New Insight Into the Evolutionary Arms Race Between Spider Egg Sac Pseudoparasitoids and Active Maternal Care by the Spiders

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  New Insight Into the Evolutionary Arms Race Between Spider Egg Sac Pseudoparasitoids and Active Maternal Care by the Spiders ABSTRACT Pseudoparasitoids can lead to high mortality in spider egg sacs, and in some cases, they reduce the reproductive success of a spider female to zero. On the other hand, a species that develops within the spider's egg sac uses a limited resource derived from a single egg sac for its larval development. Therefore, the most crucial behaviour that increases the fitness of free-living pseudoparasitoid females is choosing the best host for their offspring. We analysed various points of the counter-adaptations of the spider egg sac pseudoparasitoid and spiders exhibiting active maternal care, utilising the ichneumonid  Hidryta fusiventris  (Thomson, 1873) and the wolf spider  Pardosa lugubris  (Walckenaer, 1802). We showed that the oviposition decision of  H. fusiventris  is based on the spider's egg sac size and that the fema...

Trechona munduruku sp. nov., the first species of Trechona C. L. Koch, 1850 from Brazilian Amazonia (Araneae: Dipluridae)

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Trechona munduruku sp. nov., the first species of Trechona C. L. Koch, 1850 from Brazilian Amazonia (Araneae: Dipluridae)

Abstract
Trechona munduruku sp. nov. is described from Flona do Tapajós, Belterra, Pará, Brazil, based on a holotype male deposited in the Instituto Butantan, São Paulo, Brazil. The new species is the first of the genus known from Brazilian Amazonia. 

Brescovit, Antonio & Sherwood, Danniella & Lucas, Sylvia. (2024). Trechona munduruku sp. nov., the first species of Trechona C. L. Koch, 1850 from Brazilian Amazonia (Araneae: Dipluridae). Arachnology. 19. 1165-1167.