Reedsoceras
Reedsoceras is a genus of large discosorids ( Nautiloidea ) in the family Westonoceratidae from the middle and upper Ordovician of North America . 
<triplet> Reedsoceras <subj> Westonoceratidae <obj> parent taxon <triplet> Westonoceratidae <subj> discosorid <obj> parent taxon