この項はイトグモ科の Aug. 21, 2009.までの属種の一覧を示す。

Loxosceles
Loxosceles Heineken & Lowe, 1832
 Loxosceles accepta Chamberlin, 1920 — Peru
 Loxosceles adelaida Gertsch, 1967 — Brazil
 Loxosceles alamosa Gertsch & Ennik, 1983 — Mexico
 Loxosceles alicea Gertsch, 1967 — Peru
 Loxosceles amazonica Gertsch, 1967 — Brazil
 Loxosceles anomala (Mello-Leitão, 1917) — Brazil
 Loxosceles apachea Gertsch & Ennik, 1983 — USA, Mexico
 Loxosceles aphrasta Wang, 1994 — China
 Loxosceles aranea Gertsch, 1973 — Mexico
 Loxosceles arizonica Gertsch & Mulaik, 1940 — USA
 Loxosceles aurea Gertsch, 1973 — Mexico
 Loxosceles baja Gertsch & Ennik, 1983 — Mexico
 Loxosceles barbara Gertsch & Ennik, 1983 — Mexico
 Loxosceles belli Gertsch, 1973 — Mexico
 Loxosceles bettyae Gertsch, 1967 — Peru
 Loxosceles blancasi Gertsch, 1967 — Peru
 Loxosceles blanda Gertsch & Ennik, 1983 — USA
 Loxosceles boneti Gertsch, 1958 — Mexico, El Salvador
 Loxosceles candela Gertsch & Ennik, 1983 — Mexico
 Loxosceles caribbaea Gertsch, 1958 — Greater Antilles
 Loxosceles carmena Gertsch & Ennik, 1983 — Mexico
 Loxosceles chinateca Gertsch & Ennik, 1983 — Mexico
 Loxosceles colima Gertsch, 1958 — Mexico
 Loxosceles conococha Gertsch, 1967 — Peru
 Loxosceles coquimbo Gertsch, 1967 — Chile
 Loxosceles coyote Gertsch & Ennik, 1983 — Mexico
 Loxosceles cubana Gertsch, 1958 — Cuba, Bahama Islands
 Loxosceles deserta Gertsch, 1973 — USA, Mexico
 Loxosceles devia Gertsch & Mulaik, 1940 — USA, Mexico
 Loxosceles fontainei Millot, 1941 — Guinea
 Loxosceles foutadjalloni Millot, 1941 — Guinea
 Loxosceles francisca Gertsch & Ennik, 1983 — Mexico
 Loxosceles frizzelli Gertsch, 1967 — Peru
 Loxosceles gaucho Gertsch, 1967 — Brazil, Tunisia
 Loxosceles gloria Gertsch, 1967 — Ecuador, Peru
 Loxosceles guatemala Gertsch, 1973 — Guatemala
 Loxosceles harrietae Gertsch, 1967 — Peru
 Loxosceles herreri Gertsch, 1967 — Peru
 Loxosceles hirsuta Mello-Leitão, 1931 — Brazil, Paraguay, Argentina
 Loxosceles huasteca Gertsch & Ennik, 1983 — Mexico
 Loxosceles immodesta (Mello-Leitão, 1917) — Brazil
 Loxosceles inca Gertsch, 1967 — Peru
 Loxosceles insula Gertsch & Ennik, 1983 — Mexico
 Loxosceles intermedia Mello-Leitão, 1934 — Brazil, Argentina
 Loxosceles jaca Gertsch & Ennik, 1983 — Mexico
 Loxosceles jamaica Gertsch & Ennik, 1983 — Jamaica
 Loxosceles jarmila Gertsch & Ennik, 1983 — Jamaica
 Loxosceles julia Gertsch, 1967 — Peru
 Loxosceles kaiba Gertsch & Ennik, 1983 — USA
 Loxosceles lacroixi Millot, 1941 — Ivory Coast
 Loxosceles lacta Wang, 1994 — China
 Loxosceles laeta (Nicolet, 1849) — America, Finland, Australia
 Loxosceles lawrencei Caporiacco, 1955 — Venezuela, Trinidad, Curaçao
 Loxosceles lutea Keyserling, 1877 — Colombia, Ecuador
 Loxosceles luteola Gertsch, 1973 — Mexico
 Loxosceles manuela Gertsch & Ennik, 1983 — Mexico
 Loxosceles martha Gertsch & Ennik, 1983 — USA
 Loxosceles meruensis Tullgren, 1910 — Tanzania
 Loxosceles misteca Gertsch, 1958 — Mexico
 Loxosceles mrazig Ribera & Planas, 2009 — Tunisia
 Loxosceles mulege Gertsch & Ennik, 1983 — Mexico
 Loxosceles nahuana Gertsch, 1958 — Mexico
 Loxosceles neuvillei Simon, 1909 — Somalia, East Africa
 Loxosceles olmea Gertsch, 1967 — Peru
 Loxosceles pallidecolorata (Strand, 1906) — Ethiopia
 Loxosceles palma Gertsch & Ennik, 1983 — USA, Mexico
 Loxosceles panama Gertsch, 1958 — Panama
 Loxosceles parrami Newlands, 1981 — South Africa
 Loxosceles piura Gertsch, 1967 — Peru
 Loxosceles pucara Gertsch, 1967 — Peru
 Loxosceles puortoi Martins, Knysak & Bertani, 2002 — Brazil
 Loxosceles reclusa Gertsch & Mulaik, 1940 — ドクイトグモ・北アメリカ
 Loxosceles rica Gertsch & Ennik, 1983 — Costa Rica
 Loxosceles rosana Gertsch, 1967 — Peru
 Loxosceles rothi Gertsch & Ennik, 1983 — Mexico
 Loxosceles rufescens (Dufour, 1820) — イトグモ・汎世界に分布、日本にも移入。
 Loxosceles rufipes (Lucas, 1834) — Guatemala, Panama, Colombia
 Loxosceles russelli Gertsch & Ennik, 1983 — USA
 Loxosceles sabina Gertsch & Ennik, 1983 — USA
 Loxosceles seri Gertsch & Ennik, 1983 — Mexico
 Loxosceles similis Moenkhaus, 1898 — Brazil
 Loxosceles smithi Simon, 1897 — Ethiopia
 Loxosceles sonora Gertsch & Ennik, 1983 — Mexico
 Loxosceles spadicea Simon, 1907 — Peru, Bolivia, Argentina
 Loxosceles speluncarum Simon, 1893 — South Africa
 Loxosceles spinulosa Purcell, 1904 — Southern Africa
 Loxosceles surca Gertsch, 1967 — Peru
 Loxosceles taeniopalpis Simon, 1907 — Ecuador
 Loxosceles taino Gertsch & Ennik, 1983 — Bahama Islands, Jamaica, Hispaniola
 Loxosceles tehuana Gertsch, 1958 — Mexico
 Loxosceles tenango Gertsch, 1973 — Mexico
 Loxosceles teresa Gertsch & Ennik, 1983 — Mexico
 Loxosceles tlacolula Gertsch & Ennik, 1983 — Mexico
 Loxosceles valdosa Gertsch, 1973 — Mexico
 Loxosceles valida Lawrence, 1964 — South Africa
 Loxosceles variegata Simon, 1897 — Paraguay
 Loxosceles virgo Gertsch & Ennik, 1983 — Virgin Islands
 Loxosceles vonwredei Newlands, 1980 — Namibia
 Loxosceles weyrauchi Gertsch, 1967 — Peru
 Loxosceles yucatana Chamberlin & Ivie, 1938 — Mexico, Belize, Guatemala
 Loxosceles zapoteca Gertsch, 1958 — Mexico

Sicarius
Sicarius Walckenaer, 1847
 Sicarius albospinosus Purcell, 1908 — South Africa
 Sicarius crustosus (Nicolet, 1849) — Chile
 Sicarius damarensis Lawrence, 1928 — Namibia
 Sicarius deformis (Nicolet, 1849) — Chile
 Sicarius dolichocephalus Lawrence, 1928 — Namibia
 Sicarius fumosus (Nicolet, 1849) — Chile
 Sicarius gracilis (Keyserling, 1880) — Peru
 Sicarius hahni (Karsch, 1878) — Namibia
 Sicarius lanuginosus (Nicolet, 1849) — Chile
 Sicarius minoratus (Nicolet, 1849) — Chile
 Sicarius nicoleti (Keyserling, 1880) — Chile
 Sicarius patagonicus Simon, 1919 — Argentina
 Sicarius peruensis (Keyserling, 1880) — Peru
 Sicarius rubripes (Nicolet, 1849) — Chile
 Sicarius rugosus (F. O. P.-Cambridge, 1899) — El Salvador, Costa Rica
 Sicarius rupestris (Holmberg, 1881) — Argentina
 Sicarius spatulatus Pocock, 1900 — South Africa
 Sicarius terrosus (Nicolet, 1849) — Chile, Argentina, Peru
 Sicarius terrosus yurensis Strand, 1908 — Peru
 Sicarius testaceus Purcell, 1908 — South Africa
 Sicarius tropicus (Mello-Leitão, 1936) — Brazil
 Sicarius utriformis (Butler, 1877) — Galapagos Islands