Idiosoma arenaceum sp. n., male holotype (WAM T139527) from Zuytdorp (Western Australia; GES), somatic morphology. 57–58 Carapace and abdomen, dorsal view 59 Carapace, lateral view 60 Eyes, dorsal view 61 Mouthparts, ventral view 62 Sternum, ventral view 63 Abdomen, posterior view 64 Leg I, prolateral view 65 Leg I tibia, clasping spurs, prolateral view 66 Leg I tibia, proventral view. Scale bars 2.0. SP2–4 = sigilla pairs 2–4.