The FMT inhabits the Black Warrior River systemabove the Fall Line
in north-central Alabama, USA (Fig. 1). Previous studies have shown
that this species prefers creeks and rivers of intermediate size (≤3rd
order) and intermittent depths (1–5 ft) with primarily rocky substrate
and either abundant flagstone or sandstone shelves that extend underwater
for retreat sites (Estridge, 1970; Mount, 1981; Ernst et al., 1983).