... the collective effect of hairy foot pads in the hunting spider Cupiennius salei (Arachnida, Ctenidae), we performed vertical pulling experiments combined with stepwise disabling of the pads. We found the attachment force of the spider to be not simply the sum of single leg forces because with leg pair...

...Eva Orlando; Axel Schmid SUMMARY The nocturnal wandering spider Cupiennius salei has one pair of principal eyes and three pairs of secondary eyes located on the prosoma, which differ in both morphology and function. Their spectral sensitivity, measured with intracellular recordings, is due to three...

...Daniela Neuhofer; Rudi Machan; Axel Schmid SUMMARY Like most other spiders Cupiennius salei (Keyserling 1877) has two different eye types, one pair of principal eyes and three pairs of secondary eyes. The principal eyes have two eye muscles each, which allow movement of the retina and are mainly...

...Heinz Malli; Lucia Kuhn-Nentwig; Hans Imboden; Wolfgang Nentwig ABSTRACT Previous experimental studies have shown that neotropical wandering spiders ( Cupiennius salei ) inject more venom when attacking larger crickets. It has been postulated that this is a consequence of predator–prey interactions...

...Axel Schmid ABSTRACT The Central American hunting spider Cupiennius salei Keys relies mainly on its mechanosensory systems during prey-catching and mating behaviour. The behavioural relevance of its eight eyes has not been studied before, although their optics and sensitivity suggest highly...

...Florian Kaps; Axel Schmid ABSTRACT Like most spiders, the nocturnal hunting spider Cupiennius salei is able to move the retinae of its antero-median (AM) eyes. In the present study, the morphological and physiological properties of the eye muscles and the mechanism and behavioural relevance...

...R. J. Paul; A. Pfeffer-Seidl; R. Efinger; H. O. Pörtner; H. Storz ABSTRACT The relationships between and pH were determined in cell-free undiluted haemolymph of the arachnids Eurypelma californicum, Pandinus imperator and Cupiennius salei . The pH/bicarbonate diagrams and the CO 2 equilibrium...

...R. J. Paul; B. Bergner; A. Pfeffer-Seidl; H. Decker; R. Efinger; H. Storz ABSTRACT Oxygen equilibrium curves and the relationships between the partial pressure of CO 2 and pH were determined for the haemolymph of the arachnids Eurypelma californicum, Pandinus imperator and Cupiennius salei . A new...

...Friedrich G. Barth; Takanao Nakagawa; Eisuke Eguchi ABSTRACT Electroretinograms were recorded from all eyes of the wandering spider Cupiennius salei (Ctenidae) and were found to be simple cornea-negative potential differences with amplitudes of up to 10mV. In both the principal eyes and all...

...M. F. Land; F. G. Barth ABSTRACT Much is known about the mechanosensory behaviour of the spider Cupiennius salei Keyserling, but much less about its visual capabilities. In this study the quality of the optical image, the retinal resolution and the fields of view were assessed for each of the four...