Spinybacked orbweaver spider. - a photo on Flickriver

            Gasteracantha cancriformis (spinybacked orbweaver) is a species of orb-weaver spider (family Araneidae). It is widely distributed in the New World.

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, appearance"). 

Females are 5–9 mm (0.20–0.35 in) long and 10–13 mm (0.39–0.51 in) 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 upper side 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 (2 to 3 mm long) and longer than wide. All morphs have six abdominal spines. 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.

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. 

Los Angeles. California.

Taken on: November 4, 2018

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Camera: Canon EOS 60D, f/7.1, 1/400 sec, 200mm, ISO 100 (more info) (hide info)

Camera:	Canon EOS 60D
Aperture:	f/7.1
Exposure Time:	0.003 sec (1/400)
Focal Length:	200mm
ISO:	100
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Program AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	PaintShop Pro 19.00
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