大乘百法明門論開宗義記 1.8

1.8

"The different sects are twenty: two root and eighteen branch.
Root Sthavira and Mahāsāṃghika; branches initially from Mahāsāṃghika:
Ekavyāvahārika, Lokottaravāda,
Kaukkulikā, and Bahuśrutīya,
Prajñaptivāda, Caityaśaila,
Aparaśaila, and Uttaraśaila.
Sthavira named Haimavata,
From which flowed out Sarvāstivāda,
Vātsīputrīya, Dharmottarīya,
Bhadrayānīya, Saṃmatīya, Ṣaṇṇagarika,
Mahīśāsaka and Dharmaguptaka,
Kāśyapīya, and Sautrāntika."