In the Forth World/Earthdawn three additional races were present, Windlings, Obsidimen and T'skrang.
I know that Windlings have been widely regarded as Pixies but have the other two races appeared in canon in Shadowrun at all?
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Evo share holder Hideo Yoshida may be an obsidiman.
No t'skrangs have been reported in the Sixth World (Shadowrun).
I've found this wikia site rather reliable so far - but, of course, I might be wrong, and other answers may provide more up to date and more precise information.