Sittasomus griseicapillus axillaris Zimmer 1934

Zimmer 1934. Studies of Peruvian Birds. XVI. Notes on the genera Glyphorhynchus, Sittasomus, Deconychura Margarornis, Premnornis Premnoplex and Slerurus. American Museum Novitates, no. 757 1934: pp. 1-22