The answeres to the following question: Is the Ocean Samadhi a metaphor or an actual meditation? implply there are 8 types of conciousness in Chinese Buddhism. What are these? How did they originate? Is this there a common text with Theravada which is cited deriving or rationalising this?
From the wiki page:
All surviving schools of buddhist thought accept – "in common" – the existence of the first six primary consciousnesses (Sanskrit: vijñāna, Tibetan: རྣམ་ཤེས་, Wylie: rnam-shes).1 The internally coherent Yogācāra school associated with Maitreya, Asaṅga, and Vasubandhu, however, uniquely – or "uncommonly" – also posits the existence of two additional primary consciousnesses, kliṣṭamanas and ālayavijñāna, in order to explain the workings of karma. The first six of these primary consciousnesses comprise the five sensory faculties together with mental consciousness, which is counted as the sixth.