If your problems are anything like my problem during parasitology - (remembering all the specific orders/genus/species), I may be able to help ya.
For me, the issue was they all seem very abstract, ie.
Cooperia oncophora
Cooperia surnabada
Nematodirus helvetianus
Bunostomum phlebotum
Oesophagostomum radiatum
Ostertagia ostertagi
Haemonchus placei (barber pole worm)
Trichostrongylus axei
Trichostrongylus colubriformis
Cooperia curticei
Bunostomum trigonocephalum
Oesophagostomum columbianum
There were two tricks that I learned to help memorize them. A) Make them mean something if you can. Instead of writing them down like I did, break them apart into there roots (they almost always have roots, certainly in the genus). So instead of writing Oesophagostomum, write it as Oeso Phago Stomum. Then you can look up the etiology, in this case, I THINK its something like Esophageal Eating Mouth. Now, sometimes those etiologies help you remember something about it, sometimes it doesn't - but it still helps.
The last thing, is SAY THEM OUT LOUD. Go someplace private if you have to, but say the damn word dozens of times, over and over again. If you just say in mentally, i find it a lot harder to recall during an exam. Then practice writing them all down, in list format a few times.
Good luck to ya!