Best Trilobite

Isotelus maximus is a large asaphid trilobite species that lived during the Late Ordovician and is known from rocks in eastern North America. Its broad, flattened exoskeleton consists of a semicircular head, a segmented thorax, and a large tail shield, while some specimens exceed 70 centimeters in l...

Eldredgeops is a genus of phacopid trilobites known chiefly from Middle Devonian rocks in eastern and central North America. Like related phacopids, it had large schizochroal compound eyes, a strongly vaulted exoskeleton, and the ability to enroll for protection. The genus was named for paleontologi...

Cyclopyge is a genus of trilobites from the Ordovician Period, recognized by exceptionally large compound eyes occupying much of the sides of the cephalon. It belonged to a group commonly interpreted as pelagic or deep-water trilobites rather than animals confined to the seafloor. The enlarged visua...

Drotops megalomanicus is a large phacopid trilobite from Lower Devonian marine deposits in Morocco. It is distinguished by a broad, strongly vaulted exoskeleton, prominent compound eyes, and a surface covered with conspicuous tubercles. Complete specimens can reach roughly 15 centimeters or more, ma...

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...

Terataspis grandis is a species of lichid trilobite from Devonian rocks in what is now New York State. It is known primarily from incomplete remains, including unusually large portions of the exoskeleton, so estimates of its full body length are necessarily uncertain. Reconstructions based on those...

Walliserops trifurcatus is a Devonian trilobite discovered in Morocco. This iconic fossil is notable for its exceptionally long, three-pronged rostral spine—a feature characteristic of the odontopleuride group. Its complex cranial structure provides valuable insight into trilobite evolution and is p...

Erbenochile is a Devonian trilobite discovered in Morocco. This fossil is notable due to its exceptionally large, tower-like schizochroal eyes, which afforded it near panoramic vision. The structure represents the phacopida group and offers valuable insight into the visual capabilities of early arth...

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...

Drotops is a genus of phacopid trilobites from Devonian marine rocks of what is now Morocco. Specimens are recognized by a broad cephalon, a strongly segmented thorax, prominent compound eyes of the schizochroal type, and an ability to enroll for protection. Some species attained comparatively large...

Erbenochile erbeni is a Devonian-era trilobite discovered in Morocco. It’s notable for possessing exceptionally large, hypertrophied eyes—the tallest “tower-eyes” and widest visual field among known phacopids. This fossil offers insights into the evolution of complex vision in ancient marine inverte...

The Walliserops is a remarkable Devonian trilobite fossil discovered in Morocco. It’s notable for its exceptionally long, trident-like spine projecting from its head shield. Belonging to the odontopleurida group, this specimen provides valuable insight into the evolution and diversity of early arthr...

Terataspis is a genus of lichid trilobite known from Devonian rocks in North America, especially from incomplete exoskeletal remains. Like other lichids, it possessed a strongly ornamented calcified exoskeleton, with prominent spines extending from parts of the head, thorax, and tail shield. Reconst...

Carolinites is a genus of Ordovician trilobite characterized by very large compound eyes that provided a broad field of vision. Its remains occur in geographically widespread marine deposits, a distribution commonly interpreted as evidence that it lived in the open water column rather than remaining...

Phacops rana is an iconic Devonian trilobite found primarily in eastern North America. Its exceptionally large, compound eyes are notable for their detailed structure and played a key role in paleontological research. The species was extensively studied by Niles Eldredge, contributing to the develop...

Uralichas is a genus of large lichid trilobites known from Ordovician rocks of the Iberian Peninsula and nearby regions. Some attributed specimens exceed 60 centimeters in length, placing the genus among the largest trilobites documented in the fossil record. Its strongly segmented exoskeleton and i...

Elrathia kingi is a common trilobite fossil discovered primarily in the Middle Cambrian Wheeler Shale of Utah. It represents one of the most abundant trilobite species globally. These ptychopariida fossils are notable for their distinctive, deeply furrowed exoskeletons and widespread commercial avai...

Neoasaphus is a type of trilobite fossil belonging to the Asaphida order and Asaphidae family. Primarily found in Ordovician deposits of Russia, particularly within the Baltic region, it’s notable for exceptionally well-preserved eyes. These eyes, often encased in three-dimensional calcite, reveal e...

Dicranurus represents a significant Devonian trilobite genus characterized by distinctive, branching horns projecting from its cephalon. Fossils discovered primarily in Moroccan sedimentary rocks provide valuable insight into odontopleurid trilobites during this ancient period. The species’ unique m...

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...

Isotelus rex is a remarkably large species of trilobite belonging to the Asaphida order. Recovered from Ordovician-age rocks in Manitoba, Canada, it represents the largest complete trilobite fossil ever discovered reaching approximately 72 centimeters in length. This specimen provides crucial insigh...

Middle Cambrian trilobite widespread across Baltica and Avalonia, widely used as a biostratigraphic index fossil for the middle Cambrian Series 3.

Hollardops is a genus of phacopid trilobites known from Devonian marine rocks in Morocco, particularly deposits exposed in the Anti-Atlas region. Like other phacopids, it possessed prominent schizochroal compound eyes in which relatively large lenses were individually separated. Complete specimens a...

Olenoides serratus is an iconic trilobite species dating back to the Cambrian period. Found within the Burgess Shale of British Columbia, it’s notable for remarkably well-preserved anatomical details, specifically its distinctive serrated body and biramous appendages. These structures offer crucial...

Neoasaphus kowalewskii is a fossil trilobite discovered in Russia’s Ordovician deposits. This species is notable for its exceptionally long stalks supporting its eyes, a unique feature among trilobites. Its stalked-eyes provide valuable insight into the sensory capabilities of asaphid arthropods dur...

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...

Comura is a Devonian-era trilobite discovered in Morocco. It’s notable for its exceptionally elongated spines extending from both its thorax and tail shield, characteristics defining its Lichida family lineage. These unique features make Comura specimens highly sought after by paleontologists and fo...

A Devonian cheirurid trilobite from Morocco, distinguished by segmented genal spines resembling a rattlesnake's rattle, earning it the popular name 'rattlesnake trilobite.'

Nevadella is a genus of olenellid trilobites from the Early Cambrian of western North America. Fossils assigned to the genus are used in regional biostratigraphy because their occurrence helps paleontologists correlate rock layers of similar age. Like other olenellids, Nevadella had a broad cephalon...