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Basic characteristics of arachnids include four pairs of legs (1) and a body divided into two segments: the cephalothorax (2) and the abdomen (3). The ventral side of a brown widow spider. The epigastric plates and furrow are visible, as well as the hourglass marking on the underside of the abdomen, which is a characteristic feature of widow ...
Spider chelicerae. The chelicerae are shown in black, the surface of the cephalothorax in brown, the legs in reddish brown, and the venom glands and surrounding muscle tissue in green. The fang portion of the right chelicera can be seen projecting into the space between the two chelicerae.
Cephalothorax or prosoma: One of the two main body parts , located towards the anterior end, composed of the head (cephalic region or caput) and the thorax (thoracic region), the two regions being separated by the cervical groove; covered by the carapace and bearing the eyes, legs, pedipalps and mouthparts [3]
The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. [1] The terms prosoma and opisthosoma are equivalent to cephalothorax and abdomen in some groups.
As a result, a spider with a punctured cephalothorax cannot extend its legs, and the legs of dead spiders curl up. [13] Spiders can generate pressures up to eight times their resting level to extend their legs, [ 39 ] and jumping spiders can jump up to 50 times their own length by suddenly increasing the blood pressure in the third or fourth ...
Tagmata and major appendages of a spider: cephalothorax or prosoma and abdomen or opisthosoma The number of tagma and their names vary among taxa . For example, the extinct trilobites had three tagmata: the cephalon (meaning head), the thorax (literally meaning chest, but in this application referring to the mid-portion of the body), and the ...
Boundaries are constantly blurring in “Kiss of the Spider Woman,” the revolutionary mid-’80s film that became a Kander and Ebb musical, and that cunningly (and stunningly) morphs back to the ...
The cephalothorax and abdomen are not necessarily the same color. These spiders usually have markings on the dorsal side of their cephalothorax, with a black line coming from it that looks like a violin with the neck of the violin pointing to the rear of the spider, resulting in the nicknames fiddleback spider, brown fiddler, or violin spider. [2]