Proto-Yukaghir is the reconstructed ancestor of the Yukaghir languages (Northern and Southern Yukaghir and the extinct Omok and Chuvan).
Currently, the transcription of phonemes in Proto-Yukaghir is taken over directly from Nikolaeva (2006):
| labial | dental | palatal | velar | uvular | |
|---|---|---|---|---|---|
| Stop/Sibilant | p | t | s | k | q |
| Fricative | ẟ | ɣ | |||
| Affricate | č | čʼ | |||
| Nasal | m | n | ń | ŋ | |
| Lateral | l | ľ | |||
| Trill/Approximant | w | r | j |
| Consonant correspondences in Yukaghiric languages | |||||||
|---|---|---|---|---|---|---|---|
| Proto-Yukaghir | Northern Yukaghir | Southern Yukaghir | notes | ||||
| *p | п | п | |||||
| *t | т | т | |||||
| *k | к | к | |||||
| *q | х | х | |||||
| *s | с | сь | |||||
| *ẟ | р | д | SY *ẟ# > т | ||||
| *ɣ | г/ҕ | г/ҕ | *ɣT > кT/хT *ɣD > уD *ɣN > N | ||||
| *č | ч | ч | |||||
| *čʼ | ч | ч | |||||
| *m | м | м | |||||
| *n | н | н | |||||
| *ń | нь | нь | SY *ń- > й | ||||
| *ŋ | ҥ | ҥ | |||||
| *l | л | л | |||||
| *ľ | ль | ль | |||||
| *w | в | б | SY *w- > ∅ | ||||
| *r | р | р | |||||
| *j | й | й | |||||
| Front | Back | |||
|---|---|---|---|---|
| unrounded | rounded | unrounded | rounded | |
| High | i | ü | y | u |
| Low | e | ö | a | o |
| Vowel correspondences in Yukaghiric languages | |||||||
|---|---|---|---|---|---|---|---|
| Proto-Yukaghir | Northern Yukaghir | Southern Yukaghir | notes | ||||
| *a | а | а | |||||
| *o | о | о | NY *Wo/*oW > Wа/аW | ||||
| *ö | ө | ө | SY *öCu > уCу | ||||
| *e | е | е | *We/*eW > Wө/өW SY *eCi > иCи | ||||
| *u | у | у | *Ju/*uJ > Jи/иJ | ||||
| *i | и | и | *Wi/*iW > Wу/уW | ||||
| *y | и | и | |||||
All Proto-Yukaghir reconstructions should feature at least two descendants or a derived term and a descendant. The current standard for listing descendants is as such:
* {{desc|ykg|}}
* {{desc|yux|}}
* {{desc|xcv|}}
* {{desc|omk|}}
The main sources for Proto-Yukaghir reconstructions are works by Irina Nikolaeva, including {{R:qfa-yuk:Nikolaeva:2006}}.