This species can be distinguished from MOR by insertion of first dorsal fin ray slightly anterior to first anal fin ray versus a posterior insertion; it also has a dark red to black postopercular blotch above insertion of pectoral fin (Ref. 84062). Callopanchax sidibeorum can also be distinguished from males of OCC and TOD by up to three irregular and interrupted horizontal stripes on flanks, an absence of vertical dark red or reddish-brown stripes or broad blotches on sides and a mainly blue to blue-green body colour; females can be distinguished by mid-laterally blue to blue-green coloured scales and the absence of the dark brown vertical stripes or blotches, similar as in males (Ref. Sonnenberg, R. and E. Busch, 2010 also here).
"Distinguished from all other Lebias
by the following combination of characters: lower
jaw sharply upturned, nearly perpendicular
to body axis, a condition present among congeners
only in L. splendens; teeth conical rather
than tricuspid as in all Lebias species except L.
asquamatus; cephalic neuromast system open,
not in closed canals as in the L. dispar/L. fasciatus
group; interarcual cartilage absent versus
present in all congeners except L. asquamatus;
pectoral fins obliquely set rather than horizontal
as in all congeners; large size, approaching
91 mm TL versus maximum body size of 70 mm
TL for cogeners (the syntopic population of L.
dispar approaches a maximum of 47 mm TL)."
Getahun, A., & Lazara, K. J. (2001). Lebias stiassnyae: A New Species of Killifish from Lake Afdera, Ethiopia (Teleostei: Cyprinodontidae). Copeia, 2001(1), 150–153. doi:10.1643/0045-8511(2001)001[0150:lsanso]2.0.co;2
