This name is a synonym of Micromeria graeca (L.) Benth. ex Rchb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 459890) with original publication details: Fl. Sicul. 2(2): 213 1907.
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 Micromeria calaminthoides in version 1 of The Plant List.