Key to species of Durckheimia De Man

1 Carapace without longitudinal median carina. Third maxilliped with 2­segmented palp .................................................................................................................. D. besutensis

– Carapace with longitudinal median carina. Third maxilliped with 3­segmented palp.. 2

2 Median carina of carapace blunt, broad, indistinct on anterior third of carapace........... ................................................................................................................... D. carinipes

– Median carina of carapace thin, cristate, distinct for almost full length of carapace, commencing anteriorly from base of median frontal notch .......................................... 3

3 Median carina of carapace entire, uninterrupted ............................................. D. caeca

– Median carina of carapace interrupted by dorsal notch ................................................ 4

4 Frontal margin of carapace rounded; with broad, U­shaped median notch. Third maxilliped dactylus exceeding apex of propodus; proximal ¾ of inner margin of ischiomerus concave ............................................................................................ D. yokotai

– Frontal margin of carapace transverse; with narrow median notch. Third maxilliped dactylus not exceeding apex of propodus; proximal ¾ of inner margin of ischiomerus straight .............................................................................................................. D. lochi