National Institute for Environmental Studies Invasive Species of Japan Japanese | English
  1. Invasive Species of Japan >
  2. Invertebrates (except insects) >
  3. Latrodectus hasselti

Latrodectus hasselti

Basic information
Scientific name Latrodectus hasselti

Click to magnify

Common names redback widow spider
Higher taxon Theridiidae, Araneae, Arachnida, Arthropoda
Natural range Possibly Australia, but ambiguous
Invasion information
Range in Japan Recorded in All prefectures except 2 prefectures (Aomori and Akita prefs). Abundant in Kinki and Tokai District (central Japan). Range in Japan
Origin Unknown.
Date The first record was in 1995.
Route Accidental: With building material or some other transportation.
Impact Venomous.
Regulation in Japan Import, transport and keeping are legally restricted in Japan.
Introduced range in other countries USA, etc.
Reference Notes
  • Ikeda (supervising) DECO (ed) (2006) Dictionary of Alien Species. Tokyo-Shoseki. (in Jpn)
  • Murakami & Washitani (supervising) Ecol. Soc. Japan (ed) (2002) Handbook of Alien Species in Japan. Chijin-Shokan. (in Jpn)
  • Ori et al. (1996) Introduction of widow spiders into Japan. Med Entomol Zool. 47(2):111-119. (English abstract)
  • Taki (supervising) JWRC (ed) (2008) A Photographic Guide to the Invasive Alien Species in Japan. Heibonsha. (in Jpn)
  • etc.
100 of the Japan’s Worst Invasive Alien Species
Latrodectus spp. is designated as a invasive alien species from October 2015