Key: Step 18. eleven

Lappet is forward-directed, pectinate leaflet with 10-15 teeth. Mesopelagic; tropical subtropical regions. Adult TL, 29-44 mm. Thysanopoda pectinata

Thysanopoda pectinata

Lappet extends horizontally over segment 2 as simple, distally triangular process.

Step 20. twelve
Decision path