Taxonomic history and definition
The order Scombriformes was originally established in 1859 by the Dutch physician and ichthyologist Pieter Bleeker. However, the taxa assigned to this group were later placed within the order Perciformes, specifically in the suborder Scombroidei (mackerel-like fishes).
With the advent of cladistics and DNA comparison methods for phylogenetic analysis, it became evident that the traditional Scombroidei was not a monophyletic group (a natural clade). [6] Consequently, an attempt by E. O. Wiley and G. David Johnson to remove Scombroidei from Perciformes and elevate it to the order Scombriformes did not result in a monophyletic order, as it did not account for emerging DNA evidence regarding relationships among percomorphs. [7]
In a 2013 revision of bony fish systematics by Ricardo Betancur-R and colleagues, Scombriformes was redefined with a new composition, comprising 16 families that had previously been assigned to six different suborders of Perciformes. [3] This relationship was subsequently confirmed by Thomas J. Near and colleagues in their phylogenetic study of Acanthomorpha. [8]
In mid-2013, Masaki Miya, Matt Friedman, and colleagues described a clade with the same composition under the new name **Pelagia**, referencing the fact that these are predominantly pelagic fishes inhabiting the open ocean. [9]
Miya and Friedman defined Pelagia as a node-based taxon comprising the most recent common ancestor of the following species and all its descendants: [9]
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