New data on Latrodectus tredecimguttatus Rossi, 1790, the medically important spider species from Iran (Araneae: Theridiidae)

Document Type: Original Articles

Authors

1 Department of Medical Entomology and Vector Control, School of Public Health, Urmia University of Medical Sciences, Urmia, Iran

2 Department of Biology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran

3 Department of Epidemiology, School of Medicine, Urmia University of Medical Sciences, Iran

4 Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

5 Disease Control Unit, Makoo Health Center, Urmia University of Medical Sciences, Urmia, Iran

Abstract

Spiders are one of the most important orders of Arachnida comprising more than 48000 species in the world, except for families Uloboridae and Holarchaeidae all others are classified as venomous spider, but only about 200 species are medically relivant which caused public health problems or even death .in Iran there 51 families and 763 species of spiders. Of them the families, Theridiidae and Sicariidae are dangerous for human that the first one is more prevalent in Iran, the Latrodectus considered as one of the most poisonous spiders in the world and Iran. This genus has and five species in Iran. Among which Latrodectus tredecimguttatus (black widow spider or dolmak) considered as one of the most poisonous spiders in Iran, so we searched for this species in Northwest of Iran (provinces of West Azerbaijan, East Azerbaijan and Ardabil). Spatial distribution maps were intruced using GIS 9.4.
In this study we searched for this medically relevant species from various habitats in West and East Azerbaijan and Ardabil Provinces, northwestern Iran. Spatial distribution maps were prod
We could find five adult females from Germi and Ardabil cities (Ardabil Province), Ahar County (East Azerbaijan) and Urmia city (West Azerbaijan), the presence of this species from Ardabil province is for the first time.
So the presence of Latrodectus species under the rocks in Wheat fields from this corner of the Iran may be an alarm for farmers and visitors to use gloves and aware the people from doing any disturbing activity which make the spiders aggressive.

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