Like with many other spiders, males are much small… attack is non-poisonous, causing no serious harm to mankind. Though their abdomen resembles a crab shell because of the spikes present in the abdomen, one should not confuse them with. Spiny Orb-Weaver Identification Easily distinguished from the other species of orb-weaver spiders, the spiny-back species is identified by its colorful body. Legs: Their legs and c… In fact, the lifespan lasts only until reproduction, which usually takes place in the spring following the winter when they hatched. Although not as large as some of the other orb weavers, its combined color, shape, and distinctive web makes G. cancriformis a very recognizable spider. Spiny-backed Orbweavers are relatively diminutive arachnids with a body and carapace length of just under one-half (1/2) of an inch. The six abdominal spine-like projections on the abdomen are characteristic. The orb weaver spider group is comprised of a large number of species thus making it difficult to distinguish them from other spider groups and from each other. Gasteracantha cancriformis spiders have been sighted 57 times by contributing members. shrubby gardens, as well as nurseries, and citrus groves. 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 die after producing an egg mass, and males die six days after a complete cycle of sperm induction to the female. Spiny Orb-weaver, Thorn-belly Orb-weaver, Jewel Box Spider, Crab-like Orb-weaver. This species of spider does not live very long. Based on collected data, the geographic range for Gasteracantha cancriformis includes 7 countries and 9 states in the United States. However, their has about 100 to 260 eggs which hatch in 11 to 13 days. The spider species Gasteracantha cancriformis, commonly known as Spiny-backed Orb-weaver, belongs to the genus Gasteracantha, in the family Araneidae. Spine: The spineybacked orb weaver spider, also known as the crab-like orbweaver and the spiny orbweaver, get their common name from the spines that protrude from their abdomen and their body shape that generally looks like that of a crab. Variations occur in the colour of the upperside of the abdomen: a white or yellow colour with both featuring black spots. As with all other members of … Females are 5–9 millimetres (0.20–0.35 in) long and 10–13 mm (0.39–0.51 in) wide. The spiny projections as mentioned below are red or orange, while that of the males are of a darker shade. Like with many other spiders, males are much smaller (2 to 3 mm long) and longer than wide. spiders are not aggressive and will bite only if provoked. Gasteracantha cancriformis has also been sighted in the following states: Alabama, Florida, Georgia, Hawaii, North Carolina, South Carolina, Tennessee, Texas, Virginia. Gasteracantha cancriformis spiders have been sighted 57 times by contributing members. Spiny Orb Weaver Spider The spider species Gasteracantha cancriformis, commonly known as Spiny-backed Orb-weaver, belongs to the genus Gasteracantha, in the family Araneidae. The egg sac They still have some “lumpy” protrusions, though. Gasteracantha cancriformis (Spiny-backed Orb-weaver) has been sighted in the following countries: Bermuda, Brazil, Colombia, Honduras, Mexico, Panama, United States. Parts of Asia (Indonesia, Malaysia, Thailand, Philippines, China, India, Sri Lanka); Africa, Australia and United States, Woodlands, These Near Houston, Media related to Gasteracantha cancriformis at Wikimedia Commons, Learn how and when to remove this template message, https://en.wikipedia.org/w/index.php?title=Gasteracantha_cancriformis&oldid=980268531, Articles needing additional references from May 2019, All articles needing additional references, Articles lacking in-text citations from April 2016, Creative Commons Attribution-ShareAlike License, Eberhard, William G. (2006): Stabilimenta of, This page was last edited on 25 September 2020, at 15:00. Gasteracantha cancriformis is native to North America, Central America, the Caribbean and South America. Their abdomen is white and contains black spots with large red spines extending from the edge of the abdomen. The spiny orb weaving spider has six pointy �spines� protruding from along its side. Color: They are bright in color, having a yellow, white or orange abdomen with markings of red. The detailed statistics below may not utilize the complete dataset of 57 sightings because of certain Gasteracantha cancriformis sightings reporting incomplete data. 1. Gasteracantha cancriformis[2] (Spinybacked orbweaver) is a species of orb-weaver spider (family Araneidae). Gasteracantha cancriformis has been primarily sighted during the month of May. Variations occur in the colour of the upperside of the abdomen: a white or yellow colour with both featuring black spots. prey. Males are much smaller, ranging from 2 to 3 millimeters in length, and slight longer in width. A white upperside can have either red or black spines while a yellow upperside can only have black ones. Size: The females have a length and width of 5-9 mm and 10-13mm respectively. In fact, the Orb-weaver spider family, Araneidae, is one of the most variable in size and appearance of all spider families. For scale, band in background is 6 mm wide. sheet they are protected with a white or yellow spongy, tangled, loose mass. When laid on a silken It has been introduced elsewhere, including Hawaii. FIGURE 2. Other Characteristic Features: They have six spiny projections protruding at the backside of the abdomen. BEHAVIOR: The spiny-backed orb weaver spins flat, orb-shaped webs in shrubs, trees and in the corners of windows, soffits and similar outdoor areas of buildings. 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. They are known Color: They are a very colorful, easily recognized spider. Adult males are smaller than the females and do not have prominent spines like the females do. All rights reserved. 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 spiny-orb weaver belongs to the genus of orb-weaving spiders and has received its name because of the spiny texture visible on the abdomen. 2. They are not dangerous and would easily be overlooked if not for their unique coloration. 3. Adult females range from 5 to 9 millimeters in length, and 10 to 13 millimeters in width. © 2020 (Spider Identifications). Besides different parts of Asia, species of this genus is also seen in the continents of America, Africa, and Australia. The carapace, legs and underside are black with white spots under the abdomen. The orb web may have tufts of silk sporadically placed on the threads. The large spiny projections are mainly present in the female spiders of this genus, while for the males they look like small humps, being five to six in number. However, the most observable appearance of orb weavers isn't necessarily their appearance, but the appearance of the large webs they create. Your email address will not be published. The shape and length of the spines of the spider may have geographic variations. A white upperside can have either red or black spines while a yellow upperside can only have black ones. Swedish zoologist, Carl Jakob Sundevall was the first to have described this species in the year 1833. Gasteracantha cancriformis is most often sighted outdoors, and during the month of May. Females are 5–9 millimetres (0.20–0.35 in) long and 10–13 mm (0.39–0.51 in) wide. Image Credits: I.redd.it, Upload.wikimedia.org, Barbaracasey.com, Your email address will not be published. Besides different parts of Asia, species of this genus is also seen in the continents of America, Africa, and Australia. 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. Spiny Orb-Weaver (Gasteracantha) The spiny-orb weaver belongs to the genus of orb-weaving spiders and has received its name because of the spiny texture visible on the abdomen. Required fields are marked *. These spiders capture flying, and sometimes crawling, insects found around a home. The six abdominal spine-like projections on the abdomen are characteristic. It is widely distributed in the New World.[1]. to build large-sized circular webs like most other orb-weavers for capturing The carapace, legs and underside are black with white spots under the abdomen. The males are smaller in size, being 2-3mm in length and a little more in terms of width. Reproduction in whole or in part without permission is prohibited. They remain in the silken case between two and five weeks and become dark in color on acquiring maturity. One of the bright-hued spiders is the spiny orb weaver, Gasteracantha cancriformis. [1], In Novo Hamburgo (southern Brazilian population), with focus on the web, Underside of orange specimen, showing spinner and thread.
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