Although Vectidromeus is similar to Hypsilophodon, it can be distinguished by a convex dorsal margin on the neural spines of the dorsal vertebrae, an ilium with a short,
ventrally directed pubic peduncle and a strongly arched dorsal margin, short and deep posterior ala of ilium,and a laterally exposed brevis fossa.
The ischium has a broad, rectangular distal blade, with the obturator process small and weakly demarcated from ischium. The femur has a large, broad fourth trochanter, similar to that of Hypsilophodon.