Bistolida Stolida and Bistolida Brevidentata

[maxicuro]

I've seen that Meyer, after his DNA analysis, writes that Bistolida Brevidentata is genetically = Stolida Stolida. Really it occurs simpatrically with Stolida Crossei that is very different. Infact the intergrades between Brevidentata and Stolida occur in E Africa (Stolida Clavicola). Moreover Meyer consider two taxon of Stolida (Rubiginosa and Clavicola) as valid subspecies.
Don't you think it is quite strange ?
Opinions are appreciated.