Chaetocorophium [SEP] parent taxon
Chaetocorophium
Chaetocorophium is a monotypic genus of amphipods in the family Corophiidae, containing only the species Chaetocorophium lucasi. "Chaetocorophium" is very closely related to "Paracorophium", and some researchers propose synonymising the two genera.
"C. lucasi" is endemic to New Zealand, where it is found only in a few sites in the North Island (Lake Rotorua, Lake Waikare, Lake Rotoiti, at Whakatane, Raglan, Waitara, and Wanganui) and in lakes and intertidal mudflats across South Island. It is epigean,
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