Olenus (trilobite)
| Olenus Temporal range: Upper Cambrian | |
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| Olenus micrurus from Trawsfynydd, N Wales, right free cheek displaced to left and turned 150°, pygidium missing | |
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| Genus: | Olenus Dalman, 1827 non Dejean, 1835 nomen nudum, ex Thomson, 1857 (= Trycherus, a beetle) |
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Olenus is a genus of Upper Cambrian ptychopariid trilobite.