The following characters in Luciobrama are considered to be specialized (apomorph):
1. Reduced and elongate fourth infraorbital, diverted across the postorbital face (pp. 7 & 26).
2. Elongate postorbital region (including lengthened and narrowed parietals) (pp. 11 & 35).
3. Long tubular nasals, bearing 9-10 pores (pp. 9 & 31).
4. Orbitosphenoid and pterosphenoid bearing posterior and anterior extensions respectively (pp. 9 & 31).
5. Autosphenotic underlying the frontal as a shelf (pp. 13 & 35).
6. Posttemporal fossa extending well forward (pp. 13 & 38).
7. Extensive postparietal platform (pp. 13 & 40).
8. Specialized form of the lower jaw and large number of pores in the mandibular lateral line canal (pp. 13 & 42).
9. Short, inclined hyomandibula (pp. 13 & 44).
10. Elongate pterygoids (p. 15 & 45).
11. Extensive opercular series (pp. 15 & 47).
12. Second neural plate contacting the cranium (pp. 17 & 48).
13. Total number of vertebrae 50 or more (pp. 20 & 51).
14. Enlarged and complex levator arcus palatini muscles (pp. 21 & 53).
15. Scales minute and numerous (p. 7).
Of these characters only 4 is confined to Luciobrama. Characters 2 and 10 are shared only with Aspiolucius. Characters 8 and 9 are shared with Aspiolucius and Pseudaspius. All the remaining characters are shared with Aspiolucius, Pseudaspius and Aspius.