This name is a synonym of Thymus zygis L..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 460420) with original publication details: Bol. Soc. Ib. Ci. Nat. 32: 82 1934.
This name record (from WCSP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Thymus oxyodontus in version 1 of The Plant List.