Megastygonitocrella, Karanovic & Hancock, 2009

Karanovic, Tomislav & Hancock, Peter, 2009, On the diagnostic characters of the genus Stygonitocrella (Copepoda, Harpacticoida), with descriptions of seven new species from Australian subterranean waters 2324, Zootaxa 2324 (1), pp. 1-85 : 49

Key to species of Megastygonitocrella gen. nov.

1 Endopod of second leg with single apical element ...................................................................................................... 2

- Endopod of second leg with two apical elements ......................................................... M. karamani ( Petkovski, 1959)

2 Endopod of second and third legs two-segmented ...................................................................................................... 3

- Endopod of second and third legs one-segmented....................................................................................................... 4

3 Inner seta on second endopodal segment of second leg absent ........................................ M. petkovskii ( Pesce, 1985)

- This seta present....................................................................... M. colchica ( Borutzky & Michailova-Neikova, 1970)

4 Fifth leg with unarmed endopodal lobe ....................................................................................................................... 5

- Fifth leg endopodal lobe armed ................................................................................................................................... 7

5 Fifth leg exopod free..................................................................................................................................................... 6

- Fifth leg exopod fused to somite ............................................................................................. M. pagusregalis sp. nov.

6 Habitus constricted at genital somite ..................................................................................................... M. dec sp. nov.

- Habitus not constricted .................................................................................................................... M. kryptos sp. nov.

7 Third exopodal segment of fourth leg with one or two inner setae .............................................................................. 8

- Third exopodal segment of fourth leg without inner setae ........................................ M. ljovuschkini ( Borutzky, 1967)

8 Third exopodal segment of fourth leg with one inner seta .......................................................................................... 9

- Third exopodal segment of fourth leg with two inner setae ....................................... M. bispinosa ( Karanovic, 2006)

9 Integument without cuticular windows...................................................................................................................... 10

- Cuticular windows present .......................................................................................... M. trispinosa ( Karanovic, 2006)

10 Fifth leg endopodal lobe with two armature elements ................................................................... M. ecowisei sp. nov.

- Fifth leg endopodal lobe with only one element....................................................... M. unispinosa ( Karanovic, 2006)