Yllenus is a genus of jumping spiders that was first described by Eugène Louis Simon in 1868. Until 2019, it was considered a senior synonym of Pseudomogrus, and many of the species formerly placed here were transferred to new genera Logunyllus and Marusyllus by Jerzy Prószyński in 2016.
Y. arenarius is peculiar in building silken nests under the sand surface of sandy dunes it inhabits.
Species it contains eighteen species, found from central Europe to China: Yllenus arenarius Simon, 1868 (type) – Central, Eastern Europe Yllenus baltistanus Caporiacco, 1935 – India Yllenus charynensis Logunov & Marusik, 2003 – Kazakhstan Yllenus desertus Wesolowska, 1991 – Mongolia Yllenus dunini Logunov & Marusik, 2003 – Azerbaijan, Kazakhstan Yllenus erzinensis Logunov & Marusik, 2003 – Russia, Mongolia Yllenus flavociliatus Simon, 1895 – Russia, Central Asia, Mongolia, China Yllenus gajdosi Logunov & Marusik, 2000 – Mongolia Yllenus horvathi Chyzer, 1891 – Hungary, Bulgaria, Romania, Ukraine Yllenus karakumensis Logunov & Marusik, 2003 – Turkmenistan Yllenus kononenkoi Logunov & Marusik, 2003 – Kyrgyzstan Yllenus kulczynskii Punda, 1975 – Mongolia Yllenus lyachovi Logunov & Marusik, 2000 – Russia (Europe), Kazakhstan Yllenus marusiki Logunov, 1993 – Mongolia Yllenus rotundiorificus Logunov & Marusik, 2000 – Mongolia Yllenus turkestanicus Logunov & Marusik, 2003 – Central Asia Yllenus uiguricus Logunov & Marusik, 2003 – Kazakhstan Yllenus zyuzini Logunov & Marusik, 2003 – Russia (Caucasus), Kazakhstan, Turkmenistan
References
External links Photograph of Y. univittatus