Spider-egg-sac-parasite
Guides
Agrothereutes abbreviatus rufopectus
Agrothereutes abbreviatus rufopectus is a subspecies of ichneumon wasp described by Cushman in 1927. The species Agrothereutes abbreviatus is a known parasitoid of spider egg sacs, including those of the orb-weaving spider Argiope aurantia. The subspecies rufopectus has been recorded from Belgium and Canada.
Arachnophaga
Arachnophaga is a genus of parasitoid wasps in the family Eupelmidae. The genus has been documented infesting egg sacs of bolas spiders (genus Mastophora). As a member of Eupelmidae, it belongs to a family known for diverse parasitoid lifestyles targeting arthropod hosts.
Pseudogaurax signatus
frit fly
Pseudogaurax signatus is a species of frit fly in the family Chloropidae, first described by Loew in 1876. The species has been documented as a parasite of spider egg sacs, specifically those of the black and yellow garden spider Argiope aurantia. This parasitic relationship was recorded in a 1993 study by Lockley and Young, which identified P. signatus as one of the chief parasites emerging from A. aurantia egg sacs alongside the ichneumon wasp Tromatopia rufopectus. The species belongs to a genus that includes other parasitoid members, with the congeneric species Pseudogaurax paratolmos being the first chloropid fly discovered to parasitize ants.