F107 Sample ID F107 • Cabinet M Bathyuriscus rotundatus 8.61cm W x 1.29cm H x 6.28cm D • 72g Sample TypeFossilFossil TypeAltered hard partsMohs Hardness 4 DomainEukaryotaKingdomAnimaliaPhylumArthropodaClassTrilobita OrderCorynexochidaFamilyDolichometopidaeGenusBathyuriscusSpeciesrotundatus Distribution/PeriodNorth America, Middle Cambrian HabitatMarine PreservationCast Orig. Material?NA ReliefPositive Relief Mineral Comp.Potentially limestone Small Dark grey specimen, the head shield is large compared to the thorax and pygidium are smaller but very similar sized segments. The head shield spines are the largest and point backwards. Description of Mohs scale here