abdomen the second segment of a spider's body anterior closer to the front of the body or to the cephalothorax anterior median eyes middle pair of eyes in the front of the carapace appendages the legs and pedipalps of a spider arachnologist scientist who studies arachnids Araneae the Order to which spiders belong arthropod animals with external skeletons and jointed legs; includes insects, spiders, and crabs biodiversity number and kinds of living organisms book lungs one type of respiratory organ found in spiders boss a bump found at the base of the chelicerae of some spiders calamistrum bristles on metatarsus IV of some spiders used to comb silk from the cribellum carapace first segment of spider's body cephalothorax first segment of spider's body chelicerae jaws of a spider cobweb spider spider in the family Theridiidae combfooted spider spider in the family Theridiidae coxa leg segment closest to the body crab spider spider in the family Thomisidae cribellum a flat spinning plate covered with thousands of silk spigots anterior to the spinnerets in cribellate spiders cribellate a group of spiders possessing a cribellum and calamistrum daddy-long-legs spiders spiders in the family Pholcidae dorsal on top dragline a safety line of silk ecosystem a community of species that lives in a particular habitat Ecribellate group of spiders lacking a cribellum and calamistrum endites platelike structures on either side of the opening to the mouth used to macerate prey and filter out large particles from the mouth epigynum scleritized plates surrounding the genital opening on the ventral surface of the female's abdomen fang claw-like structures at the ends of the chelicerae with openings leading to poison glands femur the third segment of the leg or pedipalp fishing spider spider in the family Pisauridae funnel weavers spiders in the family Agelenidae genitalia pedipalps and epigyna, or external sexual organs in spiders hairy mygalomorph spider in the family Theraphosidae intromittent organs male organs used to inject sperm into females; pedipalps are intromittent organs jumping spider spider in the family Salticidae labium a platelike structure located between the two endites lampshade spider spider in the family Hypochilidae lateral side long jawed spider spider in the family Tetragnathidae lynx spider spider in the family Oxyopidae median middle metatarsus sixth leg segment away from the body morphology the study of body form and structure nursery web spider spider in the family Pisauridae orb-weaving spider spider in the family Araneidae patella the fourth segment of the leg or pedipalp counting from the tip of the appendage pedicel the stalk linking the cephalothorax to the abdomen pedipalps the leg-like first pair of appendages on a spider pirate spider spider in the family Mimetidae posterior closer to the spinnerets posterior median eyes middle pair of eyes closer to the back of the carapace sac spiders spiders in the family Clubionidae scleritized hardened and thickened scopula a fringe of fine hairs on the ventral surface of the tarsus and metatarsus sheet-web weaver spider in the family Linyphiidae sperm web a platform of silk upon which the male deposits a droplet of sperm spiderlings baby spiders spinnerets organs through which silk emerges from a spider's body spiracle opening to the respiratory organs (the book lungs or the tracheae) sternum hardened plate forming the ventral surface of the cephalothorax stridulating area area with parallel chitinous ridges that are rubbed by another structure to produce sounds tarantula mygalomorph spider tarsus last segment of the leg or pedipalp taxonomy the science of classification; in biology the taxonomic categories from greatest to smallest are Kingdom, Phylum, Class, Order, Family, Genus, Species tibia the third segment of the leg counting from the end tracheal spiracle opening to the tube-like respiratory organs called tracheae that extend inside the spider's body trapdoor spider spider in the family Ctenizidae trochanter the second segment of the leg or pedipalp counting from the body truncate squared off ventral ''belly'' side wolf spider in the family Lycosidae Back to top