| Name |
Source |
Type
|
| Raas |
Master of Orion III |
|
| Rabotevs |
Harry Turtledove's Worldwar book series |
A subject species of the Race in the Worldwar book series
|
| The Race |
Moreau series |
Amoeboid
|
| The Race |
Harry Turtledove's Worldwar book series |
Reptilian, often called "Lizards" by humans due to their appearance.
|
| Rachni |
Mass Effect |
|
| Radicles
|
OK K.O.! Let's Be Heroes
|
|
| Raiel |
Peter F. Hamilton's Pandora's Star |
|
| Rako-Gorda |
Utopia |
|
| Ram Pythons |
Battlelords of the 23rd Century |
|
| Rancors |
Star Wars |
|
| Raptors |
Nexus: The Jupiter Incident |
|
| Raxacoricofallapatorians |
Doctor Who |
|
| Reapers |
Doctor Who |
|
| Reapers |
Mass Effect |
|
| Reapers |
X-COM: UFO Defense |
|
| Regul |
C. J. Cherryh's Alliance-Union universe |
|
| Relgarians |
Farscape |
Humanoid
|
| Remans |
Star Trek |
Humanoid
|
| Re'ol |
Stargate SG-1 |
Humanoid
|
| Replicators |
Stargate SG-1 |
Artificial lifeform. Two variants are known to exist, in a small mechanical insect shape as well as full humanoid.
|
| Re'tu |
Stargate SG-1 |
|
| Rigellians |
Lensman books |
Barrel-shaped with four tentacular arms and four stubby legs
|
| Rigellians (including Kang and Kodos) |
The Simpsons |
|
| Riim |
The Voyage of the Space Beagle by A. E. van Vogt |
|
| Rills |
Doctor Who |
|
| Rimerunner |
Expedition |
|
| Rimmer |
Red Dwarf |
Hologram-humanoid
|
| Risians |
Star Trek |
Risians are extremely open and will freely share their planet, and even themselves, with vacationers – a practice known as "Jamaharon".
|
| Robotech Masters |
Robotech |
|
| Rodians |
Star Wars |
|
| Roger the Alien |
American Dad! |
|
| Rogue Simulants |
Red Dwarf |
Humanoid
|
| Romulans |
Star Trek |
Humanoid
|
| Rull |
The War against the Rull by A. E. van Vogt |
|
| Rutans |
Doctor Who |
|
| Ryouko Asakura |
The Melancholy of Haruhi Suzumiya |
Humanoid interface
|
| Ryqril |
Timothy Zahn's The Blackcollar |
|
