Turned P

Turned P is an additional letter of the Latin script which was used in the orthographies of certain Siouan languages, mostly by James [Owen Dorsey] in the 19th century. Its lowercase form is used in the Anthropos [phonetic alphabet|Anthropos alphabet], the phonetic alphabet of the journal Anthropos.
This letter has the form of a P and p turned 180 degrees.

Usage

James Owen Dorsey used turned P in his published works to represent , a tense consonant present in three Dhegihan languages, the Omaha-Ponca language, the Quapaw language, and the Kansa language. It is also used for the Osage language, but this is erroneous as the sound does not exist, but a preaspirated consonant corresponds.
In the Anthropos transcription, is used to represent bilabial clicks.