Spinybacked Orbweaver

Gasteracantha cancriformis

''Gasteracantha cancriformis'' is a species of orb-weaver spider. It is widely distributed in the New World.
Spiny_back_orb_spinner  Fall,Gasteracantha cancriformis,Gastercantha Cancriformis,Geotagged,United States

Appearance

Females are 5–9 millimetres long and 10–13 mm wide. The six abdominal spine-like projections on the abdomen are characteristic.

The carapace, legs and underside are black with white spots under the abdomen. Variations occur in the colour of the upperside of the abdomen: a white or yellow colour with both featuring black spots. A white upperside can have either red or black spines while a yellow upperside can only have black ones.

Like with many other spiders, males are much smaller and longer than wide. They are similar to the females in colour but have a gray abdomen with white spots and the spines are reduced to four or five stubby projections.
Gasteracantha cancriformis Spinybacked Orbweaver Gasteracantha cancriformis,Spinybacked Orbweaver

Distribution

''Gasteracantha cancriformis'' is native to North America, Central America, the Caribbean and South America. It has been introduced elsewhere, including Hawaii.
Spinybacked Orbweaver (Gasteracantha cancriformis) ♀ In an overgrown backyard habitat in NW Georgia (Gordon County), US. Gasteracantha cancriformis,Geotagged,Summer,United States

Reproduction

This species of spider does not live very long. In fact, the lifespan lasts only until reproduction, which usually takes place in the spring following the winter when they hatched. Females die after producing an egg mass, and males die six days after a complete cycle of sperm induction to the female.

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