Question 1
Question 2
Question 4
Question 6
Question 21
Question 23
Question 24
Question 29
Question 32

33a. Caudal ramus slightly longer than wide, with prominent dorsal hook (dorsal, lateral).

Elaphoidella bidens

33b. Caudal ramus 2-3 times longer than wide, with dorsal ridge but not with hook (dorsal, lateral).

Elaphoidella subgracilis