- Kingdom: Animalia
- Phylum: Arthropoda
- Class: Arachnida
- Order: Araneae
- Suborder: Araneomorphae
- Family: Araneidae
- Genus: Gasteracantha
- Species: Gasteracantha cancriformis
Common Name (AAS)
Other Common Names
Spiny Orb-weaver, Thorn-belly Orb-weaver, Jewel Box Spider, Crab-like Orb-weaver
Carl Linnaeus, 1758
There have been 57 confirmed sightings of Gasteracantha cancriformis (Spiny-backed Orb-weaver), with the most recent sighting submitted on July 31, 2019 by Spider ID member tangledweb. The detailed statistics below may not utilize the complete dataset of 57 sightings because of certain Gasteracantha cancriformis sightings reporting incomplete data.
- Web: 88% of the time, Gasteracantha cancriformis spiders are sighted in a spider web (Sample size: 48)
- Sex: 14 female and 1 male.
- Environment: Gasteracantha cancriformis has been sighted 51 times outdoors, and 3 times indoors.
- Outdoors: Man-made structure (18). Low foliage (17). High foliage (13). Freshwater river, lake, stream (1). Open field, pasture, grassland (1). Forest (1).
Location and Range
Gasteracantha cancriformis (Spiny-backed Orb-weaver) has been sighted in the following countries: Bermuda, Brazil, Colombia, Honduras, Mexico, Panama, United States.
Gasteracantha cancriformis has also been sighted in the following states: Alabama, Florida, Georgia, Hawaii, North Carolina, South Carolina, Tennessee, Texas, Virginia.
Gasteracantha cancriformis has been primarily sighted during the month of May.
- January: 7
- February: 4
- March: 10
- April: 4
- May: 11
- June: 3
- July: 6
- August: 3
- September: 1
- October: 4
- November: 1
- December: 3
- The egg sac of this species is a flattened mass of tangled bright yellowish-green silk, often with a thin, vertical stripe of dark green silk on top.
- Adult males are smaller than the females and do not have prominent spines like the females do. They still have some “lumpy” protrusions, though.
- The shape and length of the spines of the spider may have geographic variations.
- The orb web may have tufts of silk sporadically placed on the threads.