▁contain ▁many ▁species , ▁Tr ich omy ct er us ▁is ▁poor ly ▁known ▁with ▁many ▁of ▁the ▁known ▁species ▁based ▁on ▁brief ▁descri ptions . ▁Many ▁species ▁have ▁been ▁described ▁recently ▁and ▁many ▁more ▁are ▁waiting ▁to ▁be ▁described . ▁ ▁Some ▁authors ▁have ▁tent atively ▁defined ▁put ative ▁mon oph y let ic ▁ass embl ages ▁within ▁the ▁genus ▁Tr ich omy ct er us ▁based ▁on ▁the ▁possession ▁of ▁unique ▁morph ological ▁features . ▁The ▁Tr ich omy ct er us ▁bras ili ensis ▁species - complex ▁includes ▁T . ▁bras ili ensis , ▁T . ▁i her ing i , ▁T . ▁mar ac aya , ▁T . ▁m imon ha , ▁T . ▁pi ra bit ira , ▁T . ▁pot sch i , ▁T . ▁verm icul atus ▁and ▁several ▁und es cribed ▁species ▁apparently ▁en demic ▁to ▁the ▁main ▁river ▁bas ins ▁dra ining ▁the ▁Brazil ian ▁Sh ield . ▁However , ▁an ▁assemb lage ▁of ▁species ▁from ▁south ▁and ▁sout he astern ▁Brazil ▁is ▁also ▁supported ▁that ▁includes ▁T . ▁cast ro i , ▁T . ▁dav isi , ▁T . ▁gu ara qu ess aba , ▁T . ▁imm ac ul atus , ▁T . ▁it ati ay ae , ▁T . ▁m boy cy , ▁T . ▁mir iss um ba , ▁T . ▁na ip i , ▁T . ▁n ig ric ans , ▁T . ▁pap ill ifer us , ▁T . ▁pl um be us , ▁T . ▁st aw