Board Thread:Warhammer 40k General Discussion/@comment-8881468-20131229020408/@comment-6078851-20140104144205

.....which some tech priests believe may have evolved.....

that isn't proof in any way. at the very best, given how little the imperium knows of tyranids, that's simply the opinion of some priests. i think it more likely that such a creature is another by-product of ancient, and foolish, genetic engineering.