RedbackBreeder Arachnopeon. Joined Jan 26, Messages Hi people. I'm assuming that they are virtually identical, except the red dorsal marking which is only on the redbacks. I have pet redbacks and I find that I can relate to information about the Black Widows, which is very nice So here's my question: Are there any other differences between these two?
Joined Aug 8, Messages 9, I asked the natural history museum in Darwin this exact question. To the best of their knowledge the North American Latrodectus and the Hasselti are identical, several million years removed.
No solid substantiated proof exists to prove or deny this but given the age of the Aus fauna and it's isolation, it is a workable hypothesis. Joined Dec 21, Messages I watched this cool documentary about spiders.. I remember hearing about the two. They are basically the same disregarding the dorsal red back. They talked about how the red back has a slightly more potent venom not much and are generally more temperamental.
Sent from my iPhone using Tapatalk. Females mature on average in about four months. The smaller male matures on average in about 90 days. Females may live for two to three years, whereas males only live for about six or seven months. Male Redback Spiders do not produce a web, but may be found on the fringe of a female's web, especially during the summer mating season.
The male has to make overtures to the female to discover whether she is ready to mate, which can prove fatal if she mistakes him for prey. It has been found that in order to occupy the female's attention during mating, the male spider offers her his abdomen by standing on his head and 'somersaulting' his abdomen towards her mouthparts. The female begins to squirt digestive juices onto the male's abdomen while the first palp is inserted.
If he is not too weak, he will manage to withdraw, and then insert the second palp. She will continue to 'digest' his abdomen. Most males do not survive this process, which seems to be unique to Latrodectus hasselti. Redback bites occur frequently, particularly over the summer months. More than cases receive antivenom each year, with several milder envenomations probably going unreported. Only the female bite is dangerous. They can cause serious illness and have caused deaths.
However, since Redback Spiders rarely leave their webs, humans are not likely to be bitten unless a body part such as a hand is put directly into the web, and because of their small jaws many bites are ineffective. The venom acts directly on the nerves, resulting in release and subsequent depletion of neurotransmitters. Common early symptoms are pain which can become severe , sweating always including local sweating at bite site , muscular weakness, nausea and vomiting.
Antivenom is available. No deaths have occurred since its introduction. Apply an ice pack to the bitten area to relieve pain. Do not apply a pressure bandage venom movement is slow and pressure worsens pain. Collect the spider for positive identification. Seek medical attention. It was once thought that the Redback Spider, Latrodectus hasselti , was a sub species of the Black Widow Spider but it is now known to be a distinct species.
Recent research on the DNA sequences of all recognized Latrodectus species indicates that the Redback is a distinct species, most closely related to the New Zealand Katipo, and probably an Australian native. Redbacks have most likely become much more common since European settlers started providing them with lots of the kinds of places they like to make webs in. The Australian Museum respects and acknowledges the Gadigal people as the First Peoples and Traditional Custodians of the land and waterways on which the Museum stands.
The black widow and the redback spider are two very similar spider species. In fact, they both belong to the black widow category of spiders Latrodectus, which is Latin for black widow. The redback spider is also called the Australian black widow thanks to its distribution mainly in Australia.
The black widow, on the other hand, is distributed mainly throughout North America, which is also one of the main differences between the two. Both spiders have that typical hourglass pattern on their abdomens, as well as a red stripe on their backs.
However, North American black widows also have a dorsal red stripe, which allows us to easily distinguish between the two. Important Note: This is general information for entertainment purposes only. If you have been bitten, seek professional medical attention immediately. Always have professionals identify and manage your pest control needs. Both spiders belong to the genus of Latrodectus , which is Latin for black widow.
However, the redback spider belongs to the species of Latrodectus hasselti, which is different from the main black widow spider, which only belongs to the Latrodectus species of spiders. Thus, both spiders are essentially the same species with just a few differences between the two.
One of the main differences between the two is their habitat, which leads to different names. In essence, though, they belong to the genus of black widows, which is a very broad category of spiders. These are found all over the world under different names — for Australian black widows, the name is redback spider.
Both spiders have potent venom. Their venom is comparable because they both cause similar symptoms. These bites can be deadly to the elderly , small children, and those who are otherwise compromised in terms of health. However, for adults, especially healthy adults, these bites are seldom deadly. They can, however, cause some serious side effects which might take hours or even days to disappear.
0コメント