There are 5 unique codex entries in the Species section on Belsavis. They are accessible to all players regardless of class or faction.
Anomid is obtained from killing an Anomid Targeter. It can also be obtained from killing Anomid Cyberwarrior, Anomid Degenerate, Anomid Electrocuter, Anomid Eliminator, Anomid Energizer, Anomid Executioner, Anomid Follower, Anomid Master Slayer, Anomid Murderer, Anomid Needler, Anomid Prisoner, Anomid Purifier, Anomid Scavenger, Anomid Slicer, Anomid Striker, Anomid Techslayer, Anomid Vivisectionist, Anomid Warrior, or Anomid Weaponeer on Belsavis.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Esh-kha is obtained from interacting with a Clickable Corpse.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Gen'Dai is obtained from killing a Gen'Dai Rioter. It can also be obtained from killing Gen'Dai Battlemaster, Gen'Dai Prisoner, Gen'Dai Warlord, or Gen'Dai Warrior on Belsavis.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Kaleesh is obtained from killing a Kaleesh Hunter. It can also be obtained from killing Conscripted Kaleesh Convict, Kaleesh Abesmi'jar, Kaleesh Bounty Hunter, Kaleesh Commander, Kaleesh Convict, Kaleesh Enforcer, Kaleesh Gangster, Kaleesh Lieutenant, Kaleesh Prisoner, or Kaleesh Warrior on Belsavis.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None
Trandoshan is obtained from killing a Trandoshan Escape. It can also be obtained from killing Trandoshan Assassin, Trandoshan Convict, Trandoshan Follower, Trandoshan Hunt-Shaman, Trandoshan Hunter, Trandoshan Jagga'Kornath, Trandoshan Jedi-Slayer, Trandoshan Marauder, Trandoshan Prisoner, Trandoshan Razer, Trandoshan Scout, Trandoshan Stalker, Trandoshan Tribesman, or Trandoshan Warmaster on Belsavis.
Codex type: Species | Faction: Both | Class: All
Associated Achievement: None