List of Synapomorphies
- Spinous dorsal fin primitively of six spines, the anteriormost three of which are cephalic in position and modified to serve as a luring apparatus
- Epiotics separated from parietals and meeting on the midline posterior to the supraoccipital
- Gill opening restricted to a small, elongate, tube-like opening adjacent to pectoral-fin base
- A single hypural plate emanating from a single complex half-centrum
- Ventralmost pectoral radial considerably expanded distally
- Eggs spawned in a double scroll-shaped mucous sheath
- Posteromedial process of vomer emerging from ventral surface as a laterally compressed, keel-like structure
- Postmaxillary process of premaxilla spatulate
- Opercle reduced
- Ectopterygoid triradiate
- Proximal end of hypobranchials II and III bifurcate
- Interhyal with a medial, posterolaterally directed process
- Illicial pterygiophore and pterygiophore of third dorsal spine with highly compressed, blade-like dorsal expansions
- Eggs and larvae small
- Head of larvae large relative to body
- Number of dorsal-fin spines reduced
- Loss of pharyngobranchial IV
- Second dorsal spine reduced and embedded beneath skin of head
- Gill filaments of gill arch I absent
- Second dorsal spine reduced to a small remnant
- Third dorsal spine and pterygiophore absent
- Epibranchial I simple, without ligamentous connection to epibranchial II
- Posttemporal fused to cranium.
