Both the Ekavyāvahārika school, as well as the Lokottaravādin, as well as the Gokulika and those that derive from it, the Bahushrutīya, the Prajñaptivādin and the Chaitika, all of which derive from the Mahāsānghika school, are currently extinct.
External Links: Branches of Buddhism / Schools of Buddhism / Early Buddhist schools / The eighteen schools / Mahāsāṃghika / Ekavyāvahārika / Kukkuṭika / Prajñaptivāda