The origin of this saying is therefore unclear. What follows are the lists given by each of the different sources. This list was taken from the Sri Lankan chronicles, "Dipavamsa" (3rd–4th century CE) and "Mahavamsa" (5th century CE). In addition, the Dipavamsa lists the following six schools without identifying the schools from which they arose:  This list was taken from "Samayabhedo Paracana Cakra", the author of which was Vasumitra (d. 124 BCE), a Sarvāstivādin monk. Vinitadeva (c. 645–715) was a Mūlasarvāstivādin monk. The "Śāriputraparipṛcchā" is a Mahāsāṃghikan history. Sthaviravāda () was split into 11 sects. These were: Sarvāstivādin (), Haimavata (), Vatsīputrīya (), Dharmottara (), Bhadrayānīya (), Sammitīya (), Channagirika (), Mahisasaka (), Dharmaguptaka (), Kāśyapīya (), Sautrāntika (). Mahāsāṃghika () was split into 9 sects. There were: Ekavyahārika (), Lokottaravāda (), Gokulika (), Bahuśrutīya (), Prajñaptivāda (), Caitika (), Aparaśaila (), and Uttaraśaila (). Noted Canadian Buddhist scholar A.K. Warder (University of Toronto) identifies the following eighteen early Buddhist schools (in approximate chronological order): Sthaviravada, Mahasamghika, Vatsiputriya, Ekavyavaharika, Gokulika (a.k.a. Kukkutika, etc.), Sarvastivada, Lokottaravāda, Dharmottariya, Bhadrayaniya, Sammitiya, Sannagarika, Bahusrutiya, Prajnaptivada, Mahisasaka, Haimavata (a.k.a. Kasyapiya), Dharmaguptaka, Caitika, and the Apara and Uttara (Purva) Saila. Warder says that these were the early Buddhist schools as of circa 50 BCE, about the same time that the Pali Canon was first committed to writing and the presumptive origin date of the Theravada sect, though the term 'Theravada' was not used before the fourth century CE (see Ajahn Sucitto, "What Is Theravada" (2012); see also A.K. Warder, "Indian Buddhism," 3rd rev. ed. (Delhi: Motilal Banarsidass, 2000), chapters 8 and 9).