I came across this web image of
dust cirrus in Octans.
Thanks to astro-imager José Joaquín Pérez who observes from Valle del Equi, Chile, for this. No coordinates or image scale given, but this patch of dust extinction clearly extends more widely than this image. I've been shrugging my shoulders over Octans for awhile; now I know why.
I looked around arXiv, SAO, and Google Scholar for web links to large-scale dust extinction maps of the Southern skies. Lots of small regions or object associations, but no large maps. Anyone have any pointers?
=Dana in SA