Mergus cf. octosetaceus Vieillot, 1817

Nascimento, Rafael S. & Silveira, Luís Fábio, 2024, Fossil and subfossil birds of Brazil, Zoologia (e 23079) 41, pp. 1-234 : 102

274. Mergus cf. octosetaceus Vieillot

Quaternary – MG

Mergus sp. , verisimillime M. octosetaceus Vieill. ( brasilianus Vieill. postea) – Winge 1887: 23.

Mergus spec. ( octosetaceus ?) – Goeldi 1894: 603.

Mergus sp. (“cfr. M. octosetaceus ”) – Lambrecht 1933: 736. Mergus octosetaceus – Brodkorb 1964: 249.

Mergus octosetaceus – Mones 1986: 82.

Mergus octosetaceus – Cuello 1988: 36.

Mergus cf. octosetaceus – Nascimento and Silveira 2020: 490.

Winge (1887) reported two humeri and two tarsometatarsi from Lapa da Escrivânia V, besides the distal end of a tibiotarsus that probably belongs to the same species, possibly Mergus octosetaceus , of which there were no records in Minas Gerais. He noted that the tarsometatarsus is similar to that of Mergus merganser , Mergus serrator , and Mergellus albellus , shorter and stouter than in Merganetta armata , and longer than in Lophodytes cucullatus . The humerus has almost the same size as in M. albellus (but the tarsometatarsus is larger)

and is slightly larger than in Oxyura leucocephala (of which the humerus used in comparison lacked the proximal end).