Key to the medusae of Hybocodon

1. Without tentacle ..................................................................................... H. atentaculatus

­ With a well­developed tentacle .................................................................................... 2

2. With nematocyst tracks on exumbrella ........................................................................ 3

­ Without nematocyst tracks on exumbrella ................................................................... 6

3. With medusa buds ......................................................................................... H. prolifer

­ Without medusa buds ................................................................................................... 4

4. With 8 nematocyst tracks ....................................................................... H. octopleurus

­ With 5 nematocyst tracks .............................................................................................. 5

5. Tentacle bulb moderately enlarged.............................................................. H. pendulus

­ Tentacle bulb between two large swellings................................................. H. chilensis

6. Tentacle bulb bean­shaped ............................................................................ H. cryptus

­ Tentacle bulb between two large swellings..................................................... H. unicus