Dusky Tetraka (Xanthomixis tenebrosus) - HBW 10, p. 249
French: Bulbul obscur
Spanish: Bulbul Oscuro
Other common names: Dusky Greenbul
Taxonomy: Bernieria tenebrosa Stresemann, 1925, Sianaka Forest, central eastern Madagascar.
Relationships of genus with rest of family uncertain. Genus previously merged with Bernieria, but recent mitochondrial DNA sequence data indicate that the five species then involved are not a monophyletic group. Hence, this species and its relatives better placed in present genus. Thought probable, on basis of similarities in plumage pattern, that present species is most closely related to X. zosterops. Monotypic.
Distribution: NE Madagascar, from at least Marojejy S to Zahamena.
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