TitlePredatory behaviour of the social orb-weaver spider, Geratonephila burmanica n. gen., n. sp (Araneae: Nephilidae) with its wasp prey, Cascoscelio incassus n. gen., n. sp (Hymenoptera: Platygastridae) in Early Cretaceous Burmese amber
Publication TypeJournal Article
Year of Publication2012
AuthorsPoinar, GO, Buckley, R
JournalHistorical Biology
Volume24
Pagination519-525
Type of ArticleJournal Article
ISSN0891-2963
Abstract

The present work shows predatory behaviour of the social orb-weaver spider, Geratonephila burmanica n. gen., n. sp. (Araneae: Nephilidae) against a parasitic wasp, Cascoscelio incassus n. gen., n. sp. (Hymenoptera: Platygastridae) in Early Cretaceous Burmese amber. An adult male and juvenile of G. burmanica in the same web provide the first fossil evidence of sociality in spiders. The spider is characterised by a pedipalp with a hemispherical tegulum, a subtegulum curved at 180 degrees and an apical spiralled embolas-conductor bent approximately 45 degrees at midpoint. The male wasp is characterised by an ocellar tubercle, 12-segmented antennae with a feeble five-segmented clava, thick sensilla trichodea curvata with rounded ends on the claval antennomeres, a short uncus, a short post-marginal vein and a nebulose radial sector (Rs) vein extending from the uncus to the costal margin of the forewing. This is the first fossil evidence of spider sociality and a fossil spider attacking prey trapped in its web.

URL<Go to ISI>://WOS:000308765200006
DOI10.1080/08912963.2011.640399