Marusyllus mongolicus (Prószyński, 1968)
Description
Male
Prosoma dark brown, eye field covered with yellowish scales and a few white ones concentrated into 3 white longitudinal stripes, row of white, yellow and grey bristles above eyes. Opisthosoma dorsally greyish-brownish-black, covered with white scales with a silver or sometimes yellow gleam. Legs long.
Prosoma length: 1.58 mm, prosoma width: 1.28 mm.
Female
Prosoma black or brown-olive-grey, covered with white, yellowish and black scales. Opisthosoma dorsally light fawn, covered with white and black scales arranged in transverse stripes. Legs white yellow. Epigyne: copulatory openings oval and small, the ridge between them flat, vaginal roof is small within distinctly procurved posterior edge.
Prosoma length: 1.48 mm, prosoma width: 1.28 mm.
Distribution
Figures
Pedipalp, prolateral view
(Logunov & Marusik 2003)
Pedipalp, retrolateral view
(Logunov & Marusik 2003)
Pedipalp with tibia, patella and femur, prolateral view
(Logunov & Marusik 2003)
Pedipalp with tibia, patella and femur, retrolateral view
(Logunov & Marusik 2003)
Bulbus, prolateral view
(Logunov & Marusik 2003)
Palpal tibia, retrolateral view
(Logunov & Marusik 2003)
Leg I
(Logunov & Marusik 2003)
Epigyne
(Logunov & Marusik 2003)
Vulva, dorsal view
(Logunov & Marusik 2003)
Distribution List
References
Logunov D V, Marusik YM (2003) A revision of the genus Yllenus Simon, 1868 (Arachnida, Araneae, Salticidae). KMK Scientific Press Moscow, 168 pp 
Nuruyeva T, Zamani A (2025) An annotated checklist of the spiders (Arachnida: Araneae) of Azerbaijan. Zootaxa 5680: 1-168
Otto S (2022) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 02.2022. Internet: caucasus-spiders.info.
Ponomarev A V (2022) Spiders (Arachnida: Araneae) of the southeast of the Russian Plain: catalogue, the fauna specific features. SSC RAS Publishers, Rostov-on-Don, 640 pp.
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.5.2026) doi: 10.24436/2