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  2. Cephalothorax - Wikipedia

    en.wikipedia.org/wiki/Cephalothorax

    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.

  3. Thorax (arthropod anatomy) - Wikipedia

    en.wikipedia.org/wiki/Thorax_(arthropod_anatomy)

    It is also called mesosoma or cephalothorax in other arthropods. It is formed by the prothorax, mesothorax and metathorax and comprises the scutellum; the cervix, a membrane that separates the head from the thorax; and the pleuron, a lateral sclerite of the thorax.

  4. Spider anatomy - Wikipedia

    en.wikipedia.org/wiki/Spider_anatomy

    The cephalothorax, also called prosoma, is composed of two primary surfaces: a dorsal carapace and a ventral sternum.Most external appendages on the spider are attached to the cephalothorax, including the eyes, chelicerae and other mouthparts, pedipalps and legs.

  5. Glossary of spider terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_spider_terms

    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]

  6. Arachnid - Wikipedia

    en.wikipedia.org/wiki/Arachnid

    The cephalothorax is usually covered by a single, unsegmented carapace. The abdomen is segmented in the more primitive forms, but varying degrees of fusion between the segments occur in many groups. It is typically divided into a preabdomen and postabdomen, although this is only clearly visible in scorpions, and in some orders, such as the ...

  7. Decapod anatomy - Wikipedia

    en.wikipedia.org/wiki/Decapod_anatomy

    The decapod (crustaceans such as a crab, lobster, shrimp or prawn) is made up of 20 body segments grouped into two main body parts: the cephalothorax and the pleon . [1] [2] Each segment may possess one pair of appendages, although in various groups these may be reduced or missing. They are, from head to tail:

  8. Tagma (biology) - Wikipedia

    en.wikipedia.org/wiki/Tagma_(biology)

    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 ...

  9. Cephalon (arthropod head) - Wikipedia

    en.wikipedia.org/wiki/Cephalon_(arthropod_head)

    In chelicerates and crustaceans, the cephalothorax is derived from the fusion of the cephalon and the thorax, and is usually covered by a single unsegmented carapace.In relation with the arthropod head problem, phylogeny studies show that members of the Malacostraca class of crustaceans have five segments in the cephalon, when not fused with the thorax to form a cephalothorax.