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The anatomy of spiders includes many characteristics shared with other arachnids. These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps , simple eyes , and an exoskeleton , which is periodically shed .
Gasteracantha is a genus of orb-weaver spiders first named by Carl Jakob Sundevall in 1833. [2] Species of the genus are known as spiny-backed orb-weavers, spiny orb-weavers, or spiny spiders. The females of most species are brightly colored with six prominent spines on their broad, hardened, shell-like abdomens.
Spine: A pointed, rigid structure on body and legs, usually with a basal joint; [31] spiders have a variety of hair-like structures of increasing size that are referred to as hairs, bristles (setae) or spines [29]
Macracantha is a genus of Asian orb-weaver spiders recognized as containing the species, Macracantha arcuata. [2] [failed verification], although some schemes also recognise inclusion of Gasteracantha hasselti in this genus.
Gasteracantha cancriformis [2] (spinybacked orbweaver) is a species of orb-weaver spider (family Araneidae). It is widely distributed in the New World. [1]The genus name Gasteracantha derives from the Greek words γαστήρ (gaster, "belly") and ἄκανθα (acantha, "thorn"), while the specific epithet cancriformis derives from the Latin words cancer ("crab") and forma ("shape, form ...
The arachnoid mater is named after the Greek word arachne ("spider"), the suffix -oid ("in the image of"), and the Latin word mater ("mother"), because of the fine spider-web–like appearance of the delicate fibres of the arachnoid (arachnoid trabeculae) which extend down through the subarachnoid space and attach to the pia mater.
Spiny spider or spined spider is a common name for several species of spiders that exhibit spine-like projections on their body. It usually refers to: Austracantha minax, the Australian jewel spider or Christmas spider; Gasteracantha, the spiny orb-weavers; It may also refer to: Micrathena; Micrathena gracilis, the spined micrathena; Poecilopachys
Austracantha is a genus of spider with a single species, Austracantha minax, commonly known as the jewel spider or the Christmas spider. It is a member of the family Araneidae (the orb-weavers) and is endemic to Australia. They are relatively small spiders, reaching a maximum total body length of only around 12 mm (0.47 in) for females, and 5 ...