Dimeroceratoidea [SEP] parent taxon
Dimeroceratoidea
Dimeroceratoidea, formerly Dimerocerataceae, is one of six superfamilies in the gonititid suborder Tornoceratina which lived During the Devonian. Five families are included, the Dimeroceratidae being the type family.
Gonitites, to which they belong, are primitive ammonites "sensu lato", extinct shelled cephalopods more closely related to living animals like squids and octopodes than to similarly shelled nautiloids such as the modern genus "Nautilus".
References.
- Taxonomy GONIAT-online 10/28/10
- Paleobiology Database - Dimerocerataceae 10/28/10
- Saunders, Work
Taxon in disguise
In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade.
While the term is from bacteriology, parallel examples are found throughout the tree of