Citations:semiptilopædic


 * 1916, United States National Museum, Bulletin L, part vii, page 2:
 * Dorsal vertebræ opisthocœlous; rostrum separately movable, the bill hooked and furnished with a cere (this sometimes feathered, however); feet prehensile; expansor secundariorum muscle absent; rectrices 12–14; secondaries aquintocubital; down on both pterylæ and apteria; young ptilopædic or semiptilopædic…Psittaciformes (p. 103).