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...

First record of Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) for Hidalgo, Mexico whit data about his distribution in North America

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First record of Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) for Hidalgo, Mexico whit data about his distribution in North America


ABSTRACT 

Worldwide, the genus Euryopis has 81 species, its distribution is known to be cosmopolitan, 23 species of the genus are currently known in North America. This work records Euryopis scriptipes for the first time based of the review of a male and female for the state of Hidalgo, Mexico, as well providing data on its current distribution in North America. This new record expands the distribution of E. scriptipes in this biogeographical region.

Sánchez-Vega, U., Vargas , C. F. ., Callejas-Chavero, A. ., Flores-Martínez, A. y Villegas-Guzmán, G. A. . (2023) «Primer registro de Euryopis scriptipes Banks, 1908 (Araneae: Theridiidae) para Hidalgo, México con datos sobre su distribución en Norteamérica», Acta Zoológica Lilloana, 67(1), pp. 45–50. doi: 10.30550/j.azl/2023.67.1/2023-01-09.