| Fenestraspis Temporal range: Lower Devonian |
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|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Trilobita |
| Order: | Phacopida |
| Family: | Dalmanitidae |
| Genus: | Fenestraspis Braniša & Vanek, 1973 |
Fenestraspis is an extinct genus of trilobite in the order Phacopida from the Lower Devonian.[1] Fenestraspis is unusual because of the development of extensive fenestrae in the posterior part of the body and apparently of the thorax, the presence of upwardly directed spines on the cephalon, thorax and pygidium, and the exceptionally large and highly elevated eyes.[1]