I think I remember reading this somewhere about a year ago, though I could never find the source again.

I know that Jedion357 has theorized that the Vrusk homeworld should be in Fromeltar, though I've never warmed up to that idea though I like the system and planetary names that he came up with.

At http://www.starfrontiers.us/node/5486 there was a thread by thespiritcoyote about the origins of the Core Four races:

I really like this idea; some spouted not-all-that-radical thoughts:
   Somewhere in the materials I had gathered the following information (no-canonisity ensured) about the surrounding sectors... Though I have questions about the exact orientation of the map...
   roughly:
   East (counter spin-ward): Past the White Light/Xygyg Gap there is a region of "relatively" empty space, I think described as being about a sector and a half wide (nearly 200ly or more)... something near a week to cross in a straight shot, and therefore not traversable by Frontier FTL. 
   West (spin-ward): The Coalition Rim runs from Yazirian space to the end of the Xygyg Run (North) but isn't more than a sector wide, likely only 60LY, beyond that I call the rest of the sector the Capellan Trade Periphery (If CFM supporter), or the Far Trade Stretch (If TT supporter), and just Far-Rim Periphery for everyone else... I got the impression that this region has it's own local cluster of stars, several unmentioned trade-partnerships with the CFM, and some leap-frogging outposts by Frontier Authorities and Corporations.
   South (rim-ward): The PanGal corporation was supposedly heavily exploring this area with near exclusive charter for awhile, having friendly competition with only the Yazirians, until it opened (or became impossible to prevent claim jumping) to independent explorers...  while the Pan Gal has more influence over the Vast Expanse than any other organization, the side beyond liberty is heavier in Star-Law influence and independent Expanse Explorers... (Sometimes derogatorily referenced as Vast Exploiters), this sector (perhaps two sectors) is not home to a cluster but still more populous than the counter spin-ward Dark Gap. Like the Dark Gap, the gal-political reference of the name Vast Expanse Region (or just Vast Expanse) may actually cover several Physical Sectors of Measurement*, in size and scope.
   North (core-ward): The most unexplored sector known to the frontier, only recently opened to exploration by frontier organizations under tight restrictions in the last half-century or so, even the Ifshnit have had few routes charted across this sector over the last couple centuries or more (they still had a large head start on the frontier)

*I base this statement on the idea of 60 to 120LY standard measurement sectors, such as the 100LY sector grid map, or the hex maps in the library meant to be used in parsecs...

The Frontier Sector Region should have well over 2000 stars, The areas Southwest and West at least that many each, Southeast and East no more than half that in total between them, North might have about as many... a total around nine or ten thousand stellar systems.
A Comparison: Crowded Cluster, Sparse Association
For F, G, K, stars (quick math here) would make up about 900 stars within the Frontier Reach Region (all the combined sectors within the Frontier Civilization's Influence Sphere, aprox. 400LY centered on Prenglar), a few hundred of those would be in the inner nebula of the Frontier Sector itself.
   I base all this off the assumption that even the flat map left unaltered, exists in a three dimensional universe.

  All of this means that it could be laid directly on top of the frontier circa 1k years previous to the Core Four Appearance, and still use a completely different map, with only the nebulae, black holes, and neutrons keeping some relative similarity of positioning...

  As far as adding humans, I wouldn't make it a viable colony of 'true human', as I am not that human centric with my rpg's, near-human would be adequate to satisfy a baseline benchmark race for me...  I like all alien game settings, personally. I can understand if others would want the option, and wouldn't have a problem with a small unimportant population of inconsequential humans, 9 to 10 feet (2.7 to 3.0 m) tall, having pairs of large orange, purple or dark-green eyes, pointed and mobile ears, arms, legs four fingered hands and feet, three six foot prehensile tails extending from the nape of their neck, and a pair of two foot long antenna sprouted from the temples, as well as a feline nose, a mouth, red and black, orange and brown, or blue and black striped hair, simple recognizable expressions, three ethnic skin pigmentation's yellow, green, and blue, two gamete genders, and a basic male-provider and female-brooder reproduction strategy.
  Game system mechanic is identical to Human in all respects. They even have only three languages, Auslish, Amerilish, and Brilish...

Placing the Vrusk in the Frontier may help clear up some things, but it may also cause problems. For example, why is Zik-kit a colony of Terledrom?

But if we are into alternative timelines... which we are... why not alter a few other things? Game referees have that option.

It would also nix the K'aken-Kar system brief that appeared in Star Frontiersman Issue 23. 

Rastipedes appear to be an older form of the Vrusk as they still have "queens" but clearly are related to the SF Vrusk... notes pulled from multiple sources over on my Insectoid thread.
Other than the queen of each nest, there are no obvious differences between rastipedes of different gender.
The rastipede is an insect-like creature. A rastipede has a hard shell covering its body. Rastipedes have long lower bodies. Their eight legs enable them to scoot around very quickly. They also have a vaguely humanoid torso and one pair of arms. The rastipede has a pair of antennae on its head that provide it with a very keen sense of smell. This sense is so keen that the rastipede cannot be surprised by a creature behind it, as long as that creature exudes any odor whatsoever. Also, the rastipede is ambidextrous and fully double-jointed.
They are born from eggs, which are laid by a queen that reputedly lives deep within ground in a secluded cavern, wherever they creatures have nests. Rastipedes grow up with a strong sense of duty and responsibility to the nest and the community. AIl rastipedes are well taught in the literature of their own race, which is quite extensive, and mathematics.
The primary interest of rastipedes, however, is trade. They commonly employ crews and hire ships to transport goods back and forth across space, usually turning a profit with every voyage. Rastipedes engage in selling and buying of virtually any product, though most of them adhere rigidly to laws against smuggling or slave trafficking.
Rastipedes can survive on virtually any kind of food. They need lots of water, but sunlight is apparently not a requirement of the race. Young rastipedes, born in the nest, might spend their first decade underground.
Rastipedes are inherently peaceful and avoid combat whenever possible—their great movement rate allows them to avoid many unpleasant encounters. However, they are not cowardly. They can, and do, use the full range of weapons usable by humans. They attempt to keep enemies at range. When combat gets to melee range, their hard chitinous armor allows them to make attacks with their claws.


Rastipedes are favored henchmen of an ancient race called the arcane (ancients? tetrarchs?). Very often, characters who seek an arcane find themselves dealing with a rastipede go-between. One reason for this is the well known bargaining skill of the rastipedes. Rumors suggest a darker, more sinister connection between the two races, but there is no evidence to indicate that any such association exists.
Rastipede lands are filled with underground caverns, many of which have been dug out by the rastipedes themselves. The lands surrounding caverns must be able to support some life which the rastipedes gather much of their substance. Within their caverns they harvest giant aphids and mushrooms.
Rastipedes worship gods of insects, merchants, travel, and industry. 
The written version of their tongue has many special characters that when a “tilde” is added to it becomes a number. Such extra strokes or even a single stroke, either above or below a letter can change a meaning of sentence.
Rastipedes earn names that are indicative of their productivity to the nest. Such names are more a matter of status. Rastipedes can also earn names due to important jobs they do such as forager (gathers food) or bloodspiller (defends the nest from dangerous threats). To these names of status or positions all rastipedes carry the nest name, which seem to be used only when rastipedes meet other rastipedes from another nest.
Names of Nests: Aphidgarden, Goldhill, Water Raiders, are but a few names that rastipedes carry as their nest name.
As a species, rastipedes arose on Nchak, the “Hive Moon” of the gas giant Liavara. 
The rastipedes themselves rule the small but wealthy nation-state of Vrusk, under the protection of the moon’s immortal Forever Queen but largely independent in its day-to-day affairs. 
Vrusk is ruled by a consortium of trade houses, combinations of guilds and noble houses, and each rastipede is born into its hive’s trade house. All rastipedes regardless of station are afforded thorough education, a fact that makes them indispensable to the rest of their moon’s inhabitants as scholars, mages, lawyers, accountants, tradespeople, and other skilled professionals. 
The Forever Queen of Nchak is a giant psychic insectoid goddess/queen-bug from the hive moon of Nchak. It's a moon that orbits the gas giant Liavara.
I found references to the concept of "Mother Hive" placed amongst the planes as a religious concept/god on forums... also found a reference to a god of war Kilkral whose followers get into with the Hive Mother followers... Kilkrals followers loose.
Nchak has other intelligent insect races on it... Nchak is a moon visited by a spaceship (Divinity) that crashes finally on another world... Golarion.
Philosopher worms and other creatures subservient to the Forever Queen

Okay based on the general notes I have collected on Rastipedes, this is the older root race of the Vrusk, the word "Vrusk" for their nation-state is a dead give away.