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A monophyletic Favorlang-Taokas subgroup is supported by these innovations:
1. an innovative numeral for ‘6’: Favorlang and Babuza nataap, Taokas tahap, tákap , takkap (sets #26 and 28 in the ABVD). These are additive forms based on a 1+5 prototype (*sa-RaCep), different from Saisiyat and Pazeh where ‘6’ is 5+1.
The Favorlang-Babuza form nataap is composed of natta ‘1’ and achab [ahab] < *RaCep ‘five’ reduced to [ab]. natta in turn reflects PAN *sa ‘one’ with na- prefixed marker of a derived series of numerals of uncertain functions: na-rroa ‘two’, na-torro-a ‘three’, na-spat ‘four’, na-chab ‘five’, na-taap ‘six’.
Taokas tahap, tákap , takkap ‘six’ is composed of ta- < *sa ‘one’ plus hap, kap, kkap in different dialect points. Initial h, k, kk reflects PAN *R. PAN *C should give Taokas s: here it is lost, presumably after *RaCep was reduced to Rasp through syncope.
2. An innovative word for ‘dog’. Favorlang mado, Babuza mato/malu/mado/malok (dialects), Taokas mato/maro/mazok/marox/malok etc. (dialects), all ‘dog’ (set #9 in ABVD). These forms go back to *ma[d]uq and displace PAN *asu, u-asu ‘dog’.
A Favorlang-Taokas subgroup is common to my phylogeny and to Blust’s.
ABVD (Austronesian Basic Vocabulary Database). Online at https://abvd.shh.mpg.de/austronesian/. Accessed June 19, 2020.