Nileoides vs Asaphus
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Nileoides
Nileoides is an extinct genus of asaphid trilobites from the Ordovician Period. It is recorded from the Lower to Middle Ordovician and is placed in the family Asaphidae, although its relationships within the group have been discussed because its exoskeleton is strongly effaced, with many surface furrows reduced. The type species, Nileoides perkinsi, is known from the Upper Chazy Group of Vermont a...
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Asaphus
Asaphus is a genus of trilobite from the Ordovician period, belonging to the family Asaphidae, with fossils primarily found in the Baltic region including Russia, Estonia, and Sweden. Several species within the genus developed prominent stalked eyes, with Asaphus kowalewskii bearing eyestalks that can reach several centimeters in height. These elongated eyes are thought to have been an adaptation...
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