Elephant bird "A. maximus" and "D. stirtoni" were revised to 540 and 730 kg, respectively. Four species are usually accepted in the genus "Aepyornis" today, but the validity of some is disputed, with numerous authors treating them all in just one species, "A. maximus". Up to three species are generally included in "Mullerornis". Several ratites outside of Madagascar have been posited as "aepyornithid"-like and could potentially make this clade considerably more speciose. These include "Eremopezus" from the Eocene of North Africa, unnamed Canary Island remains and several Neogene taxa in Eurasia. "Aepyornis maximus" is commonly known as the 'elephant bird', a term
Borneo elephant Museum of Natural History disagreed in 1943, and placed all Sundaic elephants in the subspecies "Elephas maximus sumatrensis". In 1950, Paules Edward Pieris Deraniyagala described a subspecies "Elephas maximus borneensis", taking as his type an illustration in the National Geographical Magazine. In 2003, the debate was re-opened by a suggestion that the introduced Sulu elephants and the north-east Borneo population might have descended from the now extinct Javan elephant, which was named "Elephas maximus sondaicus" by Deraniyagala. This hypothesis is based on missing archaeological evidence of long term elephant habitation in Borneo, a corroboration in folklore and that elephants have