title: A Devonian trilobite with an eyeshade.
mesh_terms: D000818:Animals; D001181:Arthropods / Q000033:anatomy & histology* / Q000502:physiology; D005123:Eye / Q000033:anatomy & histology; D005580:Fossils; D007908:Lens, Crystalline / Q000033:anatomy & histology; D009018:Morocco; D014785:Vision, Ocular