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In Australia, the   Ameiridae   is the most diverse harpacticoid family in groundwater, with 35 species hitherto reported. In this study, we describe two new species belonging to the “vasconica   ”-group of the ameirid genus    Nitocrella    based on specimens collected from groundwaters near mine sites in the Pilbara and Great Sandy Desert regions of northwestern Australia.    Nitocrella   knotti    sp. n.  can be distinguished from related taxa by having two setae on the antennal exopod, four armature elements on the distal endopodal segment of leg 2, four armature elements on the distal endopodal segment of leg 3, three armature elements on the distal endopodal segment of leg 4, and three setae on the basoendopodal lobe of leg 5.    Nitocrella   karanovici    sp. n.  differs from its congeners by having a short outer spine and long inner seta on the distal endopodal segment of leg 2, three armature elements on the distal endopodal segment of leg 3, and four setae on the basoendopodal lobe of leg 5 in the female. This study is of biogeographic interest in providing the first documentation of the genus    Nitocrella    from the Pilbara and Great Sandy Desert regions. Both new species of    Nitocrella    are recorded from restricted localities and appear to be short-range endemics, thus making them potentially vulnerable to environmental changes and threatening processes such as mining. The distribution range of    N.   karanovici    sp. n.  coincides with the centre of diversity of the Ethel Gorge aquifer stygobiont community, a globally significant hotspot which is listed as endangered.

subterranean biology

Two new species of    Nitocrella    (  Crustacea  ,   Copepoda  ,   Harpacticoida  ) from groundwaters of northwestern Australia expand the geographic range of the genus in a global hotspot of subterranean biodiversity