First record of Thaumasia Perty, 1833 nursery web spider (Araneae: Pisauridae) preying upon Polistes canadensis (Linnaeus, 1758) (Hymenoptera: Vespidae) in the Neotropical region

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  First record of Thaumasia Perty, 1833 nursery web spider (Araneae: Pisauridae) preying upon Polistes canadensis (Linnaeus, 1758) (Hymenoptera: Vespidae) in the Neotropical region Abstract Thaumasia Perty, 1833 are opportunistic spiders that inhabit the Neotropical region. This study reports a spider of the genus Thaumasia preying upon Polistes canadensis (Linnaeus, 1758) in semiarid region of Brazil. A spider of the genus Thaumasia was observed moving rapidly from the fountain's water surface to capture an individual of P. canadensis . After successfully capturing the wasp, Thaumasia sp. was observed partially perched on the wall of the fountain, with the prey still on the water surface and trapped by its chelicerae. The pedipalps and chelicerae of Thaumasia sp. manipulated the head of P. canadensis , which stopped moving shortly after being captured, probably because of the action of the spider's venom. The study records a wasp in the diet of Thaumasia based on the ca...

FIRST CHECKLIST OF THE NON-ACARINE ARACHNIDS (CHELICERATA: ARACHNIDA) OF THE CHAPADA DIAMANTINA NATIONAL PARK, BRAZIL

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FIRST CHECKLIST OF THE NON-ACARINE ARACHNIDS (CHELICERATA: ARACHNIDA) OF THE CHAPADA DIAMANTINA NATIONAL PARK, BRAZIL


Abstract

This work aims to provide regionalized information on the non-acarine arachnids inhabiting the Brazilian Chapada Diamantina National Park (PARNA-CD), and its surroundings, to support studies for protecting endemic species and preventing human accidents by these animals. We used registers of five arachnological collections covering 36 years, validated by the world catalogs of each order. We found 67 arachnid species from five orders, 42 families, in the six municipalities surrounding PARNA-CD. Araneae (54 species) and Scorpiones (ten species) were the most representative orders. We found no records of the other orders except for Pseudoscorpiones (two species) and Amblypygi (one species). Only one spider species (Tmesiphantes hypogeus), and two scorpions (Troglorhopalurus lacrau and T. translucidus) were assessed on the IUCN criteria for conservation. Twenty-six species are endemic to Brazil, of which five have no records in any location other than PARNA-CD. At least one medically important species was encountered in each municipality, from the genera: Latrodectus, Loxosceles, Phoneutria, and Tityus. Given the recent rate of human-mediated changes (undue land-use) where several Brazilian caatinga areas were exposed, endemic species from this list should be the priority target for long-term ecological and behavioral studies.

Andrade de Sá, J., Kobler Brazil, T., Emmanuel Soares Barreto, D. and Maria Lira-da-Silva, R. (2025) “FIRST CHECKLIST OF THE NON-ACARINE ARACHNIDS (CHELICERATA: ARACHNIDA) OF THE CHAPADA DIAMANTINA NATIONAL PARK, BRAZIL”, Boletín de la Sociedad Zoológica del Uruguay, 34(1), p. e34.1.5. doi: 10.26462/34.1.5.