If I was to send you a query, should I include all my previous publishing credits? I'm working on a historical whodunnit, but I've successfully published several gay erotic romances.
The historical whodunnit would be under my own name; the erotica is under a pseudonym.
What I'm asking, I suppose, is are all genres created equal?
Sort of. Writing credits aren't about what you wrote so much as they are an indication you write well enough that your work was selected for publication. Writing credits also mean you've been over the waterfall one or more times and had most of your delusions rinsed away in the deep cold publication pool.
The way to cover writing credits in a separate genre from the novel you're querying, and a separate name is this:
Under a different name I wrote several gay erotic romances for Lipz Und Tipz, the leading purveyor of gay erotica romance for the discerning reader. (You'll want to describe the publisher in that many agents will not be as aware of publishers in this genre as they are, say, of thrillers)