Note the distal aspect of the palpal bulb showing second prong and serration patterns.
The distinctiveness of the M.tigris palpal bulb separates this species from M. foliata and M. torreya according to Bond et al.
http://www.pensoft.net/journals/zookeys/article/3011/phylogenetic-reconsideration-of-myrmekiaphila-systematics-with-a-description-of-the-new-trapdoor-spider-species-myrmekia
Specimen courtesy of Dr. Charles Ray, Auburn, University
Auburn, Alabama