+शाखाः

शकल-शाखा

• “Nambudiris of Kerala recite even the Brahmana and Aranyaka with accents. Accented manuscripts of Brahmana and Aranyaka are available to this day.”

शाङ्खायनशाखा

• वैदिकभारतसंस्थया पुनर् उज्जीव्यमाना।

बाष्कल-शाखा

• “Claims have been made about its existence in Kerala, Rajasthan, Bengal and Assam as a living tradition, but have never been verified. The Samhita exists in manuscript. "
• “Nambudiris of Kerala are said to follow this Shakha of RV as far as the Samhita is concerned but studies of their oral tradition do not seem to bear this out. "

आश्वलायनशाखा

• “Manuscripts of the Samhita have been found in Kashmir, Maharashtra (Ahmadnagar) and Patna (Bihar).”

भ्रान्तिः

In parts of central and eastern India, Shakala RV texts are often attributed to Ashvalayana. For instance, the Aitareya Brahman is often called Ashvalayana Brahmana in West Bengal. Oral traditions extinct although the followers of Shakala Shakha in Maharashtra often term themselves as Ashvalayanas because they follow the Kalpasutra (Shrautasutra + Grhyasutra) of Ashvalayana.

Source: The Vedas: Literature of Ancient India

शाखान्तरम्

Paingi Rigveda: Exited in Tamil Nadu, in and around Andavan. Oral traditions lost but Brahmana texts rumored to exist.

Mandukeya Rigveda: Magadha and eastern and central Uttar Pradesh. Possibly lower Himalayas in Uttarakhand and Himachal Pradesh. No text or oral tradition extant although the Brhaddevata and Rigvidhana might belong to it.

Source: The Vedas: Literature of Ancient India