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| | Jeremy Miller |
 | | The lack of modern taxonomic treatment of the genus Latrodectus hampers all aspects of biological research, including ecology, toxicology, and changes in species distribution. | | | Knowledge of both the sexual behavior and venom characteristics of Latrodectus species is uneven and rarely comparative, so much of our effort will be focused on observing multiple species both in the lab and in the field. | | | Once this is accomplished, we will be able to discuss the evolution of Latrodectus venom and sexual behavior with reference to a robust phylogeny. |
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http://www.calacademy.org/research/entomology/personnel/jmiller
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| | Re: Why does the black widow eat her mate? |
| | Ross, K., R.L. Smith: Aspects of the courtship behavior of the black widow spider Latrodectus hesperus (Araneae: Theridiidae), with evidence for the existance of a contact pheromone. | | | I'm not certain how this myth started, but the behavioral data on the subject simply don't support it--in fact, the data contradict this idea. | | | More information on this subject can be found in the following sources: |
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http://www.madsci.org/posts/archives/dec96/845835098.Gb.r.html
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| | Redback Spiders |
| | Forster, L. The behavioural ecology of Latrodectus hasselti (Thorell), the Australian Redback Spider (Araneae: Theridiidae): a review. | | | Most males do not survive this process, which seems to be unique to Latrodectus hasselti. | | | They belong to the Family Theridiidae, which is found worldwide. |
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http://www.austmus.gov.au/factsheets/redback.htm
(827 words)
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| | Homeopathy Online: Materia Medica |
| | It is important to understand that the sense that one is about to die may be connected with a wide variety of situational experiences, not only cardiac pain. | | | Two dreams, the first Latrodectus and the other Atrax, which capture most closely the spirit of the experience. | | | Life and Death: A recurrent theme in many dreams, which has been clinically verified, is a feeling of great danger and the possibility of death. |
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http://www.lyghtforce.com/HomeopathyOnline/Issue2/matmed.html
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| | The Ultimate EMS Resource |
| | If possible and safe, the spider should be caught and placed in a sealed container for positive identification and other studies at the receiving facility. | | | Eschar forms within two weeks and the patient may have an open wound requiring surgical debridement. | | | The abdominal pain can be so severe that it may mimic the acute abdomen presentation in a patient who presents with primarily abdominal cramps and muscle spasms. |
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http://www.merginet.com/index.cfm?pg=environ&fn=BlackWidowSpiderBite
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| | Refs |
| | Chernetskaya, I.I., Akhunov, A.A., Abduvakhabov, A.A., Sadykov, A.S. Investigation of cholinesterase isolated from venom of the spider Latrodectus tredecimguttatus by the method of substrate-inhibitor analysis. | | | Picotti GB, Bondiolotti GP, Meldolesi J (1982) Peripheral catecholamine release by alpha-latrotoxin in the rat. | | | Franklin, C.E. (1988) Behavioural observations and neurophysiological responses of cockroaches envenomated with Latrodectus katipo venom. |
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http://spiderpharm.com/Species/latrefs.htm
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| | Florida Nature: Latrodectus geometricus - Brown Widow |
| | Latrodectus geometricus - This is a ventral view of the same spider in the above image. | | | The spider was placed was placed directly on the scanner after it died to get this dorsal view and the ventral view in the image below. | | | Latrodectus geometricus - This female, conceiled within her silken enclosure beneath a plastic patio chair, is monitoring her eggsac. |
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http://www.floridanature.org/species.asp?species=Latrodectus_geometricus
(519 words)
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| | The World Spider Catalog, V6.0 by N. I. Platnick © 2000 — 2005 AMNH |
| | Latrodectus agoyanyang, preliminary notes on the entomological, clinical and experimental studies. | | | Parrott, A. The katipo spider of New Zealand (Latrodectus hasaseltii Thorell). | | | Dois generos raros de aranhas nas colleccoes do Instituto Butantan. |
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http://research.amnh.org/entomology/spiders/catalog/BIB3.html
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| | Florida Entomologist, v. 84, n. 3, p. 380 |
| | Although there seem to be no long-term studies of population dynamics for any other Latrodectus species, there is good evidence that natural enemies commonly limit spider population densities (Wise 1993 and references therein). | | | Because the drive-by method seemed to be a reasonably accurate way of censusing L. bishopi populations, I adopted it throughout the remainder of the study. | | | This study was undertaken in order to gain basic knowledge about the interannual population dynamics of L. bishopi. |
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http://www.fcla.edu/FlaEnt/fe84p385.htm
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| | Spider Myths: Mate and be eaten! |
| | Moreover, in the past most observations of mating took place in laboratory cages, where males could not escape. | | | The only known Latrodectus species in which mate cannibalism in nature is the rule, not the exception, are in the Southern Hemisphere. | | | To understand the facts about black widow mating, you must first understand that there are many different species worldwide in the black-widow group (the genus Latrodectus), and three different black widow species in the United States alone, two in the east and one in the west. |
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http://www.washington.edu/burkemuseum/spidermyth/myths/blackwidow.html
(455 words)
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| | A Homeopathic Proving of Latrodectus Hasseltii - Bronwyn MARKS |
| | Would you like to review or comment on A Homeopathic Proving of Latrodectus Hasseltii by Bronwyn MARKS? | | | A Homeopathic Proving of Latrodectus Hasseltii - Bronwyn MARKS | | | All reviews become the property of Minimum Price Homeopathic Books. |
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http://www.minimum.com/b.asp?a=latrodectus-hasseltii-twohig
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| | Incadenza |
| | "Kinds Of Pain" - B.S. Latrodectus Mactans Productions. | | | Latrodectus Mactans Productions/Claymation action sequences Infernation Animation Concepts, Canada. | | | Sadistic penal authorities place a blind convict (Watt) and a deaf-mute convict (Leith) together in 'solitary confinement,' and the two men attempt to devise ways of communicating with each other. |
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http://home.i1.net/~bytor/incadenza.html
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| | [No title] |
| | The proving has a rich array of reactions and dreams. | | | LATRODECTUS HASSELTII (REDBACK SPIDER PROVING) - B. Marks/J. Twohig ISBN: 0 646 35858 8 Buy The Redback was chosen as the proving substance for many reasons. | | | From these symptoms we have attempted to extract rubrics that as accurately as possible reflect the medicinal power of Latrodectus hasseltii or redback spider. |
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http://www.helios.co.uk/books.html
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| | Spiders Publications |
| | "Red-back spider (Latrodectus mactans hasselti) envenomation in a neonate." Med-J-Aust 2(12): 665-6. | | | "[Primary structure of delta-latroinsectotoxin from venom of the Latrodectus mactans tredecimguttatus spider]." Bioorg-Khim 22(1): 68-73. | | | "[Cholinesterase isolated from the venom of the Latrodectus tredecimguttatus spider using substrate inhibitor analysis]." Dokl-Akad-Nauk-SSSR 274(1): 225-9. |
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http://www.kingsnake.com/toxinology/old/arachnid/spiderspubs.html
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| | Latrodectus - definition of Latrodectus in Encyclopedia |
| | Arthropods also possess an open circulatory system by which blood is pumped directly from the heart of an organism throughout its body cavity, bathing the internal organs of said organisms directly with hemolymph—a combination of digestive nutrients and blood (Encarta, 2004). | | | Female spiders also have an epigynum (genital opening) on the underside of the abdomen, with the males possessing pedipalps attached to each side of the spider’s mouth; both have openings to the breathing organ called a book lung (Discovery Books, 2000). | | | The majority of the Latrodectus genus in and of itself breaks down taxonomically into approximately 31 recognized species, with the family Theridiidae (black widow spiders, also known as tangle-web spiders) as its most well-known group. |
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http://encyclopedia.laborlawtalk.com/Latrodectus
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| | Spiders through the Scanning Electron Microscope |
| | Antivenom is available to counteract the effects of Latrodectus envenomation. | | | Typical symptoms of envenomation include swelling of the lymphatic nodes, profuse sweating, rigidity of the abdominal muscles, facial contortions, and hypertension. | | | Brown recluse spiders (and their relatives, genus Loxosceles) and black widow spiders (genus Latrodectus) are the most medically important spiders in the United States. |
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http://www.nmnh.si.edu/highlight/sem/highlight/spiders/spiders.htm
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| | LATRODECTUS MACTANS - Pathogénésies de l'an 1900 - Robert Séror |
| | I do not know that the doctor who is the direct occasion of this paper was grim, nor do I imagine he ever dreamed of such an application of his paper as I purpose to make. | | | PREPARATION -The spiders are triturated in the usual way. | | | From these data the poison of Latrodectus mactans is suggested for trial in angina pectoris, in that its physiological action presents the closest similimum yet found. |
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http://www.homeoint.org/seror/patho1900/latrodectus.htm
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| | Black widow spider - Wikipedia, the free encyclopedia |
| | According to a widely-reported media story (Wigmore, 2003), Chilean scientists were using part of Latrodectus venom to synthesize a drug that will not only serve as a male contraceptive, but will also work in a fashion similar to Viagra; however, this has not been reported in any mainstream peer-reviewed scientific journal. | | | The venom does not typically cause problems at the bite site itself, unless a secondary skin infection occurs. | | | Although the common name 'black widow spider' is used to refer specifically to L. |
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http://en.wikipedia.org/wiki/Black_widow_spider
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| | eMedicine - Spider Envenomations, Widow : Article by Sean P Bush, MD, FACEP |
| | Latrodectus facies, characterized by spasm of facial muscles, edematous eyelids, and lacrimation may occur. | | | The redback spider (Latrodectus hasselti) is endemic to Australia. | | | Antivenin Latrodectus mactans -- Derived from horse serum and produced by Merck & Co., Inc. Consider for patients with grade 2 or grade 3 envenomations who are refractory to opiates and sedative-hypnotics and do not have risk factors for immediate hypersensitivity reactions. |
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http://www.emedicine.com/emerg/topic546.htm
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| | [No title] |
| | As with most spiders, black (and other) widow spiders bite humans only in accidental situations: Widow spiders are practically blind, and spend most of their lives in the web. | | | While definitely venomous to humans, bites tend to be less severe than those of most other widow spiders. | | | The redback spider, Latrodectus mactans hasselti, is found throughout Australia, and in some Southeast Asian countries. |
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http://www.geocities.com/Yosemite/Trails/3137/blackwidow.html
(1107 words)
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| | Widow spider - Wikipedia, the free encyclopedia |
| | It is unclear where this spider originated; however it has been discovered in many warm, cosmopolitan locales. | | | The widow spiders are members of the spider genus Latrodectus, a subset of the family Theridiidae. | | | Many of the other widow spiders have red patterns on a glossy black or dark background, which serve as a warning. |
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http://en.wikipedia.org/wiki/Widow_spider
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| | Latrodectus |
| | Redback Spider (Latrodectus hasselti), Victorian Funnel-Web Spider (Hadronyche modesta) & other spiders. | | | Information about the poison, General Neurotoxin Function, -a-Latrotoxin, Mechanisms of -a-Latrotoxin Function, Possible Uses in Medicine and Research. | | | Black Widow (Latrodectus hesperus), Brown Recluse Spider (Loxosceles reclusa), spider treatment. |
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http://www.arachnology.org/Arachnology/Pages/Latrodectus.html
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| | Black Widow Spiders by Jim Cornish, Gander, Newfoundland Canada |
| | The bite of the black widow is painful and may cause death if medical attention is not sought immediately. | | | Her body is about 1 inch long; the male is about half her size and may have a pair of reddish stripes on the sides of his abdomen. | | | The black widow spider - Latrodectus mactans is widely distributed and rather common worldwide. |
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http://www.cdli.ca/CITE/spidersblack.htm
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| | C-View MEDIA Group - The Home of REPTILIAN Magazine, Europe's Premier Herp Magazine |
| | Latrodectus hesperus produce more egg-sacs than L. mactans, with twenty-one being constructed by one female. | | | Downes, M. Postembryonic development of Latrodectus hasselti Thorell (Araneae, Theridiidae). | | | At one time, all North American widows were placed in one species, Latrodectus mactans (Fabricius) with subspecies representing what are now accepted species in their own right. |
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http://www.cviewmedia.com/Articles/AM01_WidowSpiders.html
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| | Theridiidae (comb-footed spiders, button spiders, widow spiders) |
| | All Latrodectus bites should be treated and monitored. | | | Those more severely affected are children (smaller blood volume) and the elderly who might suffer respiratory or heart failure. | | | However, Latrodectus indistinctus, or the Black Button spider presents a serious problem. |
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http://www.museums.org.za/bio/spiderweb/theridii.htm
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| | Spiders |
| | I have a feeling that the others in the US who've sent you similar photos have been likewise surprised by errant spiders precisely because their coloration is not common. | | | One of them is done molting, as she's produced two egg sacs in the last week, and the other is larger than she is. Also interesting is that the fellow who brought these in said that the markings on these were representative of the markings he found on all the females at his worksite. | | | Several species of juvenile females in the Latrodectus genus (widow spiders) tend to look similar to each other and even among the same species, the coloring and patterns tend to vary to some extent. |
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http://www.rochedalss.eq.edu.au/redblack.htm
(2484 words)
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| | Latrodectus Mactans - Homeopathic Remedies |
| | Please remember though, this homeopathy materia medica is provided for information only; it is not intended as a substitute for medical advice, nor as a claim for the effectiveness of Latrodectus Mactans in treating any of the symptoms below. | | | If symptoms persist, seek professional medical advice - minor symptoms can often be a sign of a more serious underlying condition. | | | The following are the strongest indications of Latrodectus Mactans for its use in homeopathy. |
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http://www.abchomeopathy.com/r.php/Lat-m
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| | MSc: Animal Photographs / Cobweb & Sheetweb Weavers |
| | As in Latrodectus, Steatoda-webs are characterized by strong threads. | | | This poisonous spider of the Mediterranean is a shy species - in contrast to American L. | | | This black species often has a red line on the front of the abdomen. |
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http://www.oeko-msc.de/theri-en.htm
(520 words)
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| | Black Widow Spiders and Other Spiders of Medical Importance |
| | Latrodectus hesperus: Range, habitat, description, habits, and life cycle. | | | Latrodectus lugubis has no red or orange hourglass like marking on its ventral surface as does Latrodectus mactans. | | | It may be either a systemic reaction or a necrotic local lesion. |
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http://members.tripod.com/~LouCaru/index-13.html
(3691 words)
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| | Black Widow Spider |
| | Latrodectus hespenrus Chamerlin and lvie, the "western" widow. | | | INTRODUCTION: These spiders get their common name from the popular belief that the female eats the male after mating, a phenomenon which rarely happens in nature. | | | The genus Latrodectus is worldwide in distribution, with 5 species occurring in the United States. |
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http://personalwebs.myriad.net/bugboy/blackwid.htm
(953 words)
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| | Latrodectus biography @ Tartareandesire.com |
| | Latrodectus is the scientific name of the most terrific spider in earth : the Black Widow ! | | | The fantastic album’s cover has been drawned by Bolek Budzyn which is now famous for his former work with Loudblast. | | | Latrodectus has shared the stage with bands like Scarve, Seth, Furia, Apostasia, Enthroned... |
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http://www.tartareandesire.com/bands/latrodectus.html
(258 words)
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| | Arachnoboards - Latrodectus Hesperus (The Black Widow) |
| | Latrodectus is so common and abundant here that I can't believe that they're not established in the hobby over there. | | | Also, I thought there was a Latrodectus sp. | | | There's plenty of invert hobbyists in Europe and some of them have access to some pretty amazing stuff. |
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http://www.arachnoboards.com/ab/showthread.php?t=6633
(1285 words)
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| | Black Widow Spider Bite -- Topic Overview |
| | (Latrodectus mactans and Latrodectus hesperus) are found throughout the United States. | | | Female black widows are long-legged, shiny, coal-black spiders with an orange, red, or yellow shape on their underside that usually looks like an hourglass but may be another shape. |
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http://www.webmd.com/hw/health_guide_atoz/tp21209.asp
(140 words)
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| | Family Theridiidae |
| | An analysis has been made of 2144 consecutive cases of latrodectism (envenomation by the red-back spider, Latrodectus mactans hasselti) reported to the Commonwealth Serum Laboratories. | | | She seldom ventures indoors, but anyone living in black widow territory should be aware that she sometimes makes a home in outbuildings such as woodsheds or outdoor toilets. | | | These spiders make a littery web and the webs can be described as an intersecting mass of scaffold work with a central area consisting of a three-dimensional trellis of silk. |
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http://www.xs4all.nl/~ednieuw/australian/theridiidae/Theridiidae.html
(1112 words)
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| | latrodectus cyberneticus |
| | Latro is designed to probe whether your site or sites you control have been compromised by the insanely idiotic practice of placing a perl executable in the cgi-bin. | | | latrodectus cyberneticus - probe web for insecure perl installations | | | Last update: Thu Mar 28 17:53:42 MST 1996 |
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http://www.cpan.org/authors/Tom_Christiansen/scripts/latro.html
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| | [No title] |
| | In our efforts to locate and eradicate this spider, we have also discovered two other types of spiders from the Latrodectus species. | | | Both of these types of spiders have been established in various cities throughout Japan since 1995. | | | From 2001 to 2004, we have recorded an approximate 60 to 70 percent reduction in the number of these spiders aboard the installation. |
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http://www.iwakuni.usmc.mil/releases/27-04.doc
(872 words)
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| | Black Widow Spider (Latrodectus mactans) - Chesapeake Bay Program |
| | The black widow's reputation as one of the most venomous terrestrial creatures, while accurate on the whole, tends to exaggerate the dangers presented by potential contact. | | | Latrodectus mactans, the black widow, is the largest and most familiar member of the spider family Therididae, the cobweb weavers. | | | Black Widow Spider (Latrodectus mactans) - Chesapeake Bay Program |
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http://www.chesapeakebay.net/info/black_widow.cfm
(706 words)
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| | Re: What kind of spider is velvet, black with an orange line down the back? |
| | I suspect that you may have a form of the black widow, possibly Latrodectus variolus (the Northern Black Widow), which usually has a row of red or orange dots down its back (dorsal abdomen), which might be fused in some specimens. | | | The picture you saw on the Dutch book appears to be Latrodectus hasselti (the Australian Red Back Spider), which, as far as I know, has not been imported to the United States (although it was fairly recently accidentally imported into Japan.) References: Kaston, B. How to Know the Spiders, 3rd ed. | | | Another possibility would be Latrodectus hesperus (the Western Black Widow). |
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http://www.madsci.org/posts/archives/2001-09/999639858.Ot.r.html
(177 words)
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| | Black Widow Spiders - DesertUSA |
| | The Brown Widow Spider (Latrodectus geometricus) is not as dangerous as some other widow spiders because the Brown Widow Spider is less likely to bite someone, and injects less poison. | | | Hundreds of Australians are bitten every year by the Red-back Spider (Latrodectus hasselti) a close relative, the Black Widow Spider. | | | Widow spiders (Genus Latrodectus) are the best known and largest of the Cobweb Weavers (Family Therididae). |
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http://www.desertusa.com/july97/du_bwindow.html
(1133 words)
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| | Red Back Spider - Latrodectus hasseltti |
| | This species and their close related species can be find through out the world and have different common name. | | | In Australia we call them Red Back Spider or Redback while in United States the close relative are called Black Widow (Latrodectus mactans). |
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http://www.geocities.com/brisbane_weavers/Red_Back.htm
(1730 words)
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| | EmuTalk.net - View Profile: Latrodectus |
| | Latrodectus is not a member of any public groups | | | To start viewing messages, select the forum that you want to visit from the selection below. |
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http://www.emutalk.net/member.php?u=18558
(59 words)
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| | MSN Encarta - Search View - Black Widow Spider |
| | The name is applied especially to the familiar North American species Latrodectus mactans. | | | At least three other species found in the United States are also poisonous to humans: the brown, or gray, widow spider; the red widow spider, with irregular red and yellow markings; and the northern widow spider, with a row of red spots above and two red bars on the underside of the abdomen. | | | Scientific classification: Black widow spiders make up the genus Latrodectus in the family Theridiidae. |
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http://encarta.msn.com/text_761579227__1/Black_Widow_Spider.html
(350 words)
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| | Latrodectus bishopi - Wikipedia, the free encyclopedia |
| | Latrodectus bishopi is the scientific name for the Red Widow Spider, which is found only in select parts of Florida. | | | The Red Widow has a red-orange cephalothorax, and its abdomen is black with yellow rings outlining the rows of red spots. |
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http://en.wikipedia.org/wiki/Latrodectus_bishopi
(126 words)
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| | Redback Spiders of Australia |
| | , The Thirteen-Spotted Spider (Latrodectus tredecimguttatus) of Europe and The Katipo (Latrodectus katipo) of New Zealand. | | | Redback Spiders are native to Australia and members of the Latrodectus genus which also includes The Black Widow (Latrodectus mactans), Brown Widow (Latrodectus indistinctus), |
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http://www.redbackspiders.com
(104 words)
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| | Latrodectus - definition of Latrodectus by the Free Online Dictionary, Thesaurus and Encyclopedia. |
| | This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. | | | Latrodectus - definition of Latrodectus by the Free Online Dictionary, Thesaurus and Encyclopedia. | | | black widow, Latrodectus mactans - venomous New World spider; the female is black with an hourglass-shaped red mark on the underside of the abdomen |
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http://www.thefreedictionary.com/Latrodectus
(106 words)
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| | Definition of latrodectus - Merriam-Webster Online Dictionary |
| | latrodectus is one of more than 1,000,000 entries available at Merriam-WebsterUnabridged.com. | | | For More Information on "latrodectus" go to Britannica.com | | | Get the Top 10 Search Results for "latrodectus" |
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http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=Latrodectus
(82 words)
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| | Animal Planet :: Corwin's Carnival of Creatures |
| | The spiderlings disperse soon after hatching, at which time parental care ceases and the spiderlings must fend for themselves. | | | The female Latrodectus mactans can store a lifetime supply of sperm to fertilize all the eggs she will ever produce. |
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http://animal.discovery.com/fansites/jeffcorwin/carnival/crawler/blackwidow.html
(1344 words)
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| | Florida Nature: Araneae - (spiders) |
| | There are presently two groups of venomous spiders established and/or occasionally found in isolated areas of Florida: the widow spiders (Genus: Latrodectus) and the recluse spiders (Genus: Loxosceles). | | | Extensive information on the above spiders can be found online through the Florida Department of Agriculture and Consumer Services - Division of Plant Industry: |
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http://www.floridanature.org/order.asp?order=Araneae
(479 words)
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