Key to the Species of Macrhybopsis

5a.  (From 4b.) Belly, anterior to pelvic fins with exposed scales; pharyngeal teeth 1, 4-4, 1.
Macrhybopsis
sp. B, (upper Mobile Basin form)

5b. (From 4b.) Belly, anterior to pelvic fins without scales or scales are embedded; pharyngeal teeth 0, 4-4, 0.
Macrhybopsis
sp. D, (Pearl/Pascagoula form)