Zamadamu walikuwa wanyama wenye umbile lililokaribiana na mwili wa binadamu kuliko hata sokwe. Binadamu wanadhaniwa kuwa walitokana na hao wa kwanza miaka laki kadhaa iliyopita, labda kwa kupitia spishi nyingine za jenasi "homo". Kwa sasa hakuna tena zamadamu hai duniani, ila mabaki ya mizoga yao yanazidi kupatikana hasa barani Afrika. (2008) Palaeobiology II. John Wiley & Sons, 600. ISBN 9780470999288.  Franzen, J. L. (1985). "Asian australopithecines?". In: Hominid Evolution: Past, Present, and Future. New York: Wiley-Liss, 255-263. Gao, J. (1975). "Australopithecine teeth associated with Gigantopithecus". Vertebrata Palasiatica. 13(2): 81-88. Kottak, C. P. (2004). "Glossary", Cultural Anthropology: The Exploration of Human Diversity, 10th, McGraw-Hill. ISBN 978-0072832259.  Liu, Wu, Ronald Clarke, and Song Xing. (2010). "Geometric morphometric analysis of the early Pleistocene hominin teeth from Jianshi, Hubei Province, China." Science China Earth Sciences. 53(8): 1141-1152. (2005) The Cambridge Dictionary of Human Biology and Evolution.