There are four species codex entries on the Republic faction planet Tython. These codex entries are not required for any achievements. Zabrak is only available to Jedi Consulars and Jedi Knights, Flesh Raiders has a Jedi Consular and Jedi Knight specific location, and one accessible to all Republic classes.
A Flesh Raiders codex entry location obtained from a Flesh Raider Shaman.
Codex type: Species
Codex location: Tython
Codex coordinates: 394, -137
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: None
Complete List of Codex Providers
Bloodskin | Cha'nagh | Flesh Raider Berserker | Flesh Raider Bloodguard | Flesh Raider Boneguard | Flesh Raider Chief Shaman
Flesh Raider Chieftain | Flesh Raider High Shaman | Flesh Raider Jailer | Flesh Raider Mangler | Flesh Raider Shaman
Flesh Raider Slavemaster | Flesh Raider War Leader | Grand Chieftain Keshk | Mar'gavrok
The Flesh Raiders codex entry location obtained from a conversation.
Codex type: Species
Codex location: Tython
Codex coordinates: 200, -1173
Faction: Republic
Class: Jedi Consular - Jedi Knight
Associated Achievement: None
Special Requirements: You must progress the mission 'Early Lessons' to obtain this codex entry
The Togruta codex entry datapad.
Codex type: Species
Codex location: Tython: Jedi Temple: Level 2
Codex coordinates: -349, -550
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: None
The Twi'lek codex entry plaque.
Codex type: Species
Codex location: Tython
Codex coordinates: 125, -345
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: None
The Zabrak codex entry location obtained from a conversation.
Codex type: Species
Codex location: Tython: Chamber of Speech
Codex coordinates: -1030, 91
Faction: Republic
Class: Jedi Consular - Jedi Knight
Associated Achievement: None
Special Requirements: You must progress the mission '[HEROIC 2+] The Chamber of Speech' to obtain this codex entry