Sinapsidi () su kladus amniota kojem pripadaju sisari, kao i njihovi izumrli srodnici i prapreci koji su bili su dominantni kopneni kičmenjaci u srednjem i kasnom permu.-{Laurin & Reisz 2007.}--{Alfred Romer & Parsons, T.S. (1985): The Vertebrate Body. (6th ed.) Saunders, Philadelphia}--{Carroll}- 1988: 397.-{Benton 2005}-: 122.
Reference
Literatura
Robert L. Carroll (1988) "Vertebrate Paleontology and Evolution." W. H. Freeman and Company, New York,
Laurin, Michel, and Robert R. Reisz (2007). Synapsida: Mammals and their extinct relatives . Version 6 April 2007. The Tree of Life Web Project.
Spoljašnje veze Aron Ra - "Systematic Classification of Life (episode 15) - Synapsida" -{Synapsida - Pelycosauria - at Palaeos}- -{Transitional Vertebrate Fossils}-
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