Best Calymenidae
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An Ordovician trilobite abundant in the Cincinnati region of the USA, frequently preserved enrolled and found in great numbers in Ordovician limestones.
An Ordovician-Silurian calymenid trilobite abundant in South America and North Africa, commonly found in the enrolled position in Bolivian and Argentine strata.
A Silurian calymenid trilobite found in Europe and North America, distinguished by its robust, heavily calcified glabella and commonly preserved in enrolled posture.
An Ordovician trilobite common in Gondwanan shallow-water facies, with fossils found across Wales, Iberia, and North Africa, used as a Lower Ordovician index fossil.
Placoparia is an Ordovician trilobite genus from Europe, distinguished by its prominent eyes and relatively large, wide cephalon.
A Silurian calymenid trilobite widespread across North America and Europe, frequently preserved enrolled into a tight defensive ball in Silurian carbonate deposits.
A Paleozoic calymenid trilobite genus named in honor of the paleontologist Reed, recognized by the characteristic lobed glabella typical of calymenid trilobites.
