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TyranniscusSmit. Tyranniscus leucogonys Phyllomyias burmeisteri leucogonys Sclater Salvin Sclater Sclater Salvin Whitefronted Tyrannulet top Ashyheaded Tyrannulet center Venezuelan Tyrannulet bottom Proceedings of the Zoological Society of London archive org vol archive org page plate LIII published creator Joseph Smit