The pterygiophore (the basal bone supporting the illicium) of Lasiognathus is unusually long amongst anglerfish, measuring some 85% of the standard length.
The pectoral fin lobe is small, short, and broad; the fin rays number 5 in the dorsal fin, 5 in the anal fin, 14-20 in the pectoral fins, and 9 in the caudal fin [REF].