xenopterygii

from The Century Dictionary.

• noun A suborder of teleocephalous fishes, represented by the family Gobiesocidæ, and characterized by the development of a complicated suctorial organ in the pectoral region.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A suborder of fishes including Gobiesox and allied genera. These fishes have soft-rayed fins, and a ventral sucker supported in front by the pectoral fins. They are destitute of scales.