▁( B acter ia ). ▁ ▁Et ym ology ▁The ▁name ▁De fer rib acter ▁der ives ▁from : Lat in ▁pre f . ▁de -, ▁from ; ▁Latin ▁n oun ▁f err um , ▁iron ; ▁New ▁Latin ▁mascul ine ▁gender ▁n oun , ▁a ▁ro db acter , ▁nomin ally ▁meaning ▁" a ▁rod ", ▁but ▁in ▁effect ▁meaning ▁a ▁b acter ium , ▁rod ; ▁New ▁Latin ▁mascul ine ▁gender ▁n oun ▁De fer rib acter , ▁rod ▁that ▁reduces ▁iron . ▁ ▁Species ▁The ▁genus ▁contains ▁ 4 ▁species , ▁namely ▁ ▁D . ▁aby ss i ▁( ▁M iro sh n ichen ko ▁et ▁al . ▁ 2 0 0 3 , ▁; ▁Latin ▁gen itive ▁case ▁n oun ▁aby ss i , ▁of ▁immense ▁depth s , ▁living ▁in ▁the ▁depth s ▁of ▁the ▁ocean .) ▁ ▁D . ▁aut ot roph icus ▁( ▁S lob od k ina ▁et ▁al . ▁ 2 0 0 9 , ▁; ▁New ▁Latin ▁mascul ine ▁gender ▁ad jective ▁aut ot roph icus , ▁aut ot roph ic .) ▁ ▁D . ▁des ulf ur icans ▁( ▁Tak ai ▁et ▁al . ▁ 2 0 0 3 , ▁; ▁New ▁Latin ▁partici ple ▁ad jective ▁des ulf ur icans , ▁reducing ▁sul fur .) ▁ ▁D . ▁therm oph ilus ▁( ▁Gre ene ▁et ▁al . ▁ 1 9 9 7 , ▁ ▁( Type ▁species ▁of ▁the ▁genus ). ; ▁Greek ▁n oun ▁therm ē ▁( θ έ ρ