ammonites
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Gordonites matheri Gordon, Jr. 1964 (ammonite)

Cephalopoda - Ammonoidea

PaleoDB taxon number: 299078

Full reference: M. Gordon, Jr. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322

Belongs to Gordonites according to M. Gordon 1964

Sister taxon: Gordonites filifer

Type specimen: USNM 119650, a shell

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell width 4.46, shell diameter 9.13