F111 Sample ID F111 • Cabinet M Albertella bosworthi 8.13cm W x 0.92cm H x 7.95cm D • 56g Sample TypeFossilFossil TypeAltered hard partsMohs Hardness 4 DomainEukaryotaKingdomAnimaliaPhylumArthropodaClassTrilobita OrderCorynexochidaFamilyZacanthoididaeGenusAlbertellaSpeciesbosworthi Distribution/PeriodWestern North America, Middle Cambrian HabitatMarine PreservationCast Orig. Material?NA ReliefPositive Relief Mineral Comp.Potentially limestone Smaller specimen, small head shield with two long backwards extended spines off the head shield. There are seven visible segments on the thorax that all face backwards and there are two large spines off the tail shield. Description of Mohs scale here