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Intelligent Lifeform Index

Four Letter Code ILLY
Federation Status Neutral
Planet of Origin Illyria
Encountered 2154 = ENT: Damage
Current Tech Level N
List of Named Illyrians

Full ILI GalleryPermitted Species Gallery

"Beware the good will of others, it may conceal a bitter truth."
a Illyrian proverb.
The Illyrian are a species of intelligent humanoids who have learned to distrust most other species. They are cautious and unwilling to take risks in regards to their interaction with other species unless they feel that they have something to gain.

Home System

  • Quadrant: Beta
  • Location: Mais Blas Sector (coordinates B24-0002-1302)
  • Proper Name: Lyria system
  • Star: It orbits a class B (Blue/White) star
  • Distance from Star: its orbit is approximately 324 million km
  • Companions: It is the 4th of 9 planets in the system
  • Moons: It has 1 massive moon, 2 medium moons and 6 tiny moons of which the smallest 1 circles the massive moon

Home World

  • Proper Name: Illyria
  • Diameter: 15,918 km (9,891 miles)
  • Gravity: 0.97 standard gravity with a density of 4.3
  • Axial Tilt: 12.1%, with normal seasonal changes
  • Orbital Period: 401 days
  • Rotational Period: 26.2 hours
  • Classification: M
    • Surface Water: 62%
    • Atmosphere: 0.96% is a standard pressure with 73% nitrogen, 24% oxygen, 3% trace chemicals
    • Climate: Mainly a temperate planet.
    • Terrain: Numerous swamps, lakes, rolling plains and mountain ranges
    • Population: Just over 12 billion with another 3 billion off world on colonies


In 2154, the badly-damaged NX-class Starfleet vessel Enterprise encountered a damaged Illyrian starship in the Delphic Expanse. The Illyrian starship was damaged by the spatial distortions of the Expanse while studying a red giant. The distortions caused damage to the ship's engines and life support.

Captain Jonathan Archer asked the Illyrian ship's captain for his warp coil in exchange for food and supplies. The captain refused, as the loss of their warp coil would leave them with a three year journey to their homeworld – a journey for which his ship was not equipped. As Enterprise required the warp coil in order to continue their mission to find and destroy the Xindi weapon before it destroyed Earth, Archer was forced to take an away team aboard the Illyrian starship and steal the coil.

Aboard the Illyrian ship, the Enterprise crewmembers encountered a force field surrounding the warp coil. It was only after T’Pol had Enterprise's phase cannons disable the ship's power junction that was supplying power to the force field, that the force field was eliminated, allowing Captain Johnathan Archer and the MACOs to board the Illyrian craft and steal their warp coil.

Before leaving the Illyrian ship, Archer had Enterprise transport food, supplies, and three containers of trellium to the Illyrians' cargo hold to assist them in their three-year journey back to their homeworld.

As a result of this incident it was a long time before any contact of any kind was established between them and the Federation. However contact was finally established and after almost 60 years trade was established with them.


They have an elected council with 11 members who each serve for 11 years. Each year one member of the council will be replaced.


They appear to be typical humanoids with two arms, legs, eyes etc. They vary in size, height, weight and body types. However they all tend to have short brown to dark brown hair. That of the females tends to be a little longer and is usually tied back in a ponytail. They have 2 V shaped ridges that start at their nose and travel up their foreheads into their hair line with tends to be high up on their foreheads. Normally one of these ridges is more noticeable and pronounced than the other.


As with most intelligent humanoid species they have a very complex system with specialized organs, and unique hormones, chemicals and enzymes. They are typical humanoids with most of the physical, mental and biological medical problems that seem to plague most humanoids.


Based on the limited data files available they have a basic understanding and a rudimentary treatment and care system for those members of their society who suffer from various different types of mental health issues. For the most part those with minor issues are eventually able to return to society but those with more complex issues usually spend years or even all of their life within special care facilities.


They have a simple belief in the duality of the universe itself. All things were created with a purpose, the mystery is what that purpose may be.


While they do have a number of interesting and simplistic tales regarding various aspects of their primitive past, most of these are now reserved as part of their ancient history lessons only.


They have a very well structured society with adequate infrastructure in most communities, an efficient if outdated system of mass transit and plenty of recreational and cultural facilities, however their judicial system is very black and white with very strict, often draconian punishments up to and including death.


They have a well-developed interest in many different styles and types of artistic expression. This has grown to now include many examples created by other species from a wide flung universe of worlds.


Showing respect to ones elder, superior and employer is a fundamental aspect of their entire culture. Learning that most aliens do not observe the same kind of code was both a big shock and a great disappointment.


Illyrian starship

The Illyrian starship was a class of starship utilized by the Illyrians during the mid-22nd century. This class of vessel was equipped with a minimal armament of particle weapons and was tactically inferior to an NX-class starship. This class was also notable for having its primary warp coil, which was tied into the ship's injector system, protected by a force field.


In the last 50 to 100 years trade with species that are members of the Federation slowly increased. So much so that it eventually had a positive effect on the overall attitude of the Illyrian people to the Federation as a whole.

As expected this resulted in an increase in trade and the formation of more long and short term trade deals. The end result was an improvement in the overall quality of life for many of their people.


As a result of the negative contact with the Enterprise they greatly expanded and improved on their military fleet. However over time as the Federation expanded and grew in size, they slowly reduced that fleet. The obvious evidence that the Federation was not militaristic or expansionistic with no plans to conquer them were key factors in this decision.

Most experts believe that an even greater reason was the fact that their homeworld was now deep within that area of space claimed and controlled by the Federation. Making it strategically difficult if not improbable that they would ever have to worry about invasion or attack by hostile forces.

Federation Intelligence Files

The first meeting between this species and the crew of the Enterprise ended badly. As a result once they had managed to make the long trip home and reported what had occurred it resulted in strained and often negative contact with any and all Federation personnel.

It was only within the last 70 years that friendly commerce and meetings replaced the strained and often difficult encounters that had precede them.


Both Memory Alpha and Memory Beta were used as references as well as the following TV episode, ENT: Damaged.

Content from this article may have
come partially, or entirely from
Memory Alpha

This profile was revised by the Species Development Committee.
REV 239306.27
Please add any new information discovered during the course of a mission or shore leave.