Abstract
BackgroundCalathotarsus simoni Schiapelli & Gerschman 1975 is the only species of Migidae in Argentina. It is a rare and endemic spider only found in relict grassland of mountain systems in the province of Buenos Aires. This species is a habitat specialist spider occupying specific areas with certain microclimatic conditions on hilly and rocky grassland areas at about 500-1500 meters above sea level.New informationThe observed extent of occurrence (EOO) is 7207 km2 and the area of occupancy (AOO) is 16 km2. Two locations are identified based on the threat event related to the invasion of the species habitat by alien woody plants. In addition, intensive cattle production and agriculture also constitute relevant threats to the species.
Highlights
Trapdoor spiders belong to the infraorder Mygalomorphae and include species that dig burrows into the ground, sealed with a lid or “trapdoor”
Members of the mygalomorph family Migidae are known from Australia, Africa, Madagascar, New Zealand, New Caledonia and the southern cone of South America: almost all parts of the former supercontinent Gondwanaland, except the Indian subcontinent and Antarctica (Griswold and Ledford 2001)
Calathotarsus simoni is an endemic species from central Argentina living in just some specific areas with certain microclimatic conditions found at hilly and rocky grassland areas at about 500-1500 meters above sea level (Ferretti et al 2014a)
Summary
Trapdoor spiders belong to the infraorder Mygalomorphae and include species that dig burrows into the ground, sealed with a lid or “trapdoor”.
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