Lamprologus
markerti, new species, is readily distinguished from L. tigripictilisand L. werneri, the LCR endemic lamprologines with
which it was once taxonomically conflated, in the possession of a reduced number of gill rakers on the first arch (9–11
versus 12–17), a longer head (32.1–34.7% SL versus 29.3–31.9 and 29.1–32.9% SL, respectively), and a longer predorsal
length (33.0–35.9% SL versus 29.3–32.7 and 28.5–32.6% SL, respectively). Further, L. markertilacks a second intestinal
loop present in both L. tigripictilisand L. werneri, and has a highly reduced infraorbital series often consisting of a single
first infraorbital (lachrymal) element.