Willisornis poecilinotus, GUTTURALIS

Quaresma, Tânia Fontes, Cronemberger, Áurea A., Batista, Romina & Aleixo, Alexandre, 2022, Diversification and species limits in scale-backed antbirds (Willisornis: Thamnophilidae), an Amazonian endemic lineage, Zoological Journal of the Linnean Society 196 (4), pp. 1408-1430 : 1420

WILLISORNIS POECILINOTUS GUTTURALIS

( TODD, 1927)

Taxonomy

Genetic lineages with plumage characteristics described below can be unequivocally assigned to W. p. gutturalis (type locality: São Paulo de Olivença, on the south bank of the upper Amazon; Peters, 1951), distributed in south-western Amazonian Brazil and north-eastern Peru ( Gill et al., 2022).

Plumage attributes

Males are similar to those of W. p. duidae lineages, but readily distinguished by a conspicuous a narrow black throat patch. Females are pale rufous above and below, paler underneath. ‘Lace’ similar as in males, in black−white colour. Tail pale rufous, with white spots in the middle part and on the terminal edges.

Genetic differentiation

Specimens with the plumage characteristics above belong to a highly distinct genetic lineages that is completely sorted for their mitochondrial DNA, but less so for the nuclear genes and which is distributed in a restricted area between the Juruá and Amazon/ Solimões rivers (Fig. 1).

Plumage variation

We have not identified conspicuous variations in plumage.