Di seguito sono descritte tutte le specie della famiglia di ragni Linyphiidae, i cui generi sono compresi fra la lettera iniziale R e la Z, note al 30 dicembre 2007.

Racata Racata Racata grata Specie tipo del genere. — Krakatoa

Rhabdogyna Rhabdogyna Rhabdogyna chiloensis — Cile Rhabdogyna patagonica () — Cile

Ringina Ringina Ringina antarctica () — Isola Crozet

Russocampus Russocampus Russocampus polchaninovae — Russia

Ryojius Ryojius Ryojius japonicus — Giappone Ryojius nanyuensis () — Cina Ryojius occidentalis — Giappone

Saaristoa

Saaristoa Saaristoa abnormis () — Regione paleartica Saaristoa ebinoensis () — Giappone Saaristoa firma () — Europa Saaristoa nipponica () — Giappone Saaristoa sammamish () — USA

Sachaliphantes Sachaliphantes Sachaliphantes sachalinensis () — Russia, Cina, Giappone

Saitonia Saitonia Saitonia kawaguchikonis — Giappone Saitonia longicephala () — Giappone Saitonia muscus () — Giappone Saitonia ojiroensis () — Giappone Saitonia orientalis () — Giappone

Saloca Saloca Saloca diceros () — Europa Saloca gorapaniensis — Nepal Saloca khumbuensis — Nepal Saloca kulczynskii — Europa centrale e orientale Saloca ryvkini — Russia

Satilatlas Satilatlas Satilatlas arenarius () — USA, Canada Satilatlas britteni () — Europa Satilatlas carens — Canada Satilatlas gentilis — USA Satilatlas gertschi — Canada Satilatlas insolens — USA Satilatlas marxi — Russia, Alaska, Canada Satilatlas marxi matanuskae () — Alaska Satilatlas monticola — USA

Sauron Sauron Sauron fissocornis — Russia, Kazakistan Sauron rayi () — Europa

Savignia Savignia Savignia amurensis — Russia Savignia badzhalensis — Russia Savignia basarukini — Russia Savignia birostra () — Russia, Alaska Savignia borea — Russia Savignia bureensis — Russia Savignia centrasiatica — Russia Savignia erythrocephala () — Australia occidentale Savignia eskovi — Russia Savignia frontata — Regione paleartica Savignia fronticornis () — Mediterraneo Savignia harmsi — Spagna Savignia kartalensis — Isole Comore Savignia kawachiensis — Giappone Savignia naniplopi — Creta Savignia nenilini — Russia Savignia producta — Regione paleartica Savignia pseudofrontata — Corea Savignia saitoi — Russia Savignia superstes — Francia Savignia ussurica — Russia Savignia yasudai () — Giappone Savignia zero — Russia

Savigniorrhipis Savigniorrhipis Savigniorrhipis acoreensis — Isole Azzorre Savigniorrhipis grandis — Isole Azzorre

Scandichrestus Scandichrestus Scandichrestus tenuis () — Svezia, Finlandia, Russia

Schistogyna Schistogyna Schistogyna arcana — Isole Juan Fernandez

Sciastes Sciastes Sciastes carli () — Francia, Italia, Svizzera, Austria Sciastes dubius () — Russia, Canada, USA Sciastes extremus — Canada, Groenlandia Sciastes hastatus — USA, Canada Sciastes hyperboreus () — Russia Sciastes mentasta () — Canada, Alaska Sciastes tenna — USA Sciastes truncatus () — USA, Canada, Alaska

Scirites Scirites Scirites finitimus — USA, Canada Scirites pectinatus () — USA, Canada

Scironis Scironis Scironis sima — USA Scironis tarsalis () — USA

Scolecura Scolecura Scolecura cambara — Brasile Scolecura cognata — Colombia Scolecura parilis — Brasile, Argentina Scolecura propinqua — Argentina

Scolopembolus Scolopembolus Scolopembolus littoralis () — USA

Scotargus Scotargus Scotargus enghoffi — Isole Canarie Scotargus grancanariensis — Isole Canarie Scotargus numidicus — Algeria Scotargus pilosus — Regione paleartica Scotargus secundus — Isole Canarie Scotargus tenerifensis — Isole Canarie

Scotinotylus Scotinotylus Scotinotylus alienus () — Russia, Alaska, Canada Scotinotylus allocotus — USA Scotinotylus alpigena () — Regione paleartica Scotinotylus alpinus () — Russia, Mongolia, Alaska, Canada, USA, Groenlandia Scotinotylus altaicus — Russia Scotinotylus ambiguus — USA, Canada Scotinotylus amurensis — Russia Scotinotylus antennatus () — Europa Scotinotylus apache () — USA Scotinotylus autor () — USA Scotinotylus bicavatus — USA Scotinotylus bodenburgi () — Alaska Scotinotylus boreus — Canada Scotinotylus castoris () — USA Scotinotylus clavatus () — Svizzera, Austria Scotinotylus columbia () — Canada Scotinotylus crinitis — USA Scotinotylus dubiosus — USA Scotinotylus eutypus () — Regione olartica Scotinotylus evansi () — Groenlandia, Regione paleartica Scotinotylus exsectoides — Canada Scotinotylus formicarius () — USA Scotinotylus gracilis — USA Scotinotylus humilis — USA Scotinotylus kenus () — USA Scotinotylus kimjoopili — Russia Scotinotylus kolymensis — Russia Scotinotylus levii — Russia Scotinotylus majesticus () — Alaska, Canada, USA Scotinotylus millidgei — Russia Scotinotylus montanus — USA Scotinotylus pallidus () — USA, Canada Scotinotylus patellatus () — Alaska, Canada, USA Scotinotylus pollucis — USA Scotinotylus protervus () — Russia, Mongolia, Alaska, Canada Scotinotylus provincialis — Francia Scotinotylus provo () — USA Scotinotylus regalis — USA Scotinotylus sacer () — Regione olartica Scotinotylus sacratus — USA Scotinotylus sagittatus — USA Scotinotylus sanctus () — USA, Canada Scotinotylus sintalutus — Canada Scotinotylus tianschanicus — Asia Centrale Scotinotylus venetus () — Italia Scotinotylus vernalis () — USA, Canada

Scylaceus Scylaceus Scylaceus pallidus () — USA, Canada Scylaceus selma () — USA

Scyletria Scyletria Scyletria inflata — USA, Canada Scyletria jona — USA

Selenyphantes Selenyphantes Selenyphantes longispinosus () — Messico, Guatemala

Semljicola Semljicola Semljicola alticola () — Svezia, Finlandia, Russia Semljicola angulatus () — Scandinavia, Russia, Mongolia, Sakhalin Semljicola arcticus () — Russia Semljicola barbiger () — Svezia, Finlandia, Russia, Kazakistan Semljicola beringianus () — Russia Semljicola caliginosus () — Inghilterra, Scozia, Russia Semljicola convexus () — Russia, Alaska, Canada Semljicola faustus () — Regione paleartica Semljicola lapponicus () — Scandinavia, Russia, Alaska Semljicola latus () — Scandinavia, Russia, Mongolia Semljicola obtusus () — USA, Canada, Groenlandia Semljicola qixiensis () — Cina Semljicola simplex () — Russia Semljicola thaleri () — Russia, Kazakistan

Sengletus Sengletus Sengletus extricatus () — Egitto, Israele, Iran Sengletus latus — Iran

Shaanxinus Shaanxinus Shaanxinus anguilliformis () — Cina Shaanxinus rufus — Cina

Shanus Shanus Shanus taibaiensis — Cina

Sibirocyba Sibirocyba Sibirocyba incerta () — Svezia, Russia

Silometopoides Silometopoides Silometopoides asiaticus () — Kazakistan Silometopoides koponeni () — Russia Silometopoides mongolensis — Russia, Mongolia Silometopoides pampia () — Russia, Canada, Groenlandia Silometopoides pingrensis () — USA Silometopoides sibiricus () — Russia Silometopoides sphagnicola — Russia Silometopoides tibialis () — Russia, Mongolia

Silometopus Silometopus Silometopus acutus — Svezia, Polonia, Russia Silometopus ambiguus () — Europa Silometopus bonessi — Belgio, Svizzera, Austria, Germania, Slovacchia Silometopus braunianus — Italia Silometopus curtus () — Europa Silometopus elegans () — Regione paleartica Silometopus incurvatus () — Regione paleartica Silometopus nitidithorax () — Francia Silometopus reussi () — Regione paleartica Silometopus rosemariae — Germania, Svizzera, Austria, Italia Silometopus sachalinensis () — Russia Silometopus tenuispinus — Francia, Andorra Silometopus uralensis — Russia

Simplicistilus Simplicistilus Simplicistilus tanuekes — Africa occidentale e centrale

Sinolinyphia Sinolinyphia Sinolinyphia henanensis () — Cina

Sintula Sintula Sintula affinioides — Transilvania (Romania) Sintula corniger () — dall'Europa all'Azerbaigian Sintula cretaensis — Creta Sintula criodes () — Ucraina Sintula cristatus — Turchia Sintula diceros — Francia Sintula furcifer () — Spagna, Marocco, Algeria Sintula orientalis — Algeria Sintula oseticus — Russia Sintula penicilliger () — Algeria Sintula pseudocorniger — Algeria, Tunisia Sintula retroversus () — dall'Europa all'Azerbaigian Sintula roeweri — Montenegro Sintula spiniger () — Austria, Europa orientale Sintula subterminalis — Algeria

Sisicottus Sisicottus Sisicottus aenigmaticus — USA Sisicottus crossoclavis — USA, Canada Sisicottus cynthiae — USA Sisicottus montanus () — USA, Canada Sisicottus montigenus — USA Sisicottus nesides () — USA, Canada, Alaska Sisicottus orites () — USA, Canada Sisicottus panopeus — USA, Canada, Isole Curili Sisicottus quoylei — USA, Canada

Sisicus Sisicus Sisicus apertus () — Regione olartica Sisicus penifusifer — USA, Canada Sisicus volutasilex — Canada

Sisis Sisis Sisis plesius () — USA Sisis rotundus () — USA, Canada

Sisyrbe Sisyrbe Sisyrbe rustica () — USA

Sitalcas Sitalcas Sitalcas ruralis — USA

Smermisia Smermisia Smermisia caracasana — Venezuela Smermisia esperanzae () — Cile Smermisia holdridgi — Costa Rica Smermisia parvoris — Brasile, Argentina Smermisia vicosana () — Brasile, Argentina

Smodix Smodix Smodix reticulata () — USA, Canada

Solenysa Solenysa Solenysa akihisai — Giappone Solenysa geumoensis — Corea Solenysa lanyuensis — Taiwan Solenysa longqiensis — Cina, Taiwan Solenysa melloteei — Giappone Solenysa ogatai — Giappone Solenysa partibilis — Giappone Solenysa protrudens — Cina Solenysa reflexilis — Giappone Solenysa retractilis — Cina Solenysa tianmushana — Cina Solenysa wulingensis — Cina Solenysa yangmingshana — Taiwan

Soucron Soucron Soucron arenarium () — USA, Canada

Souessa Souessa Souessa spinifera () — USA

Souessoula Souessoula Souessoula parva () — USA

Sougambus Sougambus Sougambus bostoniensis () — USA, Canada

Souidas Souidas Souidas tibialis () — USA

Soulgas Soulgas Soulgas corticarius () — USA

Spanioplanus Spanioplanus Spanioplanus mitis — Venezuela, Perù

Sphecozone Sphecozone Sphecozone altehabitans () — Perù Sphecozone alticeps — Colombia Sphecozone araeonciformis () — Argentina Sphecozone bicolor () — Cile, Argentina Sphecozone capitata — Perù Sphecozone castanea () — Brasile Sphecozone corniculans — Colombia Sphecozone cornuta — Argentina Sphecozone crassa () — Colombia, Brasile Sphecozone crinita — Ecuador Sphecozone diversicolor () — Brasile, Argentina Sphecozone fastibilis () — Brasile, Argentina Sphecozone formosa () — Ecuador Sphecozone gravis () — Bolivia Sphecozone ignigena () — Brasile, Argentina Sphecozone labiata () — Brasile Sphecozone lobata — Isole Juan Fernandez Sphecozone longipes () — Perù Sphecozone magnipalpis — USA Sphecozone melanocephala () — Brasile Sphecozone modesta () — Bolivia, Brasile, Cile, Argentina Sphecozone modica — Argentina Sphecozone nigripes — Perù Sphecozone nitens — Ecuador, Perù Sphecozone niwina () — Perù, Bolivia, Cile Sphecozone novaeteutoniae () — Brasile Sphecozone personata () — Brasile Sphecozone rostrata — Brasile Sphecozone rubescens — Brasile, Paraguay, Argentina Sphecozone rubicunda () — Perù Sphecozone spadicaria () — Colombia, Trinidad, Venezuela Sphecozone tumidosa () — Brasile, Argentina Sphecozone varia — Perù Sphecozone venialis () — Brasile, Argentina

Spiralophantes Spiralophantes Spiralophantes mirabilis — Nepal

Spirembolus Spirembolus Spirembolus abnormis — USA, Canada Spirembolus approximatus () — USA Spirembolus bilobatus () — USA Spirembolus cheronus — USA Spirembolus chilkatensis () — USA, Alaska Spirembolus demonologicus () — USA Spirembolus dispar — USA Spirembolus elevatus — USA Spirembolus erratus — USA Spirembolus falcatus — USA Spirembolus fasciatus () — USA Spirembolus fuscus — USA Spirembolus hibernus — USA Spirembolus humilis — USA Spirembolus latebricola — USA Spirembolus levis — USA, Messico Spirembolus maderus — USA Spirembolus mendax — USA Spirembolus mirus — USA Spirembolus monicus () — USA Spirembolus monticolens () — USA, Canada