1. Tentacles
   1. Tentacular clubs with enlarged suckers that bear one or two large, central, hook-like teeth.*
   2. Distal 2/3 of tentacular stalk with two series of suckers and pads.
   3. Terminal pad on club with 2-3 suckers separated from dactylus suckers by narrow "neck."
      
   

   Figure. Oral view of the tentacular club of T. pavo, 198 mm ML. Drawing from Voss (1980, p. 391, fig. 8e).

2. Head
   1. Eyes large, bulge from head, anteriorly oriented.
      
      
3. Funnel
   1. Funnel valve absent.
   2. Funnel organ: Dorsal pad with three round, fat papillae.
      
      
4. Mantle
   1. Tubercles absent at funnel-mantle fusion (single tubercle may be present in young).
      

      Figure. Ventral view of the eye of a subadult T. pavo, 539 mm ML, showing photophores. Drawing from Voss (1980, p. 391, fig. 8d).

      
      
      
5. Fins
   1. Terminal, lanceolate, very long and narrow; anterior insertion on gladius.
      
      
6. Photophores
   1. Two ocular photophores: Medial photophore large, crescent-shaped; lateral photophore small, crescent-shaped within concavity of first.
   2. Arm tip photophores absent.

*Unique in family.

Comments

Characteristics are from Voss (1980).