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RAVINE TRAPDOOR SPIDERS |
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Ravine Trapdoor Spider is the common name of a rare, oddly shaped North American spider,
Cyclocosmia truncata, belonging to the trapdoor spider family Ctenizidae. The
Ravine Trapdoor Spider is a burrowing spider, inhabiting sloping riverbanks and ravines in Georgia, Alabama, and Tennessee. The abdomen of spiders in this genus is abruptly truncated and ends in a hardened disc which is strengthened by a system of ribs and grooves. They use this to clog the entrance of their 7 to 15 cm deep vertical burrows when threatened,
a phenomenon called phragmosis. Strong spines are located around the
edge of the disc. The four spinnerets are found just anterior to it,
with the posterior, retractable spinnerets particularly large. The
disc diameter in the females is 16 mm.
The individual species are separated from each other by the pattern of the abdominal disc, the number of hairs on its seam, and the shape of the spermathecae.
The female reaches a body length of 1.2 inches (3
centimetres). The male grows to 0.75 inch (1.9 centimetres).
This species can be incredibly difficult to find due to the superb camouflage of their burrows.
Colonies of Cyclocosmia truncata tend to be focused within certain micro-habitats. They are primarily found in hilly, undisturbed woods that are far from any flood-prone bodies of water, such as rivers (They are frequently found near stream banks, however).
The burrow is a vertical tube that narrows toward the bottom. Only
the bottom portion of the burrow is silk lined. |
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Reply: This is another Ravine Trapdoor Spider. The scientific
name is Cyclocosmia truncata. - glen
2 August, 2010:
found this guy in my backyard today - located in Franklin, TN. a few friends commented on my photo saying it was a trapdoor spider and one friend led me to your website. i think this is what you have
labelled as a myglamorph. wanted to share these pics with you! |
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Another Reply: The spider with the flat abdomen that was found on
August 2, 2010 is probably a Ravine Trapdoor Spider. I have found them many times in Tennessee and they are very common here. The scientific name is
Cyclocosmia truncata.
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Reply: This is some sort of a myglamorph like the trapdoor
spider but I have never seen one with this shaped abdomen - very
unusual!- glen
2 August, 2010:
hi there someone send me this email and i want to know what is it are you know abut this kind ?
is that normal ?
please tell me what you know abut it |
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20 July, 2008:
hello....recently i found this spider while i was digging in my yard...there is no information on it anywhere that i have looked....its very vicious, walks around on ten legs,,ten legs?...bites anything you put in front of it...there was no webbing no rock no tunnel no nothing...just this thing balled up in the dirt about a foot down...almost like it was hibernating or something...seemed really pissed off that i woke it up...dosent like the light...i dont know what to do....i took some pictures of it and hopefully you can tell me what it is...
thank you for your time and concern...
sincerly...brandon..
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OTHER TRAPDOOR SPIDERS |
Reply: This is a trapddor spider- glen
21 August, 2010:
Can you identify this? It was found in Arlington, Texas. thanks, Leslie |
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Reply: The green one was a lynx
spider - glen
14 August, 2010:
Glen,
I like your web site, it's very informative. As an Arachnophobe, I like to get to know what type of spider(s) I may encounter (friends close but enemies closer). Spiders give me chills but I'm not deathly afraid. I'm from Washington State and currently live in California. I've seen my share of Hobo Spiders, Garden Spiders, Wolf Spiders (been bitten by one), Black and Brown Widow's, a Recluse or two, and even Banana and Huntsman Spiders (Japan and Okinawa). But the photos of the spiders I'm sending you left me dumbfounded the day I saw them. I read that they're not dangerous to humans but I still wouldn't want to get bit by them. The green one is an awesome looking Garden Spider I saw in Oceanside, CA and the other is a Trapdoor Spider that was fished from my in-law's pool in San Diego, CA. I hope you like them enough to post on your site. Thank you.
Sincerely,
Adam |
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Reply: This also looks like a
male trapdoor spider because of the extra long pedipalps - glen
19 July, 2010:
can u help me i found a spider not sure what kind it is i have three boys two is young & now getting where they want 2 explore just want 2 know what im dealing with i dont want 2 kill them but just need 2 know oh yeah i live in east TN. close to the smokies mtn.
thank u much 4 your time
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Reply: It looks like a
male trapdoor spider because of the extra long pedipalps on
either side of its fangs - glen
9 January, 2010:
Hi Glen,
Could you tell me if this is a female Trap-Door spider? found this at a high school in Perth, Western Australia.
Here is a youtube link (excuse the swearing) http://www.youtube.com/watch?v=N_pSzuQKquQ
Regards,
Mezo.
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Reply: This looks like a
male trapdoor spider (from the long pedipals that look like
extra legs) who has gone wandering looking for a mate
and fallen in your pool - glen
23 December, 2009:
Can you please tell me what kind of spider this is? It was found in Santa Paula, California. It had fallen in my pool. I had rinsed out my
Christmas tree near that side of the pool, could it have come from Organ? It looks like it has 10 legs but two of them have dangers on the end of them.
Thank you for your help,
Chad
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Reply: The first one looks like a
male trapdoor spider but the second one I can't tell from the
photo - glen
23 November, 2009:
Hi how are you,
Can you identify the spiders on the attached photo? I am a Dutch tourist
and stumbled over the first (210) in Eucla, WA and the 2nd (152) near
Streaky Bay in SA. Thanks for helping!
Best regards, Ronald
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Reply: This looks like a
male trapdoor spider - glen
23 November, 2009:
Hi, I live in southern New Jersey, USA and I was hoping you could tell
P> me what this spider is. It looks exactly like the California trapdoor spider except I found it by my front door in New Jersey so I am
assuming it's not that.
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Reply: This looks like a
trapdoor spider - glen
23 October, 2009:
Dear Glen,
I found this spider in my house in Pacifica, CA, just south of San Francisco. My first thought is tarantula, but I'm not sure, and I can't find any pictures that are just right. It's definitely way out of range. For size, I put a US quarter in the galss, about one inch in diameter. I would guess that the leg span stretches out about four inches or so.
Any feedback?
Thank you.
Regards,
Chris
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Reply: This looks like a
trapdoor spider - glen
8 September, 2009:
Hi I wonder if you can help us, we’ve found this spider in our swimming pool pump house and don’t know what it is or how to approach it, at present we’ve just closed the lid and are hoping it dies. We live on the costa blanca in spain.
Many thanks
Wendy
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4 April, 2009:
In Dallas, TX. This lovely creature (~2 1/2 inches) ended up on my foot while walking through a cemetary. Have browsed many pics but can't seem to ID this. Here's a view from the top and from the underside. Can you help? Thanks!
Chris |
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More Info from Mia:
14 April, 2009:
We have successfully identified our spider (Named Trapper) Your right she wasnt a wolf spider but a varation of Trapdoor spider closely related to a Tarantula. Ive been trying to figure out some more info in regards to her such as possible hybernation or dormancy and an approximate lifespan. A lil info I thought I would pass on to you.
Calisoga longitarsus
"Trapper is no wolf spider though. Those eyes are all wrong.
This is definitely one of the mygalomorphs.
Where do you live? I'm guessing California or out west for sure.
Appears very much to be a female Calisoga longitarsus from the Nemesiidae family (Tube-trapdoor spiders).
Sometimes referred to as false tarantulas due to the resemblance of their relatives.
She's not dangerous, I can assure you of that.
Her bite will be painful most likely (in the event of a bite), but should be no worse than that of a bee sting and symptoms should subside within 24 hours.
That being said, I'm not sure how well this spider will enjoy being handled so I advise caution.
People tend to label any large hairy spider as wolf spiders when the don't know any better. Wolf spiders are actually pretty easy to identify once you know what to look for as they have a rather distinct eye pattern. Spider families are differentiated mostly by eye patterns.
A good resource for this can be found here: http://bugguide.net/node/view/84423"
I have a few more pictures if you would like as well here is the link for the page she is currently housed upon on your site http://spiderzrule.com/trapdoor1.htm
Many regards and thanks so much once more
Mia
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Reply: This could be a trapdoor
spider but it is rather light in colour. It doesn't have the
correct eye pattern for a wolf spider- glen
22 November, 2008:
I live in Northern California in the Tahoe area.
My neighbour just across the driveway found this in her front
yard. I've caught what I think it be a female and she is
thriving. However, Im perplexed. Just what is she? I at first
thought a Trap-Door Spider. She does burrow but has no trap
door. Instead its lined in a fine layer of webbing inside and
out. So I am thinking maybe a Burrowing Wolf spider. Could you
please shed some light? Also how venomous would she be? Ive not
handled her and I really don't intend to. But we have grown to
love her and its really for curiosty sake. Thanks a ton for your
help and wonderful site. Keep it up. |
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Reply: This looks like a
trapdoor spider - glen
10 November, 2008:
Glen,
I stumbled upon your web site and came to the conclusion that you are the "Spider Man"! I thought you might be able to help me identify this spider. This is the second one I have found in my house. The first one we found running across the floor this past Saturday was twice the size of this one but looked just like it.
Thank you in advance for your time.
Sincerely,
Tonya
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Reply: It is not a hobo.
It is some sort of myglamorph, perhaps a trapdoor spider even
though it is a bit light in colour, so I'll include it in this
section as well as the myglamorphs. glen
9 November, 2008:
Glen, found this guy crawling on my buddy at work last week (Southern Idaho). We both thought it is a Hobo. Over the next few days, we saw 5 or 6 more just like it. They are rather large at about 1 1/2 inches long. Please let me know what it is.
Thanks,
Ken
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6 July, 2008:
This is a spider I found on my back patio last night we had very heavy rain and I thought it was trying to keep dry ??
I have tried to find out what kind it was and think it’s a trapdoor spider looking at some pictures on the net. I live in Mandurah Perth Western Australia..
any way I didn’t want it in my garden as I wasn’t sure it was a safe spider to have and I have very small dogs so I released tonight in the bush took this pictures hoping some one might know what it is ....
thank Mandi
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3 May, 2008:
Hi Glen, I think these were little Trapdoor Spiders. I have
seen them a lot since it's turned warm again. Feel free to use
the pics if you want. --Damy
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22 December, 2007:
I found these two big guys at the bottom of my pool after a rainy
night. I scooped them out and they were soggy and lifeless. I put
them in a container to see if possibly they would come back to life,
which luckily they did! An hour later they were crawling about
inside the container. They seem to have hard "shell-like" bodies.
Can you tell me what species they are? I plan to keep them for my 7
& 8 year old kids to see before putting them back in our yard (far
away from the pool!) Thanks, Janene W.
PEOPLE SHOULD KNOW THAT JUST BECAUSE AN INSECT IS AT THE BOTTOM OF A
POOL, DON'T ALWAYS ASSUME THEY ARE DEAD. SOMETIMES THEY JUST NEED TO
BE NETTED OUT OF THE POOL AND PUT IN A CONTAINER TO "COME BACK TO
LIFE". LATER, YOU CAN SET THEM FREE BACK INTO YOUR YARD, AND YOU
HAVE DONE A GOOD DEED FOR THE DAY! |
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8 September, 2007:
Hi Glen--
Great page! My wife found this spider near Parkesville,
on Vancouver Island,
B.C. (Canada) on the beach at low tide (it was in a spot
that was definitely
covered by the high tide earlier that morning). The
naturalist at the park
info hut couldn't ID it (she did say there was a species
of tarantula on the island). Its head and body are about
1.5 to 1.7 cm, and from tip of front leg to tip of back
about 3.75- 4.0 cm. I have supplied two photos -- on my
rather old and dark display the high contrast one I
manipulated in iPhoto shows the markings on the back
more clearly. Its head parts were rather pancake flat
(almost as if it had been stamped out in a die) compared
to the bulbous abdomen with its markings. A couple of
days later I saw a
smaller one just at the edge of the forest near the tide
line. Thanks, Mark
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September, 2007:
Hi Glen, Thanks for answering my email and for posting
my Hobo spider pictures on the website. I thought you
might also like those nice shots I recently did of an
orb-weaver and of a trapdoor spider. Best wishes,
Françoise
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3 September, 2007:
Hello, I'm a spider phobic living in Sequim, WA, now
spider heaven with the warming... I have lots of pics but
will only ask about this one... a fearsome looking tribe of
them are taking over my garage.
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Reply: This is more likely to be a male
trapdoor spider - glen5 August, 2007:
Greetings!
Fished this one out of the bottom of my swimming pool in
North Carolina – it was still alive! and after a time it
crawled away. I think it’s a wolf spider, but wanted to be
sure.
Thanx!
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28 January, 2007:
I found this spider inside my house in the Perth Hills. Can you
please confirm if this is a Trapdoor, Wolf or other
spider...Thanks
Mal
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22 October, 2006:
Hello,
I'm sure you receive many requests and do not have time to
respond to
each. I'm also sure that the vast majority of these requests are
sure
they have a specimen of the more dangerous sort. I'm no
different it
would seem.
Everything I read says not possible, but after looking at what
seems
like every spider picture on the internet, I keep coming back to
the
sydney funnel web. It looks like male, but I can't make out any
spurs
and he won't cooperate and show me. The only problem is this
spider was
caught in my living room, about 7500 miles away from where it
should be. I'm located in the US, Washington State (Spokane).
Hopefully these pictures are sufficient, but please request
additional
photos if you like (esp the underside shot). Higher resolution
image files
are available. This wasn't my idea of the most comfortable way
to
learn macro photography.
My preference is to be completely wrong-- in the interest of a
good
nights sleep. We have (or had) fresh cut flowers in the house,
which is
the only way I can think one of these gets so far from home. I'm
convinced at this point it would survive the trip because it has
been
outside for 48 hours now and is still very much alive and our
temps are
dropping quite low at night.
Thank you,
Jason
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Reply: This is
probably a male trapdoor on the move, Sydney funnelweb
spiders only live around Sydney. glen |
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16 September, 2006:
I
am sending two photos of a spider found in my wooded lot in
North Central Texas. Since I have children playing in the yard,
I have captured him before and relocated him away from the
house, but he or it has returned. I would like to know if he is
poisonous and exactly what kind of spider he is. He reminds me
of a tarantula, but much smaller. One photo is blurry, but gives
you an idea of his size. I would very much appreciate your help,
as I do not want to destroy anything unnecessarily. Kaye Boyd,
Paradise,
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21 August, 2006:
Hi
Glen, Here I am again. Sometime ago I mentioned that I was
trying to get some outdoor photos of the Sydney Brown Trapdoor
Spider. I was able to get some last Thursday and thought I
would sent a couple to you for your wesite if you care to use
them. This trapdoor is a female and is quite fiesty as trapdoors
go. She is quite large, about 30mls to 35 mls in body length.
and shows the very nice brown colouration of this species.
Hope you like them, Regards, Col Halliday
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view.
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11 June, 2006:
I
have a Sydney Brown Trapdoor that I am feeding and growing and I
have attached a couple of photos of her which you may want to use on
your site if you feel they are what you are lookng for. Collin
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24
December 2005:
Hi Glen, While I was hiking in Victoria's alpine area (Australia) I came
across a spider. Size is approx. 60-70mm. Do you know what
species this is. Hope the photo is good enough.
Best regards,
Mark
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19 December,
2005:
Hi. Although your site is very extensive, I have not been
able to determine what type of spider this is. We live
outside of Austin
, TX and we found this guy in our garage. He could have been
forced into the neighborhood by nearby construction. He has
fangs and very distinctive/unusual markings on his bottom
side.
Pic 34 is a view of his bottom
Pic 16 is also for scale
Pic 17 is a view of his top side
Pic 19 is his overall profile
Thank you so much for any information you can give me.
Angel G.
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Reply: This is a brown trapdoor spider.
http://www.amonline.net.au/factsheets/trapdoor_spiders.htm
15 December, 2005:
Hi Glen I now have the occupant of the burrow! Any chance you could
tell me what it is and whether I need to do something about
it?
Thanks for your help,
Kelly.
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27 November, 2005:
Here are some more spider pictures that we have recently taken. We had a
huge storm come through and found this on our porch this morning.
I've looked at pictures this morning and it looks like a trapdoor
spider. It was huddled in a way so we had to try and get it to open
up, which didn't make the spider too happy.
Dawn G.
Kingsville, Texas |
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Reply:
In looking at other photos from this page
http://www.whatsthatbug.com/spiders.html, they have it
identified as a female trap door spider. Dianna Ray
3 October, 2005:
Hi Glen, Excellent site. I was hoping to have this aggressive spider
identified. I live in San Antonio, TX. Found him today (10-12-05) in
my garage crawling fairly slowly against the wall. Around an inch
and a half long. Not the best climber as it had trouble climbing
vertically out of a 2" cardboard lid. Reared up and attacked
anything that got close to it (wet cotton ball, popsicle stick... I
have a video clip if you want it.) I thought it might be a Southern
House Spider, but doesn't quite fit the look. Looks very similar to
a Sydney funnel spider, but I don't live in Australia, and perhaps
it's a bit small. His fangs have quite a grip (on the stick). I
didn't see any other spider that had such short, stout legs and the
glossy body. Can you help me? I'm concerned about whether or not it
is venomous since I have an 8 month old that's starting to crawl
around. Also, any pointers on keeping him alive (feeding, shelter,
etc?) Thanks a lot. Aaron |
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Reply: It is a male
and some sort of a myglamorph. Possibly a Trapdoor.
7 October, 2005:
I found this big guy in a water bowl what kind is it and is
it and is it harmful, it looks thicker bodied than I usually see
around my area(coastal North Carolina) |
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Reply: Could be a trapdoor spider.
23 September, 2005:
Today my dog caught a spider that I have never seen before.
It is about the size of a half dollar. It is black with a big butt
that is attached by a very small tube. The Butt is white with spots
on the bottom. It has 10 legs and pretty big Fangs. It is black and
it looks like it has some sort of shiny black armor on its back and
chest area. its legs are hairy. I live in Oregon if this helps you.
I will try and send a picture soon so you can get a look at this.
Thank you for your time.
Andy |
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