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Archive 1 |
in the Scientific American many years ago on the Portia (spider), a jumping and webspinning spider which preys on other spiders. The spider has two remarkable behaviors - one is cryptic movement, in which it moves while waving its legs randomly as if it was a fluttering leaf. The other is the way that it intentionally vibrates spider webs in order to lure the spiders. I hope someone who knows about spiders will write an article for Wiki on Portia. -Willmcw 23:42, 29 Dec 2004 (UTC)
is it legal to have such a cute spider picture on the article? —Preceding unsigned comment added by 210.49.216.189 (talk) 15:10, 17 July 2009 (UTC)
I agree. The picture is too 'cutesy'. While I am all for fuzzy-wuzzy stuff, could we have a better, more representative picture pleawse? Let the little monster remain though. 218.248.64.136 (talk) 06:42, 25 May 2010 (UTC)
I added a link to the "External Links" section to a video posted on Liveleak of a courtship dance where a contact microphone and membrane was used to pick up the sounds produced by the male during the dance.
The Reproduction section of the Wiki article has "citation needed" for the statement, "In recent years it has been discovered that many jumping spiders may have auditory signals as well, with amplified sounds produced by the males sounding like buzzes or drum rolls." While the video posted to Liveleak clearly demonstrates this, I'm unsure how to cite it because I don't know the source of the video. I did try searching, but it was fruitless. -Artificial Silence 01:20, 27 July 2007 (UTC)
There has been reported a species even on Mt. Everest, which feeds on insects blown there by the wind. Why is its name NEVER mentioned, and why isn't there any information about this spider?
The "tan jumping spider" on this page is actually a lynx spider. Family Oxyopidae, not Salticidae. You can tell by the eye arrangement-- Salticidae has two very large median eyes. Oxyopidae does not.
How exactly do these spiders jump? Do they have muscles that are very strong or do they employ a different mechanism?
I checked the gliding spider 'Maratus volans', and cannot find any references on it that it actually glides (although the species name volans implies this). As far as I found out (and wrote in the species article), they use these flaps for display. I could not contact the anonymous author that made the change at 23:51, 27 February 2006. if anybody has a source for this, that would be nice. --Sarefo 12:49, 24 July 2006 (UTC)
Yes I just removed that part simply because nothing is baked about this supposed flap gliding anywhere. --uniquinous
Found a possible source, don't know how relyable it is. - Bakuhatsusama 23:34, 30 January 2007 (UTC)
What is up with the map showing that these things are everywhere - is that a mistake?? Jgreenberg 02:38, 19 January 2007 (UTC)
Walking on glass depends on finding minute imperfections in the surface? Does not current theory invoke something like Van der Waals forces instead? Myron 09:06, 19 January 2007 (UTC)
A must watch for fans of these spiders: . There's information in the special not included in the article. Like the mosquitoes they hunt are filled with human blood or the extent of the hunting strategies. Alatari 15:38, 18 August 2007 (UTC)
"Further approach may result in the spider jumping backwards while still eyeing the hand." Don't they generally have eight eyes? i.e. they could probably be described as "eyeing the hand" even with their back against the hand. I think the sentence meant "facing the hand", and it should be changed to avoid confusion. Aran|heru|nar 09:57, 17 November 2007 (UTC)
Just a quick question, 'cause lord knows I'm no spider expert. How do we know that jumping spiders are "inquisitive" and "interested" rather than simply possessing an instinct to face whatever stimulus approaches? My gut reaction to these words is that they are needlessly anthropomorphizing the spiders - ascribing to them a personality they are too simple to possess. Does a spider get acclimated to stimuli? For instance, if you keep approaching a jumping spider with your hand, does it ever get "bored" of that game? Applejuicefool (talk) 11:31, 17 November 2007 (UTC)
The following sentence was added by 98.203.143.29:
The only word that bears any resemblance and makes any sense there is "cephalothorax". As that is too different from "carththrayx" and that was this IP's only edit, I have removed the sentence entirely. phma (talk) 03:59, 19 January 2009 (UTC)
"The jumping spider can jump 20 to 60 or even 75 to 80 times the length of its body." Should this sentence read, "The jumping spider can jump 20 to 80 times the length of its body." —Preceding unsigned comment added by WesUGAdawg (talk • contribs) 23:46, 18 August 2009 (UTC)
Previously this article stated that jumping spider fossils dated back to the Cretaceous period. This was cited to a 2002 paper by David Grimaldi. The Grimaldi paper only mentions salticid fossils in passing, noting that "The oldest true salticid, and only Cretaceous, is in New Jersey amber (AMNH NJ835; D. Penney, personally comm.)". This statement conflicts with every other source I've seen, including recent papers by David Penney (who is probably the world's foremost expert on spider fossils). All other sources, as of 2010, say that the oldest salticid fossils are from Baltic amber dating to the Eocene epoch. To clear up this discrepancy I emailed Dr. Grimaldi and Dr. Penney. Dr. Grimaldi replied:
"I'm in no position to weigh in on spider IDs, but there was misunderstanding (not disagreement) about the ID of the salticid-like fossils in Turonian-aged NJ amber. Indeed, all salticids are Tertiary..."
Dr. Penney replied:
"I cannot remember exactly what the misunderstanding was, although I think somebody else had identified the specimen as a salticid. When I examined the specimen I confirmed that it was not."
Based on these statements, it seems that the claim in the Grimaldi paper is probably false. Unless more information comes to light, I'm going to revise the article to reflect the more recent papers. Kaldari (talk) 21:43, 10 February 2010 (UTC)
If someone ever writes a Life cycle section, the following paper may be of interest: Bartos, Maciej (2005). "The Life History of Yllenus arenarius (Araneae, Salticidae)—Evidence for Sympatric Populations Isolated by the Year of Maturation". Among other things, it shows typical lifespans for Yllenus arenarius females in excess of 2 years (which is the longest documented under natural conditions). Most jumping spiders live for a year or less. Kaldari (talk) 01:25, 11 February 2010 (UTC)
On web the number appears to vary. How many eyes does the jumping spider have? Manytexts (talk) 11:20, 7 October 2010 (UTC)
I also found this confusing - it says 4 pairs of eyes, but there is no image where this is visible and in the illustration the Anterior Lateral and the Posterior Medial Eye seem to be the same - upon closer looking the PME is smallish brown, but no field of vision is indicated for it, which makes distinguishing it from the ALE all that harder. — Preceding unsigned comment added by 77.59.246.34 (talk) 08:32, 12 December 2011 (UTC)
I've been playing with and studying Jumping Spiders since I was a kid, so I know all of the characteristics that set them apart from other spiders, and have never even heard of anything like this.
So can anyone tell me if there is a recorded species that had the body color and distinct pattern of a Black Widow spider? If not, I call dibs on naming it, lol. I was at church 1 year ago, and saw a black body with orange/red hourglass cross the ground in front of me. Naturally I moved to squish, but stopped myself after I realized the body shape was not that of a web building spider. Upon closer inspection I found it was a jumping spider, with the typical large front eye set, twitchy movements, sideways hinged fangs; all the typical physiology of a jumping spider; except for the coloration and hourglass.
So... do these guys have camo capabilities that aren't mentioned here, or is this a new species, or just one I've never heard of? If its something we've never heard of before, it could mean a change in our understanding of Spider intelligence, since not only has this jumper copied the color and patterns of a Black Widow, but has altered it to better suit its own needs. The hourglass was placed atop the spider, rather than below as is with the actual Black Widow, meaning its the first thing any creature eying it from above sees. No doubt this is a defensive measure to scare off birds and larger insects. And how did something just smaller than my fingernail know of the danger posed by the Black Widow to other creatures?
So, has anyone heard of anything like this or should I start planning a name for this'n, lol? Maybe I'm getting too excited over this, but hey, how often does one get to find and name a new member of their favorite arachnid family? It'd be awesome by me if I could :). --99.112.26.226 (talk) 18:56, 20 July 2011 (UTC)
We seem to have an edit conflict. Bigdee removed my photo and edit before I had finished. The existing photo does not show the two eyes that are farthest back. I added the digitally enhanced photo at the request of a reader who complained about the lack of information on the eye pattern.P0M (talk) 20:59, 24 February 2012 (UTC)
If there is a sufficient problem with the resolution of the photo, a schematic could be substituted.I originally used a schematic by Pilcha, but somebody did not like that one because it included the abdomen and was deemed confusing on that account.P0M (talk) 00:48, 25 February 2012 (UTC)
Hi, suggesting to add a video to this page since i just saw another upload matching it on commons and more video on wikipedia would be great. Wanna take a look at commons:Category:Videos of Salticidae (i linked back to this article from there) and maybe insert one or even more in the article? Mutante23 (talk) 05:09, 6 October 2012 (UTC)
In the intro it currently says "Though they normally move quietly and fairly slowly...". What is moving "quietly" intended to mean? It seems to imply they don't make much noise when they move, but how would a human know without a very sensitive microphone? Is the word "quietly" intended to imply that they don't usually make sudden or fast moves, except for the jumping? It would be good to make the meaning clear either way. Thanks. Invertzoo (talk) 23:40, 30 March 2014 (UTC)
Overall, I thought that the information cited was relevant and important with regards to dimorphism in C. umbratica. One suggestion I have is maybe subdividing each of the study topics into different subdivisions and expanding each. There could be a subsection about UV light effects (which could include the information at the beginning of the paragraph and at the end of the paragraph, body size and one for maladaptive ornamentation research. Also, the Wikipedia page for C. umbratica suggests that the UV light reflection done by males has to do with sexual signaling as well and they include this link: https://dx.doi.org/10.1111%2Fj.1095-8312.2006.00704.x. While this does not directly link to your topic of dimorphism you could maybe mention it in the UV light subsection as to why males have a maladaptive trait. But as a whole I think that the content helps give a lot of good information as for the possible explanations for the dimorphism observed.Cbiology (talk) —Preceding undated comment added 23:09, 24 October 2015 (UTC)
I think the sexual dimorphism article was very interesting and well written, however, there are a few changes you could make. The first change was mentioned in the comment above regarding possible dividing the information from the studies into their own sections where you could expand a little further with greater detail. Another suggestion would be to just separate the information itself into smaller sections that contain similar details. The article is a bit mushed together and very dense, breaking it up would make it a little more manageable with the information presented. ThatEvolGuy (talk) 23:28, 25 October 2015 (UTC)
ThatEvolGuy & Cbiology:
Thanks for the peer review! I took the advice to subdivide my contributions to the reproduction section of the jumping spider's page. After subdividing, I took out much of the information referring to specific studies. Instead, I summarized the points I was trying to make in regard to the visual and size dimorphisms. I think that the information in this format seems concise and easier to follow. If you feel that one subdivision is now too broad, too general, or needs improvement, please reflect any advice/opinions again! Thanks for your contributions and peer edit again! Namaste314 (talk) 08:22, 9 November 2015 (UTC)
Overall this article was very well written. Within the article, I made a couple of revisions in order to make the article more concise. Your first paragraph was very thorough and explained courtship within the jumping spider very well. In the second paragraph, you do a good job explaining the different mechanisms by which females will choose males for mating. However, I believe that you could be a little clearer in regards to the UV reflectance and the auditory signals that you mentioned. Does sexual selection favor these traits? If so, what kinds of reflectance and sounds are favored by sexual selection? In the third paragraph, you mentioned UV ornamentation and size dimorphism in regards to how they can also attract predators. Do you think the auditory signals mentioned in the second paragraph could also produce a similar result? Is there any evidence that supports sounds increasing predation? Again, great work! Weightedswim94 (talk) 13:57, 15 November 2015 (UTC)
I really enjoyed your article! I changed some sentence and word structures at the beginning of your article and added some punctuation but not many changes were necessary. The content you displayed was understandable and concise enough to explain the complex mating behaviors. I also liked the last paragraph and how you talked about the implications of the intricate courtship rituals. That said, I think you could add a little bit about how the utilization of the courtship practices continues to remain prominent even though it is costly to the individual (the ultimate or proximate cause to the behavior). Other then that, great job! Anon 2214 (talk) —Preceding undated comment added 03:35, 16 November 2015 (UTC)
The final changes I contributed to the section I have written are as follows:
1. Correcting any grammatical mistakes, such as commas and word spelling. I have had peer reviewers outside of class on my section, which I have edited myself. (thanks for all the help wiki peers!)
2. I made some of my sentences less complex and more concise. An example is when I state that "One form of communication between some Salticids is" to "Many species have patches of." I think that this makes the topic simple, which allows for a viewer of any background to follow the section more clearly.
3. I added links to size dimorphism and sexual selection. I chose these phrases/words so that a wiki reader could click on the link and see the definition of these words, as well to see more examples of these concepts. Then the reader could compare these principles not only to jumping spiders, but other species.
4. I added internal links to other pages that direct to the jumping spider page. The two pages I chose to link jumping spiders were secondary sex characteristics and courtship display. I chose secondary sex characteristics because ornamentation fits the category well, and I thought that anyone reading this page could easily understand the ornamentation example from the jumping spiders page. I chose courtship display because I thought that the "dances" given by specific jumping spider species is an excellent example of courtship displays, especially for the male section. I added a small section of this behavior from jumping spiders to this page, and left a link for anyone that would want to investigate more into the display and its importance to the organism. — Preceding unsigned comment added by Namaste314 (talk • contribs) 09:30, 9 December 2015 (UTC)
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This article should mention ant mimicry, which is common in jumping spiders. Kaldari (talk) 18:59, 15 December 2018 (UTC)
The Wikipedia entry for this spider was extremely thorough, including information on their habitats, vision, behavior, diet, reproduction, taxonomy, and mimicry. Some of the sections, such as the one on vision had very detailed responses and diagrams like visual fields of a jumping spider. I found the discussion on the courtship and mating behavior to be very interesting, as these spiders have very complex and visual displays. Three general categories that are missing are population structure, speciation, and phylogeny, home range and territoriality, and webs. The first one would give more information on close relatives or subspecies that would give a better picture of the spider family. The home range and territoriality section would give important information on migration patterns and territorial defense strategy, which is an important behavioral adaptation of species. Finally, information on webs would also provide detail on behaviors like prey capture techniques. The article is part of the WikiProject Spiders and has been rated as B-class on the project’s quality scale and as high-importance on the importance scale. Like with the brown recluse article, I would consider this article to be mid-level importance since is covers a specific spider species rather than a general area of knowledge. Delanieludmir (talk) 03:44, 7 October 2020 (UTC)
I would like to eliminate the introductory paragraph to the behavior section and replace it with a sub-section entitled "Jumping". None of the other major sections have introductory paragraphs, and this paragraph, while mostly about jumping, has other sentences about unrelated topics: hunting behavior of Portia, pheromones on silk, learning. These three topics can be incorporated elsewhere, into the appropriate sub-sections. Fresnelwiki (talk) 15:25, 25 February 2023 (UTC)
The current paraphgraph on courtship and mating behavior says "Many species have patches of UV reflectance, which are exhibited in mature males," and references two papers on the subject, both about a particular species from Singapore. As far as I know, from internet searches, this is the only species for which UV markings on males has been verified. Therefore, I propose changing the sentence to "The ability to sense UV light (see Vision section) is used by at least one species, Cosmophasis umbratica, in courtship behavior [33],[34], though it is reasonable to assume that many other species exhibit this characteristic." Fresnelwiki (talk) 15:43, 25 February 2023 (UTC)
This sentence is in the introductory paraph to the Behavior section: "When a jumping spider moves from place to place, and especially just before it jumps, it tethers a filament of silk (or 'dragline') to whatever it is standing on to protect itself if the jump should fail," and references the highly quoted book by Foelix. Has this claim been backed up by research? Due to their small size, falling poses little or no physical danger to a Jumping spider, except perhaps to a very gravid female. I have many times seen a Jumping spider fall short of its jump target and climb back up the dragline to the spider's original perch, but I don't think this is done for safety.Some species that I have observed do not seem to do this; they simply land below their target and continue on their merry way. So, I propose removing the statement that draglines during jumps are made for protection. Fresnelwiki (talk) 15:58, 25 February 2023 (UTC)
The link to the world's biggest jumping spider video is not working. It takes you to the main page of BBC Earth. I found the same video on YouTube, so I'm going to change the URL for the reference. Fresnelwiki (talk) 02:01, 5 March 2023 (UTC)
This article was the subject of a Wiki Education Foundation-supported course assignment, between 15 January 2024 and 8 May 2024. Further details are available on the course page. Student editor(s): Etaylor345 (article contribs).
— Assignment last updated by Etaylor345 (talk) 20:58, 12 February 2024 (UTC)
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