Prototheria
Prototheria (nomen a Theodoro Gill anno 1872 inventum) est mammalium subclassis. Sola huius subclassis animalia viva sunt Monotremata.

Bubliographia 
 Corbet, G. B., et J. E. Hill. 1991. A World List of Mammalian Species. Editio tertia. Londinii et Oxoniae: Natural History Museum Publications & Oxford University Press.
 DeBlase, A. F. 1982. "Mammalia." In Synopsis and Classification of Living Organisms, ed. S. P. Parker, 2:1015–1061. Novi Eboraci: McGraw-Hill.
 Groves, C. P. 1993. "Order Monotremata." In Mammal Species of the World, ed. secunda, ed. D. E. Wilson & D. M. Reeder, 13. Vasingtoniae et Londinii: Smithsonian Institution Press.
 Groves, C. P. 2005. "Order Monotremata." In Mammal Species of the World, ed tertia, ed. D. E. Wilson & D. M. Reeder, 1–2. Baltimorae: The Johns Hopkins University Press.
 McKenna, M. C., et S. K. Bell. 1997. Classification of Mammals Above the Species Level. Novi Eboraci: Columbia University Press.
 Nowak, R. M. 1991. Walker's Mammals of the World. Vol. 1. Editio quinta. The Johns Hopkins University Press, Baltimorae et Londinii.

Nexus externi
 Prototheria apud Systema Natura

Mammalia
Taxa Gill
Taxa 1872
Subclasses animalium
Cretaceo nata