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

Idiosoma formosum sp. n., female paratype (WAM T125751) from Mummaloo (Western Australia; AVW). 158–159 Carapace and abdomen, dorsal view 160 Carapace, lateral view 161 Eyes, dorsal view 162 Abdomen, posterior view 163 Sternum, ventral view 164 Leg I, prolateral view 165 Leg I, retrolateral view 166 Spermathecae, dorsal view. Scale bars 2.0 (158–159, 164–165), 0.5 (166). SP2–4 = sigilla pairs 2–4.