Agonostomus [SEP] parent taxon
Agonostomus
Agonostomus is a genus of fish in the family Mugilidae, the mullets.
These are considered to be the most primitive of the mullets. They are generally marine fish, though they spend much of their adult lives in freshwater. The two members of the genus occur in the Indian Ocean.
Species.
There are currently two recognized species in this genus:
- "Agonostomus catalai" – Comoro mullet
- "Agonostomus telfairii" – fairy mullet
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