Key to adult Joshuella in North America

1 With three pairs of adanal setae; seta d on genu I inserted mid-segment; solenidion on genu III inserted about midsegment and distant from seta d ................................................................................................................................... 2

- With two pairs of adanal setae, ad2 absent; seta d on genu I on proximal half of segment; solenidion on genu III with alveolus near seta d in proximal half of segment ............................................. Joshuella agrosticula Paschoal, 1983 c

2 Sensillus (65–85 µm long) not reclinate; posterior notogastral setae on weak apophyses ............................................ ................................................................................................................................... Joshuella striata Wallwork, 1972

- Sensillus (90–115 µm long) reclinate; posterior notogastral setae on strong apophyses .............................................. ........................................................................................................................ Joshuella bicentenaria Paschoal, 1983 c