Allied to _Chenalopex_ and _Chenopis_, but differs from _Chenalopex_ in the
form and proportion of its metatarsus, and from all other Anserine forms by
the extreme length and slenderness of the shaft of the tibio-tarsus and the
relative shortness of the fibular crest. From _Chenopis_ it differs in
several respects, and the very long fibular crest of the latter at once
separates them.