Who did Ibn Abi Aruubah narrate from without having heard from them?

Abu ‘Abd al-Rahman Ahmad ibn Shu’ayb Al Nasaa’i narrated to us, saying:

He mentioned those from whom Ibn Abi ‘Arubah narrated, but did not hear from them:

1. He did not hear from ‘Amr ibn Dinar
2. Nor from Hisham ibn ‘Urwah
3. Nor from Zayd ibn Aslam
4. Nor from ‘Ubaydullah ibn ‘Umar
5. Nor from Abu al-Zinad
6. Nor from al-Hakam
7. Nor from Hammad
8. Nor from Isma’il ibn Abi Khalid

And Allah knows best!