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...

An integrative study of a new species of Melloina Brignoli: an additional support for Melloinidae new family (Araneae: Mygalomorphae)

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An integrative study of a new species of Melloina Brignoli: an additional support for Melloinidae new family (Araneae: Mygalomorphae)

ABSTRACT

Melloina is a genus that has long occupied an unstable taxonomic position, fluctuating between the families Paratropididae and Theraphosidae. The most recent proposal, in 2020, placed it within Theraphosidae. Alternatively, the phylogenetic relationships among Paratropididae and Theraphosidae have been controversial and subject to revision over time. Early studies suggested Paratropididae as the sister group of Theraphosidae, but recent molecular analyses have revealed that Barychelidae is more closely related to Theraphosidae than Paratropididae (Paratropis). In this study, we describe a new species, Melloina condesa sp. n., based on a morphological and multilocus approach. Phylogenetic results, using a total evidence framework, recovered Melloina as an independent lineage more closely related to Theraphosidae and Barychelidae. Based on these findings and on the comparison of diagnostic characters among the taxa under discussion, we propose a new family, Melloinidae, to include all species of Melloina.

Perafán, C., Montes de Oca, L., & Pérez-Miles, F. (2025). An integrative study of a new species of Melloina Brignoli: an additional support for Melloinidae new family (Araneae: Mygalomorphae). Journal of Natural History, 59(37–40), 2337–2353. https://doi.org/10.1080/00222933.2025.2555445