Notes on Mediterranean Theridiidae (Araneae) – II

Notes on the behavior of the kleptoparasitic spider Argyrodes elevatus ( Theridiidae , Araneae ) 1 MARCO

* Arthropods Laboratory, Butantan Institute. Avenida Vital Brazil, 1500, Postal Code 05503-900. email: [email protected] ** Program of Post-Graduation in Animal Diversity, Federal University of Bahia; Program of Post-Graduation in Neurosciences and Behavior, University of São Paulo. 1. This paper is part of a Master’s study defended by M. C. Silveira at the Post-Graduate Program in Neurosci...

‘Rectangular orb’ webs of Synotaxus (Araneae: Theridiidae)

Morphology and Evolution of Cobweb Spider Male Genitalia (araneae, Theridiidae)

This study elucidates the homology of elements of the male palps in the spider family Theridiidae. We survey and illustrate 60 species from 29 out of the 86 currently recognized genera representing all subfamilies. The study is buttressed by a phylogenetic framework, and uses a new method to evaluate critically competing homology hypotheses based on various criteria. Among the classic criteria ...

Ultralow oxygen treatment for control of Latrodectus hesperus (Araneae: Theridiidae) on harvested table grapes.

The spider Latrodectus hesperus Chamberlin & Ivie (Araneae: Theridiidae) was subjected to low and ultralow oxygen (ULO) treatments at different temperatures. Complete control of the spiders was achieved in 24-h ULO treatments with 0.5% O2 or lower at 1 degrees C and in a 24-h low oxygen (2%) treatment at 15 degrees C. Oxygen level and temperature greatly affected spider mortality. At 1 degrees ...

New Species of Endemic Kleptoparasitic Spiders of the Genus Argyrodes (Araneae: Theridiidae) in the Hawaiian Islands

This study examined the endemic species of kleptoparasitic spiders in the genus Argyrodes from the Hawaiian Islands, a lineage previously known in the archipelago from only a single described species, Argyrodes hawaiiensis Simon. Here, two additional endemic species are described, A. ilipoepoe Rivera and Gillespie, n. sp., and A. laha Rivera and Gillespie, n. sp., with their biogeographical pat...