subfamilies, Grobben, 1905

Key to subfamilies View in CoL

1a. AI with six or seven articles; AII with five to seven articles; labrum smooth; sexual dimorphism present or absent on mandibular palp and/or thoracopods; mandibular palp with one or two claws; MxI with three plumose setae on lateral side; MxII four-segmented; basipod of thoracopod I almost rectangular; exopod inserted distally on basipod; ThI with fourth endopodal article small; uropod with three or four exopodal setae ( Fig. 18B, D, H–J View Figure 18 ); uropod with exopod <endopod; furcal rami with five spines ( Fig. 19 View Figure 19 ) 2

1b. AI with seven articles; AII with eight articles ( Fig. 9B View Figure 9 ); labrum with teeth ( Fig. 9C View Figure 9 ); no sexual dimorphism in mandibular palp or thoracopods; three claws on mandibular palp ( Fig. 9E, F View Figure 9 ); MxI with two smooth setae laterally ( Fig. 9K View Figure 9 ); MxII three-segmented ( Fig. 9L View Figure 9 ); basipod of ThI trapezoidal ( Fig. 10A View Figure 10 ); exopod of ThI inserted medially on basipod; ThI with fourth endopodal article long; male ThVIII with endopod = exopod ( Fig. 11A, B View Figure 11 ); uropod with six exopodal setae ( Fig. 11D View Figure 11 ); uropod with exopod = endopod ( Fig. 11D View Figure 11 ); furcal rami with three spines ( Fig. 11E View Figure 11 )......................................................... .................................................................................................................................................. Queenslandbathynellinae subfam. nov.

2a. AI with six or seven articles; AII with five to seven articles; mandibular palp with one to three articles and one or two claws; sexual dimorphism present or absent in mandibular palp and/or in thoracopods; thoracopods with three or four endopodal articles; female ThVIII with protopod and two branches; male ThVIII with exopod like the exopod of thoracopods ( Fig. 17F–H View Figure 17 ); male ThVIII with endopod <exopod; pleopod II present or absent ............................................................................... 3

2b. AI with seven articles; AII with seven articles ( Fig. 12F View Figure 12 ); mandibular palp with three articles ( Fig. 13M View Figure 13 ) and two claws; sexual dimorphism absent in mandibular palp or thoracopods; thoracopods with four endopodal articles ( Figs 14H View Figure 14 , 15E View Figure 15 ); female ThVIII with protopod and one branch; male ThVIII with exopod not like exopod of thoracopods ( Fig. 17J View Figure 17 ); male ThVIII with exopod = endopod; pleopod II absent; uropod with special seta (‘X’) on endopod ( Fig. 18F View Figure 18 ) .............................. ...................................................................................................................................................................................... Austrobathynellinae

3a. Mandibular palp with one to three articles ( Fig. 13I, J, N View Figure 13 )and one or two claws; mandibular palp with sexual dimorphism thoracopods with three or four endopodal articles ( Figs 14A, B View Figure 14 , 15A, B View Figure 15 ); thoracopods with no sexual dimorphism; female ThVIII with epipod present or absent; pleopod II always absent; sympod of the uropod with maximum four spines ( Fig. 18B, C View Figure 18 )........................................................................................................................................................................... Gallobathynellinae

3b. Mandibular palp always with three articles and two claws ( Fig. 13K, L View Figure 13 ); thoracopods always with four endopodal articles ( Figs 14C, F, I View Figure 14 , 15C, D, F View Figure 15 ); sexual dimorphism present or absent in thoracopods and rarely on the mandibular palp; female ThVIII epipod always present; pleopod II present or absent; sympod of the uropod with more than four spines ( Fig. 18D, E View Figure 18 ) ................................................................................................................................................................................................... Bathynellinae