Acta Arachnologica
Online ISSN : 1880-7852
Print ISSN : 0001-5202
A revision of the Japanese genera and species of the subfamily Theridiinae (Araneae: Theridiidae)
Hajime Yoshida
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2001 Volume 50 Issue 2 Pages 157-181


A revision of the Japanese genera and species of the subfamily Theridiinae Sundevall 1833 (Araneae: Theridiidae) is given. Hooded paracymbium of male palpus and absence of colulus characterize Theridiinae. Monetinae Simon 1894 and Spintharinae Simon 1894 are newly synonymized with Theridiinae. Keys to the subfamilies of Theridiidae and the genera of Theridiinae are given.
Two genera, Paidiscura Archer 1950 and Rugathodes Archer 1950, are newly recorded from Japan and three new genera, Nipponidion, Takayus and Kejia, are described. Eleven species are newly transferred from Theridion to those genera: P. subpallens (Bösenberg & Strand 1906), R. nigrolimbata (Yaginuma 1972), N. yaeyamense (Yoshida 1993), Ta. takayensis (S. Saito 1939), Ta. chikunii (Yaginuma 1960), Ta. latifolius (Yaginuma 1960), Ta. yunohamensis (Bösenberg & Strand 1906), Ta. subadultus (Bösenberg & Strand 1906), Ta. lyricus (Walckenaer 1842), K. sterninotata (Bösenberg & Strand 1906) and K. mneon (Bösenberg & Strand 1906).
Three new species are described: Nipponidion okinawense, Keijia maculata and Theridula iriomotensis. Theridula albipes S. Saito 1935 described from Sakhalin is newly transferred to Chrysso. Three species names, Chrysso venusta (Yaginuma 1957), C. rapula (Yaginuma 1960) and Theridion adamsoni Berland 1934, are newly synonymized with C. scintillans (Thorell 1895), C. albipes and Keijia mneon, respectively. Neotype of Takayus takayensis (S. Saito 1939) is designated.
Fifteen Chinese or American species of Theridion are newly transferred to the other genera as follows: Takayus kunmingicus (Zhu 1998), Ta. naevius (Zhu 1998), Ta. lushanensis (Zhu 1998), Ta. xui (Zhu 1998), Ta. linimaculatus (Zhu 1998), Ta. wangi (Zhu 1998), Ta. sublatifolius (Zhu 1998), Ta. lunulatus (Guan & Zhu 1993), Ta. huanrenensis(Zhu & Gao 1993), Ta. quadrimaculatus (Song & Kim 1991), Keijia qionghaiensis (Zhu 1998), K. tincta (Walkenaer 1802), K. antoni (Keyserling 1884), K. alabamensis (Gertsch & Archer 1942) and K. punctosparsa (Emerton 1882), .
Three species names, Theridion argyrodiforme Bösenberg & Strand 1906, Th. indicis Bösenberg & Strand 1906 and Th. sagaphilum Strand 1916, are treated as nomina dubia.

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