|Named By:||Gaudry in 1886|
|Time Period:||Late Carboniferous - Early Permian, 299-296.4 Ma|
|Location:||England - Kenilworth Sandstone Formation. France. Germany - Dohlen Formation, Niederhaslich-Schweinsdorf Formation. Poland - Ludwikowice Formation. USA, Kansas - Stanton Formation|
|Size:||Between 70 and 150 centimetres long depending upon the species. Smaller species such as H. garnettensis about 70 centimetres, while larger species like H. baylei about 140 centimetres long|
|Classification:||| Chordata | Synapsida | Pelycosauria | Sphenacodontia ||
|Also known as:||| Callibrachion Datheosaurus | Palaeohatteria | Pantelosaurus ||
Haptodus is an extinct genus of basal sphenacodont, a clade that includes therapsids and hence, mammals. It was at least 1.5 metres (5 ft) in length. It lived from Latest Carboniferous to Early Permian. It was a medium-sized predator, feeding on insects and small vertebrates. H. garnettensis is currently the basalmost sphenacodontian.