This genus is closely allied to _Aphanapteryx_ and _Erythromachus_, but, on
the whole, is nearer to _Aphanapteryx_. It differs from both these genera
and _Ocydromus_ in the large protuberances on the basi-temporal region of
the skull, and the tarso-metatarsus was much shorter than in
_Aphanapteryx_. For complete diagnosis of this genus see Andrews in
Novitates Zoologicae, Vol. III, pp. 73-76 (1896).