noun (plural cephalothoraces /-ˈTHôrəˌsēz/ or cephalothoraxes)Zoology
The fused head and thorax of spiders and other chelicerate arthropods.
- The head and thorax are fused into a cephalothorax and may be difficult to distinguish.
- The body is divided into a front part - the cephalothorax or prosoma, and a rear part, the abdomen or opisthosoma.
- The cephalothorax of spiders is a sclerotized body part that does not change after the final molt.
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