<i>Aulacorhamphus cyanolaemus</i> = <i>Aulacorhynchus atrogularis cyanolaemus</i> (subspecies of Black-throated Toucanet)
<bdi><a href="https://en.wikipedia.org/wiki/en:John_Gerrard_Keulemans" class="extiw" title="w:en:John Gerrard Keulemans"><span title="Dutch bird artist (1842-1912)">John Gerrard Keulemans</span></a>
</bdi>
1891
Catalogue of the Birds in the British Museum. Volume 19