Spiders order Araneae are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom ,  and spinnerets that extrude silk. Anatomically, spiders as with all arachnids differ from other arthropods in that the usual body segments are fused into two tagmata , the prosoma , or cephalothorax , and opisthosoma , or abdomen , and joined by a small, cylindrical pedicel however, as there is currently neither paleontological nor embryological evidence that spiders ever had a separate thorax-like division, there exists an argument against the validity of the term cephalothorax, which means fused cephalon head and the thorax. Similarly, arguments can be formed against use of the term abdomen, as the opisthosoma of all spiders contains a heart and respiratory organs, organs atypical of an abdomen . Unlike insects , spiders do not have antennae.
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Authors Authors and affiliations G. Spiders are extremely common inhabitants of most terrestrial communities, yet, compared to other animal taxa, they have only recently become the subject of ecological research Turnbull, ; Witt and Rovner, ; Wise, ; Shear, ; Nentwig, , for reviews.
From the earliest studies, it has been clear that the physiognomy or physical structure of environments has an important influence on the habitat preferences of spider species, and ultimately on the composition of spider communities.
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Ecology of the True Spiders (Araneomorphae)
Habitat Structure pp Cite as. Many spiders build webs for prey capture, and the attachment of these webs to surrounding structures often requires the presence of specific architectural features or arrangements Riechert and Gillespie, Unable to display preview. Download preview PDF. Skip to main content.
Ecology of the true spiders (Araneomorphae)