Photo: H. K. Tang, licensed under CC BY-NC-ND 2.0. These Ant mimic spiders only use their spider silk to wrap eggs in a pouch or to build a nest to rest on. Save my name, email, and website in this browser for the next time I comment. Twenty-six species are native to North America, [6] and at least twice as many are native to Mexico and Central America. The sac spiders of Canada and Alaska. Based on collected data, the geographic range for Castianeira includes 2 countries and 21 states in the United States. The Red Spotted-Ant Mimic Spider (Castianeira descripta) is found throughout North America. Overview of Spider Species in the United States. Wolf Spider Family (Lycosidae) . This . Required fields are marked *. Castianeira is a genus of ant-like corinnid sac spiders first described by Eugen von Keyserling in 1879. Very skittish. Castianeira crocata - Wikipedia Araneae: Clubionidae and Anyphaenidae, The spider subfamily Castianeirinae of North and Central America, Morsels For The Mind 11/09/2015 Six Incredible Things Before Breakfast, https://www.flickr.com/photos/dinrao/21405170553/. What is this orange backed spider? | Ask a Naturalist It is taken from the Catalogue of Texas Spiders by D. Allen Dean, which was started in 1940. Quick Facts Did You Know German arachnologist Eugen von Keyserling described this species for the first time in the year 1979. Learn how your comment data is processed. Not much detail prevails regarding their web, though they Select your preferred way to display the comments and click 'Save settings' to activate your changes. People with allergies should be more cautious.Photographed by: Jill Chaskey from Harrison, Michigan, The red-spotted ant mimic spider can be found throughout the United States and Canada. Hello Chris, thanks for getting in touch! They bite in a bid to defend themselves from danger, though Castianeira - Wikipedia Red spotted ant mimic spiders mimics the behavior of ants to get close enough to attack them. Its length is about 3/8. 4. The legs are completely translucent brown in juveniles. . Overview of Spider Species in the United States. The insects and arachnids of Canada. And thanks for sending in the great picture. There are a number of similar-looking species in that genus. The rear pair of legs are the longest, and the front pair are second longest. I killed it and crushed it beyond recognition so I cant send a photo in. Note: Castianeira variata which occurs in a similar range in the Eastern United States. They are black or blackish with a reddish stripe down the back. Found in Castle Pines Colorado in driveway, Hi Peggy, this is an ant mimicking spider of the genus Castianeira: https://usaspiders.com/castaniera-descripta-red-spotted-ant-mimic-spider/. Found this in my sink this morningwhat is it? Your email address will not be published. Live in Seward Alaska, ID please? (1997). They only bite if threatened and the venom they produce is not very deadly to humans. Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming. This appears to be another ant mimic spider, possibly in the genus Castianeira. Related Article: Hobo Spider vs Grass Spider 6. All rights reserved. Very fast, maybe 1 cm body length. Awer nnert de villen Arten, di Dir fannt, vlicht di, di Iech am meeschten unzezien, besonnesch fir Informatioun oder einfach fir Prventioun, sinn di gfteg Spann. Spiders of the Eastern United States --according to comments here, on page 263 of this reference, the image labeled as Castianeira amoena is actually C. gertschi or trilineata. Size: They have a It mimics the behavior of ants to get close enough to them for an attack. Castianeira longipalpa, not poisonous, found him inside :) Submitted by: squidasaurusrex German entomologist L. Koch first described this species in 1841. Females are only slightly larger than males. 2007. Don't subscribeAllReplies to my comments Notify me of replies to my comment via e-mail. They are not medically significant. But we would like to know if this one is very poisonous. I was bitten on the forehead by one of these. Seen (and photographed) in Boulder, Colorado, today, inside an enclosed patio. Found in north central Indiana under a porch. Is the Red Stripe Spider Venomous They only bite if threatened and the venom they produce is not very deadly to humans. Hi. I dont know of any velvet ants that look much like this (although many are bright orange), but I just cant get over how beautiful this spider is with its sunset-like stripes on the abdomen and a bluish iridescence on the carapace. It is found in the United States. Contributors own the copyright to and are solely responsible for contributed content.Click the contributor's name for licensing and usage information. Castianeiraoccidens from South Fork, Arizona. However, it is believed to be around 1-2 years. If the spider bites, it is not dangerous for humans. Males and juveniles are often much smaller with body sizes between 3 mm to 6 mm. This species is thought to be a generalized mimic of myrmecine or ponerine ants. These poisonous arachnids feed at night exclusively and rest during the day. If you need expert professional advice, contact your local extension office. Cushing P.E. Of the many species of spiders that resemble ants, these are some of the most common. Initially, the doctors at the Huidong County People's Hospital tried to check if the woman . Of the several spiders found here only one, i.e. Photo Credit is wrong on one of your pics. Castianeira crocata spiders have been sighted 10 times by contributing members. Finally, the spider below is not aCastianeira, but a species in the related genus Graptartia (also in the subfamily Castianeirinae). That will be the case in all spider species. Due to their size, they may even have difficulty even piercing through human skin. 3. Notify me of follow-up comments by email. The reason for this behavior is not entirely clear yet. Although the red-spotted ant spider is fairly aggressive, it generally targets small insects or ants rather than people or pets. second in terms of length is the pair in the front. Thank you for this article. The longest leg is one at the rear end, while the I found what I think is one of the black ones highlighted in this page. Castianeira spiders have been sighted 74 times by contributing members. The species shown above and below dont look especially like any particular species of ant, and their mimicry is imperfect besides having fairly elongate bodies and stripes that might give the illusion of a third body segment, they look a lot more like spiders than ants. What is it? Hello Eva, this is an ant mimicking spider (Castianeira sp. Found in my house, put it outside unharmed. This website is the only place I could find any information (other than the name) about this spider. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world.