Euxenura

(syn. Ciconia Ϯ Maguari Stork C. maguari) Gr. ευ eu  truly; ξενος xenos  strange; ουρα oura  tail; "EUXENURA, Ridgway.  ... (Type, Ardea maguari, Gmel.)  ... differing from that genus [Ciconia] in the form of the tail, which is short and deeply forked, with very rigid feathers; the longer lower coverts similar to ordinary rectrices in form and development, having their upper surface convex, the shafts stiff, and the webs firm, thus presenting the appearance of a second tail!" (Ridgway 1878).

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 19 December 2018).