Sharp prickles around the squat abdomen of the Spinybacked Orbweaver spider keep predators at bay.
The spines on the side of the female spider make the Spinybacked Orbweaver unique and easy to recognize. Males are considerably smaller than females and they lack the pointy spines. There are a variety of species in this genus and abdomen colors vary from red, orange and yellow to white and ivory. Spines are black or red. All have wide abdomens that give the body a crab-like resemblance. This kind of spider is sometimes called a Crablike Spiny Orbweaver.
Like other orb weavers, it creates a web that is circular in shape with only a few spirals at the center of its web. Each night, a new web is spun to catch small insect prey. The spider sits up-side-down on the web. Late in the year, the female lays eggs that will grow throughout winter, hatching spiderlings in the spring. The oval-shaped egg sac is near the web, usually hidden underneath leaves. It may be white, green, or yellowish, but it is woven of the spider's silk.
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.
Legs: Spiders have four pairs of legs and these are attached to the cephalothorax.
Pedipalps: Small appendages near the mouth used as taste and smell organs.
Cephalothorax: Contains eyes, head, mouthparts, and legs.
Abdomen: Contains various organs related to digestion, reproduction, and web-making.
Spinnerets: Used in the production of spider silk for fashioning webs or catching prey.
NOTE: Unlike insects, spiders have both an endoskeleton (internal) and exoskeleton (external).