By C. D. Dondale, J. H. Redner, P. Paquin
Read Online or Download The Orb-Weaving Spiders of Canada and Alaska: Uloboridae, Tetragnathidae, Araneidae, Theridiosomatidae) the Insects and Arachnids of Canada PDF
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Extra resources for The Orb-Weaving Spiders of Canada and Alaska: Uloboridae, Tetragnathidae, Araneidae, Theridiosomatidae) the Insects and Arachnids of Canada
Sample text
The male’s chemosensory setae are situated on the tips of the palpi and legs (Foelix 1996). Courtship in orb weavers tends to be a prolonged timorous affair and mating a brief resolute one. Blanke (1986) gives details for the Cross Orbweaver spider. The male, having charged his palpi with semen and found the female’s web, begins by tweaking the peripheral threads and vibrating his abdomen vigorously. In this way he signals his presence from a distance while his escape route remains open. If the female is receptive, she signals her response by plucking the threads in turn.
Qxd 14/03/2003 4:27 PM Page 55 3(2). Abdomen with distinct pointed extension posteriorly beyond spinnerets (Figs. 52, 55) . . . . . . . . . . . . caudata Emerton (p. 60) 3'. Abdomen without pointed extension posteriorly beyond spinnerets . 4 4(3'). Conductor with one or more high thin ridges at base (Figs. 5 4'.
Epigynum (Figs. 25–27) with posterior plate large, distinctly visible in ventral view. qxd 14/03/2003 3:31 PM Page 40 Map 2. Collection localities of Hyptiotes gertschi. Range. Southernmost Alaska to Newfoundland, south to California and Pennsylvania. Comments. Specimens of H. gertschi are distinguished from those of other species in the genus by the slender process on the palpal conductor of males and by the large posterior plate of the epigynum. Biology. Webs of individuals of H. gertschi may be abundant among the dead interior branches near the bottom of pine trees.