Trachipteridae, Swainson, 1839

Martin, Jennifer M. & Hilton, Eric J., 2021, A taxonomic review of the family Trachipteridae (Acanthomorpha: Lampridiformes), with an emphasis on taxa distributed in the western Pacific Ocean, Zootaxa 5039 (3), pp. 301-351 : 306

Key to the Genera of Family Trachipteridae

1 Caudal fin without two lobes, caudal-fin rays running parallel to the long axis of the body; ventral body margin is smooth with no spiny lateral-line plates or bony tubercles....................................................... Desmodema

- Caudal fin with two lobes, fin rays on the dorsal lobe set at a steep angle oriented dorsally relative to the long axis of the body, ventral caudal rays elongate in juveniles, reduced to bases in adults; ventral edge of caudal region with spiny lateral-line plates or bony tubercles..................................................................................... 2

2 Lateral line runs in a zigzag pattern as an alternating series of spiny plates along the ventral edge of the caudal region; ventral body margin without bony tubercles..................................................................... Zu

- Lateral line runs straight, well above the ventral edge of the caudal region; ventral body margin with bony tubercles.................................................................................................. Trachipterus