Agreed. Here is a link to the scientific paper describing this species, and while obviously technical, it does have some lovely colour photographs.
http://mapress.com/zootaxa/2009/f/zt02266p050.pdf
As the authors set out, there are now three distinct and valid guppy species.
Poecilia reticulata, the familiar common guppy,
P. wingei, the Endler (which is now "unequivocally defined by the molecular phylogeny as a valid species," and
P. obscura. The very close relationship shown by phylogenetic analysis (DNA) indicates they would interbreed in the aquarium.
These three species are probably more correctly assigned to the sub-genus
Acanthophacelus [erected by Eigenmann (1907)] since they are generically different from all other Poeciliinae. As it has stood, the genus
Poecilia is also that in which the various molly species occur. The genus was erected by Bloch & Schneider (1808) with a molly,
Poecilia vivipara as the type species. The guppy,
P. reticulatus, when described by Peters (1859) was placed in this genus. As the above and the paper make clear, this is not a widely-held valid placement. DNA analysis clearly differentiates the three "guppy" species from all the mollies.
Byron.