Not related to another Bookworm I know. But still... a fine example of a Researcher Wolfskunk. Yes, the two heads, three-wide chest, extra leg (a true middle) and extra tail are part of being a Researcher.

Researcher Drygers only have the extra head, as the three wide chest is common among Drygers (they ether are three wide or two pair) and a third leg/second tail hasn't expressed itself yet.