Urakawites [SEP] parent taxon
Urakawites
Urakawites is an extinct Ammonite from the Upper Cretaceous (Campanian) of Japan, Sakhalin, Russia, British Columbia, Canada and possibly Germany and Angola. "Urakawites" is placed in the family is Pachydiscidae.
"Urakawites" is characterized by a bituberculate (meaning it has two rows of tubercles on either side), strongly ribbed, moderately compressed shell.
References.
- Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology Part L. Geol Soc of America and Univ Kansas
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