ditzy trilobite seamless pattern background. hand drawn arthropod ribbed shell marine fossils. monochrome white

trilobite seamless vector pattern ancient animal arthropod background color creature effect evolution extinct fossil fossilized graphic illustration jurassic marine mollusk museum nautilus ocean print repeat ribbed rock shape shell solidified style swirl underwater wallpaper wildlife travel education school cambrian period cretaceous paleozoic outline trilobita learning monochrome black white