Cephalopoda - Goniatitida

Full reference: F. B. Plummer and G. Scott. 1937. Upper Paleozoic ammonites in Texas. The University of Texas Bulletin 3701:1-516

Parent taxon: Neoicoceratoidea according to W. M. Furnish et al. 2009

Sister taxa: Anuitidae, Aulacogastrioceratidae, Eupleuroceratidae, Neoicoceratidae, Paragastrioceratidae, Pericycloceratidae, Spirolegoceratidae

Subtaxa: Clinolobinae, Eothinitinae, Metalegoceratinae, Spirolegoceratinae

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Type: Metalegoceras

Ecology: fast-moving nektonic carnivore