Transferred to other genera:
Yllenus albifrons (Lucas, 1846) -- see Pseudomogrus
Yllenus albocinctus (Kroneberg, 1875) -- see Pseudomogrus
Yllenus algarvensis Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus arabicus Prószyński, 1993 -- see Pseudomogrus
Yllenus aralicus Logunov & Marusik, 2003 -- see Marusyllus
Yllenus auriceps (Denis, 1966) -- see Pseudomogrus
Yllenus auspex (O. Pickard-Cambridge, 1885) -- see Marusyllus
Yllenus bactrianus Andreeva, 1976 -- see Pseudomogrus
Yllenus bajan Prószyński, 1968 -- see Marusyllus
Yllenus bakanas Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus bator Prószyński, 1968 -- see Marusyllus
Yllenus bucharaensis Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus caspicus Ponomarev, 1978 -- see Pseudomogrus
Yllenus coreanus Prószyński, 1968 -- see Marusyllus
Yllenus dalaensis Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus gavdos Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus gregoryi Logunov, 2010 -- see Marusyllus
Yllenus guseinovi Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus halugim Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus hamifer Simon, 1895 -- see Marusyllus
Yllenus improcerus Wesołowska & van Harten, 1994 -- see Pseudomogrus
Yllenus israelensis Logunov, 1996 -- see Pseudomogrus
Yllenus kalkamanicus Logunov & Marusik, 2000 -- see Marusyllus
Yllenus karnai Logunov & Marusik, 2003 -- see Marusyllus
Yllenus knappi Wesołowska & van Harten, 1994 -- see Pseudomogrus
Yllenus kotchevnik Logunov & Marusik, 2003 -- see Marusyllus
Yllenus kronebergi Roewer, 1951 -- see Marusyllus
Yllenus logunovi Wesołowska & van Harten, 2010 -- see Pseudomogrus
Yllenus maoniuensis (Liu, Wang & Peng, 1991) -- see Marusyllus
Yllenus mirabilis Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus mirandus Wesołowska, 1996 -- see Pseudomogrus
Yllenus mongolicus Prószyński, 1968 -- see Marusyllus
Yllenus murgabicus Logunov & Marusik, 2003 -- see Marusyllus
Yllenus namulinensis Hu, 2001 -- see Marusyllus
Yllenus nigritarsis Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus nurataus Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus pamiricus Logunov & Marusik, 2003 -- see Marusyllus
Yllenus pavlenkoae Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus pennatus (Denis, 1957) -- see Phlegra
Yllenus pseudobajan Logunov & Marusik, 2003 -- see Marusyllus
Yllenus pseudovalidus Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus ranunculus Thorell, 1875 -- see Pseudomogrus
Yllenus robustior Prószyński, 1968 -- see Marusyllus
Yllenus saliens O. Pickard-Cambridge, 1876 -- see Pseudomogrus
Yllenus salsicola (Simon, 1937) -- see Pseudomogrus
Yllenus shakhsenem Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus skalanicus (Dobroruka, 2002) -- see Euophrys
Yllenus somonensis Prószyński, 1982 -- see Pseudomogrus
Yllenus squamifer (Simon, 1881) -- see Pseudomogrus
Yllenus starmuehlneri Roewer, 1955 -- see Plexippoides
Yllenus tamdybulak Logunov & Marusik, 2003 -- see Pseudomogrus
Yllenus tschoni (Caporiacco, 1936) -- see Pseudomogrus
Yllenus tuvinicus Logunov & Marusik, 2000 -- see Marusyllus
Yllenus univittatus (Simon, 1871) -- see Pseudomogrus
Yllenus uzbekistanicus Logunov & Marusik, 2003 -- see Marusyllus
Yllenus validus (Simon, 1889) -- see Pseudomogrus
Yllenus vittatus Thorell, 1875 -- see Pseudomogrus
Yllenus zaraensis Logunov, 2009 -- see Pseudomogrus
Yllenus zhilgaensis Logunov & Marusik, 2003 -- see Pseudomogrus
In synonymy:
Yllenus baltistanus shaksgamica Caporiacco, 1935 = Yllenus baltistanus Caporiacco, 1935 (Prószyński, 1968d: 445)
Yllenus staregai Punda, 1975 = Yllenus kulczynskii Punda, 1975 (Logunov, 1992c: 67)
Nomina dubia:
Yllenus brueggeri Lebert, 1877: 313, f. 48-49 (f, Switzerland) -- Lessert, 1910b: 600
Yllenus pusio (Simon, 1871: 161, originally in Attus; replacement name for Attus pulex Simon, 1868b: 613, j, Portugal or Spain, preoccupied by Hentz, 1846, see Naphrys pulex) -- Logunov & Marusik, 2003a: 157