On the tree of life, this acorn worm is closer to us than they are to lobsters, but spine-to-guts, their embryos show the lobster pattern, and not ours.

在生命之树上，这种橡子虫比龙虾更接近我们，但脊椎到内脏，它们的胚胎显示出龙虾的形状，而不是我们的。