Currently viewing the category: "Crevice Weaver Spider"
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Larger black and brown spider maybe tarantula
Thu, Jan 29, 2009 at 7:50 PM
We live in Dayton Nevada 15 miles from Carson City Nevada. My husband found this spider about 2 weeks ago underneath a board outside. In the last 2 weeks he/she has doubled in size and loves crickets. When we first found him/her was half the size it is now ( body is about 1 inch long and with the legs about an inch and 1/2 long. When we first found him/her it was all black now the rear end of the spider is a silky brown very short hair on the rear end and two back legs, upper part of the body is slick looking as well as the front two sets of legs. It appears that there is a set of eyes in the middle of the head, almost in a prymaid looking area. The spider has very larger feeder arms on the front as well.
The spider really doesn’t make webs, it seems that it only webs so that it can’t eat whatever it has bitten. So is this a baby tarantula? Thanks for your help.
Jennifer DeForest
Dayton Nevada

possibly Young Tarantula

probably Crevice Weaver Spider

Hi Jennifer,
All of your photos are quite blurry, but we believe this may be a young Tarantula in the genus Aphonopelma since the markings match some images posted to BugGuide. We will contact Eric Eaton to see if he is more certain. Is this spider now being kept in captivity? Are you, by chance, related to our good friend John who is a landscape architect in Laguna?

Fri, 30 Jan 2009 08:20:17 -0800 (PST)
You aren’t kidding about “blurry.” LOL! Impossible to be certain, but I think that the spider is a “crevice weaver” in the family Filistatidae. They should stop feeding the thing for awhile, too. Spiders are opportunistic predators, and will overeat if fed too regularly (in the wild they don’t know when the next meal is coming).
There are some great images of filistatids over at Bugguide that they can compare to. I’m pretty certain this is not a tarantula.

Here is an after thought, I was researching on bug guide and I believe now that this is either a trapdoor spider or a Crevice Weavers (Filistatidae) »Kukulcania  I can not tell which. After looking through the pictures and looking at my spider, I see that he has bands on his legs where they attach to the body. I would better describe the hair as velvet looking. I just can not decided which spider he is and if it is a he or a she. I have also noticed he has atleast 1 dimple on his butt, and no spinnerets. I am unsure if either of these spiders are supposed to be in my area.
Thanks for all your help.
Jennifer DeForest

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Specific recluse
Wed, Nov 26, 2008 at 10:56 PM
Hi, I found this presumed reclusa spider in my house in Tucson, AZ. I know browns aren’t thought to be native here, but this is the fourth one I’ve found. This is the second one inside the house, and the other two were in the garage and back porch. Would this be a desert recluse, an arizona recluse, a brown recluse, or another species??
Tucson, Arizona

Recluse Spider

Male Southern House Spider

Hi Clay,
We too are unsure exactly which species of Recluse Spider in the genus Loxosceles you have photographed.  Exact identification may take a spider expert and may require actual examination of the specimen.  BugGuide posts a map with species distribution, and it seems Loxosceles apachea, Loxosceles arizonica, Loxosceles deserta, Loxosceles kaiba and Loxosceles sabina can all be found in Arizona, but there are no photographs identifying the differences between the species.  Both
Loxosceles apachea and Loxosceles arizonica have ranges near the Tucson area. BugGuide also indicates of the Loxosceles:  “Brown spiders will not bite unless provoked. Little is known about the venom and bite of the lesser-known species of brown spiders. ‘Although there are suspected variations in virulence among the species, all Loxosceles spiders should be considered potentially capable of producing dermonecrosis to some extent.’ (Arachnids Submitted as Suspected Brown Recluse Spiders (Araneae: Sicariidae): Loxosceles Spiders Are Virtually Restricted to Their Known Distributions but Are Perceived to Exist Throughout the United States by Rick Vetter). Loxosceles venom is cytotoxic to humans. “

Update with Correction:  July 23, 2012
Thanks to a comment, we have corrected this posting.  This is actually a male Southern House Spider,
Kukulcania hibernalis.  See BugGuide for additional information.

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Spider – kukulcania, southern house spider?
We saw this spider on the side of our apartment in Las Vegas, NV. We’re not entirely sure what it is, but the best we can identify is the perhaps Kukulcania hibernalis (or loxosceles, but we hope not!) You can see in the picture that it has big black hairs on the legs, and the legs start out as a beige/yellow and end with a darker brown/black at the “feet.” We couldn’t exactly identify a “violin” on the back, but we didn’t have much for a frame of reference; however, the kukulcania seems to have the squarish abdomen, while the recluse seems to have a larger, bulbous abdomen. We also didn’t observe the double row on 3 eyes that the recluse is said to have. Overall, the spider’s diameter including its legs and feet were about the size of soda can. We were about to give up and call this a violin spider/recluse, but then saw on page 9 of the Spiders the conversation about the kukulcania, and are happier with that identification in regards to correctness and the related degree of danger! We hope this picture will be a good addition to your pages, and thanks so much for having a great website to research through! Best wishes,
Trish M., Las Vegas NV

Hi Trish,
We disagree with both of your suggestions, but are unsure ourselves. We are thinking perhaps one of the Tengellid Spiders in the family Tengellidae based on images we found on BugGuide. Wikipedia has some information. We will try to get Eric Eaton’s opinion. If we are correct, this is a new family for What’s That Bug?

Correction: We Were Wrong and Trish was right!!!
Daniel: No, but if I hadn’t seen the thing before, I would have absolutely no idea where to begin! The image is of a male “crevice weaver” in the genus Kukulcania, family Filistatidae. Many folks mistake them for a brown recluse, which they do resemble at a cursory glance. Females look more like diminutive tarantulas and are darker in color. Crevice weavers are not dangerously venomous to people, but are common inhabitants of homes, usually on the exterior of the house, though.

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Big Spider from South Carolina
Dear Bug Man,
Last summer I had a slight infestation of quite large not overly hairy spiders. It seems like I took out about three this size, including the one which ran across my face at 3 am . After jumping from my face, it hit the carpet with an audible thud. We have a very spider friendly attic and had a bit of a spider sized gap on one end of the pull down attic access stair. I’ve since sealed the crack around the door and haven’t seen more of the big guys. This specimen was found trapped in our bathtub. I could actually hear it scratching around on the sides of the tub in an attempt at escape. If I remember correctly the leg span was around 2+ inches… wish I’d put a ruler next to it. I would have done a “catch and release” but its level of activity made me hesitant to let it out of my sight so I dispatched it with a blast of tile cleaner. I just didn’t want this thing running around in my house with my 5 year old daughter if it’s a bad one. Just so you know, with my daughter carefully supervising, I typically catch and release just about every jumping spider, brown house spider, frog, lizard, etc. which manage to make it into our house. Recently, I’ve noticed a good number of very pale off white or cream colored baby spiders with very fine long legs and about this body shape turning up around the house. They are about 1⁄4” in size (leg span) and are very hard to see because of their color. If you identify the attached photo as being something scary, I’ll definitely try to get an image of the little ones and send it along as well. I know you are covered up during this “buggy” time of year, but I hope to hear from you on this one. I’ve yet to be able to positively make a match to the photos I’ve found on the web. Many thanks,
Kert Huggins
Hilton Head island ,South Carolina

Hi Kert,
My what impressive pedipalps your spider has. We believe this is a Giant Crab Spider in the genus Olios. There is a photo on BugGuide of Olios faciculatus that is a near perfect match. The biggest difference we notice is that the legs on your spider seem considerably more spindly. We would love to get another opinion on this identification.

Update: (07/01/2007)
Olios spider or something more dangerous?
I am not a spider expert as you know, and for sure you may want not to post this alarming suggestion until you are a lot more sure about it than I am, but the non-hairy legs and the shape of the legs makes this look like a recluse to me, maybe like a male of the Chilean recluse? (the Chilean recluse is larger than the brown recluse.) I can’t exactly see if there is a violin-shaped mark on the cephalothorax… But take a look at: /pi/enpp/ento/loxoscel.html

Hi Susan,
We did not want to be alarmist about this, but the stated size and the lack of the identifying violin mark stopped us from posting the nagging suspicion that this might be a Recluse. Perhaps it is time to sound the alarm and see if we can get an expert to weigh in.

Update: Male Crevice Spider (07/02/2007)
Hi Daniel,
I managed to get two spider experts (one in FLA and one here in NYC) to weigh in on the scary-looking spider from South Carolina, and the good news is that it is NOT a Recluse at all (and not an Olios either) but a male crevice spider, Kukulcania hibernalis, family Filistatidae. I asked them if I can send WTB their detailed replies. Let you know soon I hope. Arachnologist, Florida State Collection of Arthropods: “Hi Susan, The photo is of a male crevice spider, Kukulcania hibernalis, family Filistatidae, a species often mistaken for a recluse spider. These are common through the Southeast, especially on buildings. I frequently encounter them in my house. Females have a body length of about an inch, are dark charcoal gray in color, and make flat, very sticky, cobwebs in corners, and around windows and doors. While the females can give a painful bite if trapped against bare skin, the net effect is similar to a wasp sting. It doesn?t cause necrotic wounds like a recluse. When I see males wandering around my house, I pick them up and throw them outside. Hope this helps. Best wishes”

Hi Susan,
We want to give you and the Florida State Arachnologist a great big thanks.

The second Expert ID on SC spider
This from Louis Sorkin, AMNH, some info that might be useful for you Daniel: “Not a Loxosceles species, nor Olios, but could be a male Filistatid of genus Kukulcania. Hard to tell from the photo even though I downloaded it and magnified it, it wasn’t high enough resolution.Also meant to point out that the eye arrangement is not like an Olios at all, which has 2 transverse rows of 4 eyes each, while the Loxosceles has 3 diads of eyes (6 total). Filistatid spider has a concentration of eyes in front third of cephalothorax, so no diads, no discernable transverse rows. Kukulcania males have long legs and slender body compared to females. His palps are also elongated, but hard to really see the tips in photo. Louis”

(07/02/2007) Big Spider from South Carolina
I was just about to write and ask it the crevice spider was a possibility based on an image in the following link you sent earlier. The flat very stick web confirms it! They are present all around the gable end vents in my attic space. What appears to be bare wood is covered in a very sticky almost film like layer of web. I was concerned about the potential of a type of recluse as we have relatives in Florida and receive boxes from them regularly. We also spent 3 years in Gainesville, Florida while my wife attended U.F. so a stowaway was a possibility. Thank you so very much for the extraordinary lengths you went to make this identification. I will sleep much better tonight!
Kert Huggins

Great detective work by everyone on the male crevice spider! The angle of the image managed to camouflage those incredible pedipalps, which are a hallmark for ID of the males.
Eric Eaton

I have looked around with Google and wanted to also let you know that this spider seems to be most often known as the ‘Southern House Spider’ which makes it sound even more common and even less threatening… Best,

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big black hairy spider
i live in the desert by palm springs and found this huge spider it was at the bottom of a cup .looks like a small tarantula to me .all black with grey body hairy and fangs big fangs .It chases my finger. please help me thank you

Hi Tanya,
We sought out Eric Eaton for advice. Here is what he believes: “Pretty sure this spider is a Filistatid, family Filistatidae, probably Kukulcania. There are some nice images on bugguide you can compare to. I can’t see images on my WebTV that well, actually. Eric ” These are commonly called Crevice Weaving Spiders.

What's That Bug? does not endorse extermination