Found this walking across my kitchen floor in California. Castianeira amoena. I didnt notice the red mark on its back until it was out in the sun. You can upload: image. They bite in a bid to defend themselves from danger, though I looked through all kinds of websites to see if I can find this spider and I could not find not one picture of it. Despite its name, the long-palped ant mimic sac spider does not look much like an ant. One belief is that it does so to mimic certain ants in hopes of getting close enough to one to pounce on. These spiders are supposed to be active during the day, so it was interesting to find this one running aroundin the dark while we were out with our headlamps searching for wolf spiders. Spiders in the genus Castianeira have 8 eyes in 2 rows. [1] Description C. variata is also not medically significant, so an exact species level ID might not be necessary for the purpose of reader safety.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'usaspiders_com-medrectangle-4','ezslot_8',106,'0','0'])};__ez_fad_position('div-gpt-ad-usaspiders_com-medrectangle-4-0'); Despite the much larger appearance on the images here, C. longipalpa are relatively small spiders. so all the photographs in this post are real treasures. The abdomen of the spider is always black with at least four lateral white or light gray stripes. make silken sacs adjacent to their resting places. I live in Central Oregon. Dondale, C. D., & Redner, J. H. (1982). No, they are not particularly rare, but it is a bit unusual to find one inside! Comments & ID Thoughts. Don't subscribeAllReplies to my comments Notify me of replies to my comment via e-mail. Genus: Castianeira Species: Castianeira descripta Distribution of the Red-Spotted Ant Mimic Spider in the USA The red-spotted ant mimic spider can be found throughout the United States and Canada. . and the photographer then managed to move them so that he could capture them together in thephoto below. It mimics the behavior of ants to get close enough to them for an attack. Red spot ant mimic spiders are sighted under a rock, shrubs, woods, and parks. They are not medically significant. Pingback: Spiderday (#14) | Arthropod Ecology, Pingback: Morsels For The Mind 11/09/2015 Six Incredible Things Before Breakfast, I just took a photo of a Mexican Castianeira that you might find interesting. Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. The sac spiders of Canada and Alaska. curved manner in rows of two. Usually these spiders are pretty recognizable because of their distinctive colouration, but some of the less bold onescan be confused with other ant-like spiders (like Micaria). Mine has tiny greenish barbs sticking up off the abdomen. These spiders also have a white, scaly appearance on their abdomen like ants. Not happy with the results from the from the tool so here you go. If you would like to support us, we appreciate donations through Paypal here. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. It was found in Midlothian, Virginia. The photo below shows the relative size of Castianeira amoena on a human hand. Your email address will not be published. However, their first instinct when approached by much larger humans or pets, their first instinct is generally to flee. 1724). They are not all antmimics, but manyspecies in the genus Castianeiraare rather ant-like and are consideredgeneralized ant-mimics. Castianeira crocata has been primarily sighted during the month of May. Corpus Christi, Nueces County, Texas, USA. The bite will cause swelling, comparable to a bee sting . C. longipalpa is a fast spider and may seem somewhat aggressive due to its speed. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. They are considered harmless, though their bites might cause an allergic reaction in some humans. Reiskind, J. Even more dramatic is what I like to call the tiger-stripedCastianeirabelow. Photo: Sean McCann. That will be the case in all spider species. [5] They are found in Eurasia, Africa, and the Americas, but are absent from Australia. we appreciate donations through Paypal here. Required fields are marked *. These spiders areoften found in close proximity to ants, which provides some support for the idea that they are in fact mimics. The reason for this behavior is not entirely clear yet. As a hunter spider, the red-spotted ant mimic spider does not build a web to catch its prey. Castianeira spiders are often sighted on the web and use the web to trap or hunt their prey. People with allergies should be more careful. Color: They are black, with a single red stripe running down their abdomen. Castianeira descripta, better known as the red-spotted ant-mimic Spider, gets its common name from its ant-like appearance and behavior. Castianeira longipalpa, not poisonous, found him inside :) Submitted by: squidasaurusrex I imagine they would be as fearsome or even more so than a tiger if they were blown up to a comparable size. We are always happy to receive more if you find some spiders in your area. The bite will cause swelling, comparable to a bee sting. Mus. ): https://usaspiders.com/?s=castianeiraTo determine the species, I would need to know the location where it was found. The picture is the underside of the spider. Hello Eric, this is an ant mimicking spider of the genus Castianeira: https://usaspiders.com/castianeira-longipalpa-long-palped-ant-mimic-sac-spider/, Your email address will not be published. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'usaspiders_com-box-4','ezslot_9',107,'0','0'])};__ez_fad_position('div-gpt-ad-usaspiders_com-box-4-0');As other spiders of the Corinnidae family, the long-palped ant mimic spider is a hunter spider. The following ID tips come from Reiskind, 1969. The cephalothorax (head area) can be black, brown or grayish, almost white. Other Characteristic Features: They are similar in appearance to true black widow spiders. Bull. Castianeira longipalpa spiders have been sighted 20 times by contributing members. Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. 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. Is the Castianeira amoena Spider Venomous. They aregenerally mutillid-like intheir movements and in that they have bright markings on their abdomensreminiscent of the warning colouration (aposematism) of velvet ants, like the one below. red-spotted ant mimic spider (C. descripta), Enoplognatha Ovata Candy-Striped Spider, https://bugguide.net/node/view/1344064/bgimage, https://usaspiders.com/castianeira-longipalpa-long-palped-ant-mimic-sac-spider/. One was in a pile of newspapers, and another one started walking across the floor. In this case, harmless Castianeira spiders might benefit by looking like the much more dangerous velvet ants, and thus be avoided by predators (this is called Batesian mimicry ). These long-legged arachnids have a distinct appearance, with their thin bodies and spindly legs. References: Evans, A.V. This . Though its body shape is quite different, its characteristic black body and red-marked back puts it at risk of being mistaken for a black widow spider. The male are smaller than the female spiders.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'usaspiders_com-medrectangle-4','ezslot_13',106,'0','0'])};__ez_fad_position('div-gpt-ad-usaspiders_com-medrectangle-4-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'usaspiders_com-medrectangle-4','ezslot_14',106,'0','1'])};__ez_fad_position('div-gpt-ad-usaspiders_com-medrectangle-4-0_1');.medrectangle-4-multi-106{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. Thanks so much for sharing ::::). second in terms of length is the pair in the front. While their bite is known to sting, it isn't deadly to humans. Wow! Front legs mostly a silvery gray, forward facing. Based on collected data, the geographic range for Castianeira crocata includes 1 countries and 3 states in the United States. It is believed that this behavior should help them get close to ants in order to prey on them. Both rows are slightly procurved (curved toward the frontend of the spider). Archoleptonetidae [ edit] Darkoneta garza Atypidae [ edit] Sphodros paisano Sphodros rufipes Size: They have a Internet References ~ digitallibrary.amnh.org - New American Spiders of the Clubionidae, Gertsch 1942. Photo: sankax, licensed under CC BY-NC 2.0. The males are smaller than the female spiders. Copyright 2022 USASpiders. There are 26 species found in the USA & Canada. 14. Hello Melody, thanks for getting in touch.This is definitely an ant-mimicking spider (Castianeira sp. These small spidersare ratherelusive, but sobeautiful! Lifespan: 1-3 years: Distribution: The United States and Mexico: Habitat: Woods: Diet: Small insects like ants: Did You Know. If you're wondering about castianeira crocata, are spiders venomous? False statements included: that the spiders were brought to North America from Australia by drug cartels; that female Castianeira castrate their mates; that it was a Castianeira that bit Peter Parker in the Spider-Man . Castianeira descripta, more commonly know as the red-spotted ant mimic spider gets its common name from the similar look and behavior to ants. okay so i have found a spider like this in my shed, only it has small white lines on either side of the red fat line so does that sound like the same one? Reproduction in whole or in part without permission is prohibited. German entomologist L. Koch first described this species in 1841. In adults, the two front leg pairs are usually brown towards the end and black at the beginning close to the body. Picture 2. Castianeira cingulata portrait, showing the eye arrangement. Hi, I live in MN and have found several of these spiders inside. The red-spotted ant mimic spider does not build a web to capture its prey as a hunting spider. Fortunately, black widows (Southern Black . Hello Chris, thanks for getting in touch! Is this type of spider dangerous at all by any chance. You can compare information of this spider to learn more about it: https://usaspiders.com/castaniera-descripta-red-spotted-ant-mimic-spider/. German arachnologist Eugen von Keyserling described this species for the first time in the year 1979. Less than an inch in size.Maryland, Hello Kam, this is an ant mimicking spider (Castianeira sp.). A normal female red-spotted ant mimic grows about 13mm. The Castianeira belongs to the family of corinnid sac spiders, indigenous to the Americas, Eurasia, and Africa, comprising 127 species according to the April 2019 records. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); All identification and information on USAspiders.com are free - of course. In addition to the ant-like coloration, the abdomen has white scale-like setae. Photo: Paul Bertner (used with permission). Due to their size, they may even have difficulty even piercing through human skin. In this case, harmless Castianeiraspiders might benefit by looking like the much more dangerous velvet ants, and thus be avoided by predators(this is calledBatesian mimicry). Drop file here. Photo: Sean McCann. Hello Sandy, this is some type of ant-mimicking spider of the genus Castianeira. The top of the spider has a few white stripes on its body in the back, almost like a zebra spider does. Castianeira is a genus of ant-like corinnid sac spiders first described by Eugen von Keyserling in 1879. Eggs hatch in autumn and spiderlings overwinter until spring. Almost pincer-looking, or stout like a bulldogs jowls. The Red Spotted-Ant Mimic Spider (Castianeira descripta) is found throughout North America. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. 2023 (Spider Identifications). Therefore, there is no guarantee that all images on this overview actually reflect C. longipalpa. The Castianeira Descripta specimencan be easily confused with some black widow species as it is a hairless black spider with red markings on its back. Hi Jason, this is most likely some type of ant mimicking spider of the genus Castianeira. The red-spotted ant-mimicking Spider is a hunter Spider. I just caught this spider in my bathroom after it scared the crap out of my daughter. Legs seem about the same length, rear ones a little long maybe. Required fields are marked *, Attachment red or brown, similar to the color of ants.They also have a white, scaly appearance on their abdomen. Mutillids are not actually ants but wasps, and the females are wingless and brightly coloured, with extremely painful stings. I killed it and crushed it beyond recognition so I cant send a photo in. This ones in my kitchen and smaller than a pinky nail. AntmimicsandGroundSacSpiders(Corinnidae), crocata/descripta(Castianeiracrocata/descripta). Exact identification can be impossible without examining the spider under a microscope. Castianeira is most often sighted indoors, and during the month of May. Genus: Castianeira View More Species: descripta Identifying Information Size, Colors, Features Scientific Name: Castianeira descripta Category: Spider Size (Adult; Length): 5mm to 10mm (0.19" to 0.39") Colors: black; red; white Descriptors: hairy; biting; venomous Advertisements Relative Size Comparison we appreciate donations through Paypal here. References. Seen (and photographed) in Boulder, Colorado, today, inside an enclosed patio. There are currently 128 known speciesin the genus, so I will only be able to highlight a small number in this post. 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. the black widow is deemed as poisonous. Gertsch 1942 C. arizonica name in doubt probably was something else. The maximum upload file size: 15 MB. This jumping spider is one of the few found outside tropical regions, and there are many varieties. https://usaspiders.com/castaniera-descripta-red-spotted-ant-mimic-spider/, https://usaspiders.com/pisaurina-mira-nursery-web-spider/. This is a red-spotted ant mimic spider, Castianeira descripta: https://usaspiders.com/castaniera-descripta-red-spotted-ant-mimic-spider/Its not a medically significant spider. Reproduction in whole or in part without permission is prohibited. Hello Eva, this is an ant mimicking spider (Castianeira sp. Like all sac spiders, it is venomous, but its venom is not fatal to humans and will likely only cause localized pain. Some species, like the onefrom Singapore below, are a little more ant-shaped, but their morphology isnot as extremely modified as someother kinds of ant-mimicking spiders (like this onephotographed by Alex Wild). Hi Libby, this is a hacklemesh weaver (family Amaurobiidae). 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. The insects and arachnids of Canada. Sure thing! I went thru your rigamarole, which was very thorough indeed, but cant figure it out. Live in Seward Alaska, ID please? Fun fact : These spiders are very fast and not often captured either literally or. In reality however, these spiders are extremely shy, and very fast runners when they are disturbed (as by humans!) Though the differences are easily noticeable to those who are familiar to them, if you are not sure, it is best to be safe rather than sorry and not handle the spider. What is it? However, it is more commonly seen on the East Coast. Contributors own the copyright to and are solely responsible for contributed content.Click the contributor's name for licensing and usage information. The red-spotted ant mimic Spider often walks with both front legs raised when it moves. The sac spiders of Canada and Alaska. Around 6mm in length, they resemble wood ants. Twenty-six species are native to North America,[6] and at least twice as many are native to Mexico and Central America. I found what I think is one of the black ones highlighted in this page. Cushing P.E. Finally, the spider below is not aCastianeira, but a species in the related genus Graptartia (also in the subfamily Castianeirinae). I took a picture but he was hiding under a piece of grass. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'usaspiders_com-banner-1','ezslot_10',108,'0','0'])};__ez_fad_position('div-gpt-ad-usaspiders_com-banner-1-0'); The long-palped ant mimic spider is found throughout the Eastern United States, east of the Rocky Mountains. Uniform leg color (dark), small fine hairs. Cathy Honeycutt, 16 May, 2015 - 10:48pm : login or register to post comments Common names for the family Corinnidae include groundsac spiders (they used to be included in the sac spider family Clubionidae) and antmimic spiders. Your email address will not be published. Quick Facts Did You Know German arachnologist Eugen von Keyserling described this species for the first time in the year 1979. Velvet ant from French Guiana. French arachnologist Nicholas Marcellus Hentz first described this species in 1847. https://www.flickr.com/photos/dinrao/21405170553/, What a beautiful spider! The eggs remain in a silken sac, which is white and These spiders build webs close to their resting places. [8], Some species mimic specific groups of ants, while others only have generic body modifications to look more ant-like, such as an elongated body or a carapace pattern that creates the illusion of a third body segment. Castianeira crocata has been sighted in the following countries: United States. Hi Raven, this is an ant mimicking spider of the genus Castianeira. It resembles the image of C. dorsata in BugGuide.net. Obviously, looking like a velvet ant isnt going to fool anyone if its so dark they cant see how brightlycoloured you are. As with the ant-like species, these spiders tend not to look very much like any particular species of velvet ant. [5] They are found in Eurasia, Africa, and the Americas, but are absent from Australia. Spiders by US State Spider Gallery Submit Your Spider for Identification Spider Information Privacy Policy Cookie Policy About Contact. Part 9. Don't subscribeAllReplies to my comments Notify me of replies to my comment via e-mail. There have been 74 confirmed sightings of Castianeira, with the most recent sighting submitted on December 31, 2019 by Spider ID member downoninit. Very cool website, I just scrolled down the list for Texas until I saw a spider that looked similar, and now I know all about what I saw. I believe the spiders I have seen have been about the size of a nickel, but I am not completely sure of the size as I try to stay far away from them!

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