Xenosophonts (Alien Species) in the Orion's Arm Volume

The To'ul'hs The first alien race to be discovered by Humanity

Tohul Prime the surface is almost completely dark, except when lightning briefly illuminates the landscape Image from Luke Campbell"> Image from Luke Campbell

Beneath the thick clouds of Tohul Prime the surface is almost completely dark, except when lightning briefly illuminates the landscape

The Cthonids

Image from Luke Campbell

A mud-dwelling, subterranean race with mobile accessory bodies

The Silent Ones

Image from Steve Bowers

A secretive but advanced race confined to a single planetary system

The Thyresta, an extinct species

Image from Juhomatti Männistö

These creatures wiped themselves out in a nuclear war 3.6 million years ago

The Meistersingers

Image from Steve Bowers

A Meistersinger individual together with some members of its choir.

The Wayfarers

Image from Chris Shaeffer

An amphibious species associated with the Meistersingers

Hildemar's Knots

Image from Anders Sandberg

A species living on the surface of certain neutron stars

The Muuh

Image from Steve Bowers

A cold temperature slow-living species, with an ancient, decaying empire

The Soft Ones

Image from Keith Wigdor

A cold-temperature, singlecelled macroscale intelligent species

Kammerer Joker Leaf-ants

Image from Steve Bowers

Whisperweed

Image from Steve Bowers

A planet covered in an intelligent grassland xenoecology

The Iahi Daon

Image from Aaron Hamilton

A long extinct species (reconstruction)

• Garden Worlds
• Xenobiochemistry
• Xenobiologist
• Xenobiont
• Xenobiota - Text by M. Alan Kazlev
  The totality of non-terragen life on a specific planet or non-terragen ecosystem.
  
• Xenologist
• Xenomorph - Text by Steve Bowers
  Any Terragen entity using an artificial alien (xenosophont) body for the purposes of cultural contact, exploration or colonisation.
  
• Xenophotosynthesis