Gibb: RE celeusma, fwiw, neither is it a legal play in Scrabble.

Like Steve in another thread, I would think you've got your (sub)genre taxonomy backwards. You're diagramming bebop and sorry jazz didn't make your cut.

Otoh, the standard dictionary definitions of celeusma (not yours or mine) wouldn't require an alternate/parallel universe of Western music if Stan Hugill, or any other multilingual chantyman, merely switched to Spanish &c as a gritadore, salomadore &c, &c.