Harpides vs Lichas
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Harpides
Harpides is an extinct genus of harpetid trilobites recorded from Cambrian and Ordovician marine rocks. It is distinguished by a broad cephalic fringe extending around the head shield, with a pitted surface that recalls the better-known genus Harpes. The genus is relevant to studies of harpetid diversity and the evolution of specialized trilobite head structures in early Palaeozoic seas.
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Lichas
Lichas is a trilobite genus ranging from the Ordovician to the Devonian and serves as the type genus of the order Lichida. Members are recognized for a strongly sculpted exoskeleton, numerous tubercles, and a complex glabella that gives the cephalon a highly ornamented appearance. The genus is suited to collectors and students interested in ornate Paleozoic trilobites, lichid morphology, and the l...
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