Gasteracantha cancriformis
(Spiny-backed Orb-weaver)

Featured spider picture The spider species Gasteracantha cancriformis, commonly known as Spiny-backed Orb-weaver, belongs to the genus Gasteracantha, in the family Araneidae. Gasteracantha cancriformis spiders have been sighted 14 times by contributing members. Based on collected data, the geographic range for Gasteracantha cancriformis includes 5 countries and 4 states in the United States. Gasteracantha cancriformis is most often sighted outdoors, and during the month of January.

Taxonomic Hierarchy

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Arachnida
  • Order: Araneae
  • Suborder: Araneomorphae
  • Family: Araneidae
  • Genus: Gasteracantha
  • Species: Gasteracantha cancriformis

Common Name (AASMore information icon)

Spiny-backed Orb-weaver

Other Common Names

Spiny Orb-weaver, Thorn-belly Orb-weaver, Jewel Box Spider, Crab-like Orb-weaver

Author

Carl Linnaeus, 1758

Primary Colors


Sightings Overview

There have been 14 confirmed sightings of Gasteracantha cancriformis (Spiny-backed Orb-weaver), with the most recent sighting submitted on February 16, 2018 by Spider ID member kjerstan. The detailed statistics below may not utilize the complete dataset of 14 sightings because of certain Gasteracantha cancriformis sightings reporting incomplete data.

  • Web: 75% of the time, Gasteracantha cancriformis spiders are sighted in a spider web (Sample size: 4)
  • Sex: 11 female and 1 male.
  • Environment: Gasteracantha cancriformis has been sighted 5 times outdoors, and 0 times indoors.
  • Outdoors: Man-made structure (2). Low foliage (3).

Location and Range

Gasteracantha cancriformis (Spiny-backed Orb-weaver) has been sighted in the following countries: Bermuda, Honduras, India, Mexico, United States.

Gasteracantha cancriformis has also been sighted in the following states: Florida, Hawaii, North Carolina, Texas.

Seasonality

Gasteracantha cancriformis has been primarily sighted during the month of January.

  • January: 4
  • February: 1
  • March: 1
  • April:
  • May: 1
  • June: 2
  • July: 3
  • August: 1
  • September:
  • October:
  • November: 1
  • December:

Additional Remarks

  • 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.

Featured Pictures

Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal Enlarge Picture
  • Check iconFamily Check iconGenus Check iconSpecies
  • Submitted Calendar iconFeb 16, 2018
  • Photographed Picture iconFeb 16, 2018
  • Kjerstan
  • Sex icon
    Female
  • Location iconutila, islas de la bahia, Honduras
  • Comment icon2 Comments
1
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal Enlarge Picture
  • Check iconFamily Check iconGenus Check iconSpecies
  • Submitted Calendar iconJan 20, 2018
  • Photographed Picture iconJan 20, 2018
  • Rosie
  • Sex icon
    Female
  • Location iconMazatlan, Mexico
  • Comment icon2 Comments
2
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal,Webs Enlarge Picture
3
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Dorsal Enlarge Picture
4
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal,Webs Enlarge Picture
5
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Ventral Enlarge Picture
  • Check iconFamily Check iconGenus Check iconSpecies
  • Submitted Calendar iconJun 29, 2016
  • Photographed Picture iconJun 24, 2015
  • Copyright icon JimRawrz
  • SpiderID
    spiderid (Submitted by)
  • Sex icon
    Female
  • Location iconUnknown
  • Comment icon0 Comments
6
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal Enlarge Picture
  • Check iconFamily Check iconGenus Check iconSpecies
  • Submitted Calendar iconJun 29, 2016
  • Photographed Picture iconJun 26, 2008
  • Copyright icon Karunakar Rayker
  • SpiderID
    spiderid (Submitted by)
  • Sex icon
    Female
  • Location iconKalasa, Karnataka, India
  • Comment icon0 Comments
7
Picture of Gasteracantha cancriformis (Spiny-backed Orb-weaver) - Female - Dorsal Enlarge Picture
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