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

Burrows of shield-backed trapdoor spiders of the Idiosoma nigrum-group. 13 I. nigrum from Minnivale Nature Reserve (Western Australia) 14–15 I. clypeatum sp. n. from Weld Range (Western Australia) 16–17 I. sigillatum (O. P.-Cambridge, 1870) from Shenton Park, Perth (Western Australia) 18 I. schoknechtorum sp. n. from Meenaar Nature Reserve (Western Australia) 19–20 I. arenaceum sp. n. from Kalbarri National Park (Western Australia) 21 I. kopejtkaorum sp. n. from Charles Darwin Nature Reserve (Western Australia) 22–23 I. jarrah sp. n. from N. of Arthur River (Western Australia) 24 I. mcclementsorum sp. n. from Julimar State Forest (Western Australia). Note the ‘moustache-like’ arrangement of twig-lines characteristic of the nigrum-group. Images 13, 19–23, 24 by M. Harvey; 14–15 by Astrid Heidrich, used with permission; 16–18 by M. Rix.