Geranoaetus Kaup, 1844

Nascimento, Rafael S. & Silveira, Luís Fábio, 2024, Fossil and subfossil birds of Brazil, Zoologia (e 23079) 41, pp. 1-234 : 156

Geranoaetus Kaup

510. Geranoaetus albicaudatus (Vieillot)

Holocene – RJ

Buteo albicaudatus – Kneip et al. 1994: 50.

Kneip et al. (1994) reported this species among the material from sambaquis of Beirada, Moa, and Pontinha in Saquarema , Rio de Janeiro, without specifying the exact site or the number of remains .

511. Geranoaetus melanoleucus (Vieillot)

Quaternary – MG

Buteo sp. , melanoleucus v. aff ., s. under B. melanoleucus [in part] – Winge 1887: 14.

Buteo melanoleucus – Winge 1887: 36.

Buteonines [in part] – Goeldi 1894: 76.

Buteo melanoleucus – Lambrecht 1933: 748.

Buteo fuscescens – Brodkorb 1964: 281.

Buteo fuscescens [ Buteo melanoleucus ] – Mones 1986: 83–84. Geranoaetus melanoleucus – Cuello 1988: 38.

Geranoaetus melanoleucus – Penido et al. 2012: 8.

Geranoaetus melanoleucus – Penido et al. 2013: 117. Geranoaetus melanoleucus – Nascimento and Silveira 2020: 491.

Winge (1887) reported several bones of an individual (and some of a second) from Lapa da Escrivânia V. The material consists of the neurocranium, mandibular branch, thoracic vertebra, part of the synsacrum and pelvis, scapula, humerus, ulna, radius, carpal [27], carpometacarpus, femur, tibiotarsus, first phalanx of the hallux, second phalanx of digit II, and ungual phalanx. They correspond precisely to the skeleton of a Chilean specimen of Geranoaetus melanoleucus and are larger and divergent than Geranoaetus albicaudatus . There are femora and tibiotarsi of two individuals, one of them slightly larger than in a recent skeleton. There is also a third phalanx of digit III from the same site, somewhat small for this species. The proximal end of a humerus from Lapa da Escrivânia XI fits well into this species. A radius and several pedal phalanges (including the second of the right and left digits II) from Lapa da Escrivânia III possibly belong to this or a close species. They are slightly smaller than in G. melanoleucus and somewhat larger than and less similar to G. albicaudatus . Winge also noted that Spizaetus ornatus and Spizaetus tyrannus , of comparable size, differ in several ways.