Trilobita - Phacopida - Pterygometopidae

Alternative combinations: Calliops divaricatus, Estoniops divaricatus

Belongs to Eomonorachus according to R. Ludvigsen 1978

See also Shaw 1974

Sister taxa: Eomonorachus buttsi, Eomonorachus goodridgii, Eomonorachus intermedius

Type specimen: OU 5209, an exoskeleton

Ecology: fast-moving low-level epifaunal carnivore

Distribution: found only at Bromide Formation, Pooleville Member Trilobites (Ordovician of Oklahoma)

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Specimen images are retrieved through the ePANDDA API.