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Genus:Triarthrus

FHSM IP-421
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-422
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-423
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-424
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-425-1
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-425-2
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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FHSM IP-425-3
Triarthrus spinosus (Billings, 1857)
Formation: Gloucester
Period(Early): Ordovician

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