30392 - Top Rare 0.46 Inch Alokistocare piochensis Middle Cambrian Trilobite - USA Asaphus kotlukovi Gold and arsenic occur as

Gold and arsenic occur as a coupled substitution in the pyrite structure

Middle Ordovician

†Reedops sp

Machairagnostus

deep subtidal ramp (6)

30392 - Top Rare 0.46 Inch Alokistocare piochensis Middle Cambrian Trilobite - USA Asaphus kotlukovi Gold and arsenic occur asAlokistocare piochensis, Walcott 1886 PaleoDB taxon number: 396032 Alternative combinations: Amecephalus piochensis, Liostracus piochensis, Ptychoparia piochensis Belongs to Alokistocare according to C. E. Resser 1935 See also Mason 1935 Sister taxa: Alokistocare alta, Alokistocare althea, Alokistocare charax, Alokistocare georgense, Alokistocare idahoense, Alokistocare laticaudum, Alokistocare nactum, Alokistocare natale, Alokistocare noduliferum,