Idiosoma arenaceum sp. n., female (AMS KS6393) from Geraldton (Western Australia; GES). 70–71 Carapace and abdomen, dorsal view 72 Carapace, lateral view 73 Eyes, dorsal view 74 Abdomen, posterior view 75 Sternum, ventral view 76 Leg I, prolateral view 77 Leg I, retrolateral view 78 Spermathecae, dorsal view. Scale bars 2.0 (70–71, 76–77), 0.5 (78). SP3–4 = sigilla pairs 3–4.

 
 
  Part of: Rix MG, Huey JA, Cooper SJB, Austin AD, Harvey MS (2018) Conservation systematics of the shield-backed trapdoor spiders of the nigrum-group (Mygalomorphae, Idiopidae, Idiosoma): integrative taxonomy reveals a diverse and threatened fauna from south-western Australia. ZooKeys 756: 1-121. https://doi.org/10.3897/zookeys.756.24397