively smooth, flattened exoskeleton and an elongated thorax, features that distinguish the genus from many more strongly ornamented trilobites. Homalonotus fossils are particularly associated w...

An Ordovician trilobite genus with a rounded, convex exoskeleton known from Paleozoic marine deposits, representing a minor element of early Paleozoic trilobite faunas.

The Helderberg Escarpment is a limestone escarpment in eastern New York State, southwest of Albany. It forms part of the eastern edge of the Catskill Plateau and exposes sedimentary rocks that record ancient marine environments, including strata of Silurian age. The escarpment is known for steep woo...

Silurian dalmanitid trilobite distributed across North America and Europe, recognized by schizochroal eyes and a spinose pygidial axis.

Symphysops is an extinct genus of trilobites in the family Cyclopygidae. It lived from the Middle to Upper Ordovician and has been reported from localities in Europe, North America, Asia, and North Africa, indicating a broad distribution. The genus is named for its fused eyes, which meet across the...

Ananaspis is an extinct genus of phacopid trilobites in the family Phacopidae, established by Campbell in 1967. It is known from Silurian marine strata, including the Henryhouse Formation of Oklahoma, Upper Silurian deposits in the East Baltic, and Silurian rocks of central Victoria in Australia. Th...

The Onondaga Escarpment is a limestone escarpment associated with the Onondaga Formation, a Middle Devonian rock unit exposed in parts of New York and Ontario. Resistant beds in this formation erode more slowly than adjacent rocks, producing a raised ridge and visible bands of bedrock. The exposed l...