Ant mimic spider

Ant mimic spider

Observation - Ant mimic spider - Southern Africa. Description: elongated grey + brown spider with narrow petiole, and legs a distinct longitudinal dark stripe on t

elongated grey + brown spider with narrow petiole, and legs a distinct longitudinal dark stripe on the upper surface of each femur as in the picture of Corinnomma lawrencei (ADS(2014) p.285) although the text says simply 'legs dark'; actively nipping around the lower walls of the bathroom.
UPDATE: new species of Castianeira yet to be named - see comment below