Hi Kyle
To the best of my knowledge, the latest in-depth scientific work on angelfish taxonomy was Richard Pyle's PhD Thesis in 2003. He states that " ... three of these genera are further classified among nine subgenera (nominotypical
Centropyge with
Paracentropyge and
Xiphypops ...)" ;
Sumireyakko is considered a synonym of
Paracentropyge. Chapter 3 of this thesis will certainly be of great interest to you.
By the way, Pyle and Randall published the original description of
C. boylei.
In the same year of 2003, Schindler also concludes, and I quote, that "an important diagnostic feature of
Paracentropyge is the relatively deep body (Burgess, 1991). But in the present study the body shape is not confirmed as a significantly distinguishing feature to separate
Paracentropyge from all other taxonomic units".
So, I always refer to
Centropyge multifasciata, C. venusta and
C. boylei. Or, if you prefer to be more accurate,
Centropyge (Paracentropyge) multifasciata, C.(P.) venusta, C. (P.) boylei. And I do this in spite of the fact that, inexplicably, fishbase.org still lists
C. multifasciata as the only member of
Paracentropyge, based on Burgess' work which is considered the main reference for this species ... and Pyle's work is not even listed in the references (
http://www.fishbase.org/summary/Paracentropyge-multifasciata.html and
http://www.fishbase.org/identification/SpeciesList.php?genus=Paracentropyge).
You can find both the above papers online :
http://scholarspace.manoa.hawaii.ed...5/6906/uhm_phd_4412_r.pdf?sequence=2#page=390 and
http://www.alice-dsl.net/mesonauta/Centropyge_shape2003.pdf
Hope this helps, and congratulations on your purchase, wish you the best of luck with those beautiful fishes
João
Ps: before sending this post I did a search on google scholar and couldn't find any recent scientific paper dealing with
Centropyge taxonomy.