New species of tube web spiders of the genus Ariadna from South Australia (Araneae, Segestriidae) Author Marsh, Jessica R. Author Baehr, Barbara C. Author Glatz, Richard V. Author Framenau, Volker W. text Evolutionary Systematics 2018 2 2 137 149 http://dx.doi.org/10.3897/evolsyst.2.29172 journal article http://dx.doi.org/10.3897/evolsyst.2.29172 2535-0730-2-137 D49CE72306C24E38B5B0C7C311C8A89E Genus Ariadna Audouin, 1826 Pylarus Hentz, 1842 (synonymised in Beatty 1970 ) Macedonia Hogg, 1900 (synonymised in Rainbow 1911) Segestriella Purcell, 1904 (synonymised in Beatty 1970 ). Remarks. Ariadna is distinguished from other segestriid genera by having a straight to slightly recurved posterior eye row (Figs 2A, 3A), a lateral transverse ridge basally on the chelicerae (Fig. 2A; Giroti and Brescovit 2018 ), a labrum extending past the labium (Figs 2B, 5B; Giroti and Brescovit 2018 ), and chelicerae with three promarginal and one retromarginal teeth ( Beatty 1970 ). It is distinguished from Citharoceps by the lack of stridulatory organ, females lacking a median flap on the interpulmonary fold and by the length of the labium-sternum junction, which is longer than the length of the endite-sternum junction in Citharoceps ( Giroti and Brescovit 2018 ). Note. Holotypes of A. octospinata , mature female (QM W2119) and A. montana , mature female (SAM NN179) were examined.