| Illaenus tauricornis Temporal range:
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|---|---|
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| Illaenus tauricornis from Russia. On display at the Museo Civico di Storia Naturale di Milano | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | †Trilobita |
| Order: | †Corynexochida |
| Family: | †Illaenidae |
| Genus: | †Illaenus |
| Species: | †I. tauricornis
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| Binomial name | |
| †Illaenus tauricornis (Kutorga 1848)[1]
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Illaenus tauricornis is a species of trilobites from Russia and Morocco, from the middle Ordovician.