Bowlegga were a relative to the lineage that lead to Skozarius' sapient race, the Praazhm. That race, the Thornjetters (and by extension the Tuskflyer and the Stiltflyer), and the Bowlegga coincided peacefully for millions of years, though they eventually went extinct.
Sporepedia Description Edit
"Over many millennia, the ancient cellular forms eventually gave way to sea-dwelling organisms, and after that to land-dwelling descendants. Bowlegga was the first of its kind to live nearly all of its life on land. Cellular traits had begun to atrophy."