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Spider Photos - Arrow Shaped Micrathena

The spider genus Micrathena contains more than hundred species, most of them Neotropical woodland orb-weavers. Only three species occur in the eastern United States: females of M. gracilis (the Spined Micrathena) have five pairs of conical tubercles on the abdomen, female M. mitrata have two short posterior pairs, and female M. sagittata (the Arrow-shaped Micrathena) have three pairs. Micrathena sagittata  is found in the eastern United States and throughout Central America. It is a striking spider with a distinctive arrow-shaped abdomen which is largely yellow, with black depressions above and variable red and black patterning below.
Males are up to 5 millimetres (0.20 in) in length (excluding legs), but females are much larger at around 9 millimetres (0.35 in). The males lack spines. They leave a hole in the center of their web to assist in motion. There is a link to Spined Micrathena below.

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Spined Micrathena Arrow Shaped Micrathena


Arrow Shaped Micrathena (Micrathena sagittata) is a species of spider belonging to the family Araneidae. It is found in the eastern United States and throughout Central America. This is a striking spider with a distinctive arrow-shaped abdomen which is largely yellow, with black depressions above and variable red and black patterning below (see picture). Males are up to 5 mm in length (excluding legs), females much larger at around 9 mm. The males lack spines. They leave a hole in the centre of their web to assist in motion.


10 November, 2014:
Glen Sharpsburg, GA Sept. 5, 2014 What name would you give this lady? Thanks, cdc


17 July, 2014:
Hi sir, I was wondering if you know what kind of spider this is? It was on the leaf in front of our house. I've never seen one like it before. I've searched through all pics but can't find it. Thank you very much, Denise



24 December, 2013:
I hope I have attached these photos properly they were found in north east pa! Please help us figure out what they are.


Reply: This is an arrow shaped micrathena -  glen

24 December, 2013:
I've seen quite a lot of these lately - never recall them before. I'm in Central, PA. Patti


Reply: This is an arrow shaped micrathena -  glen

15 November, 2013:
I just found this spider on my front porch. I have never seen one like this around here before and wasn't sure if it is poisonous or what it is called. I'm in north Lake County Florida. If you have any information you could give me about it , I would appreciate it.


Reply: Yes you are correct -  glen

15 November, 2013::
Hi! I took this photo of a spider I found on the daylilies I was digging up. Gave it time to move off the web before I removed the ones it was on; but took a photo to show how pretty she was. Am I correct that this is an arrow back micrathena? Please feel free to use my photo, I didn't see one similar on your site. Thanks! Allison


Reply: This is an arrow shaped micrathena, the other was a spined orb weaver -  glen

15 November, 2013::
I hope I have attached these photos properly they were found in north east pa! Please help us figure out what they are.


2 September, 2012:


Reply: Not not deformed, just an arrow shaped micrathena -  glen

2 September, 2012:
Live in NH and found this guy on my house, is it a species of spider or maybe a deformed garden spider??



26 August, 2011:
G'Day! I am in southeastern Pennsylvania, USA, and I took a photo of this beautiful creature in my flower beds~I've never seen anything like it in my life! I don't know how to go about identifying it and saw your website. At this moment, he was washing his face~very cat-like. Thank you for taking a look. What do you think that colored part is? Betsy



12 June, 2011:
I photo'd this spider in Eastern Long Island, New York. Any idea what it is? Cliff



7 October, 2010:
I was wondering if you can determine if this is a spider I have never seen this before



14 August, 2010:
Taken in Mindo, Ecuador. I have several incl more of an angle to see the spikes. Thanks, Josh

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23 August, 2009:
I live in Western Pa and found this spider while working inside of our new chicken coop and was wondering if you could give me some information on it and if it belongs in this area. Thanks Kim


22 August, 2008:
Hello! I recently moved from California to Western Pennsylvania and have a few spiders that I am not sure if they are poisonous or just scary. All of them were found on cars that are just sitting around. If you need the pictures sent as a file to identify, please let me know. I am extremely fearful of spiders and have been having nightmares about these characters so I need to know what they are! My future sleep thanks you! Wendy

5 August, 2008:
Hello, Any idea what this one is? I found it while taking a stroll in the woods and almost lost my sh*&^. F**&^% awful. Cheers, Dennis P.S. I'm not really a spider fan
3 September, 2006:
Thanks so much. I am just really curious about this little guy, because he is so unusual.  I'm sure you'll tell me it's a very common spider, but no one I've shown it to has ever seen one before.  Thanks again
19 August, 2006:
Hello. I like your site, its really great how you help people out. I found this spider in a park in florida and I've looked everywhere on the internet for it but havent found a thing. I would appreciate it SO much if you would be able to tell me anything about it. Thank you so much!
18 August, 2006:
Hi could u tell me what kind of spider this is?
3 November, 2005:
I used your web site to ID this spider as Spined micrathena, isn't it beautiful?
Your web site is very informative and the photos are great.
7 September, 2004
Hey Glen my name is Dave a couple of weeks ago while camping in Michigan I woke up in the morning and found this spider species with its web attached to my tent. I have included one picture with this email but I took about 6 or 7 more pictures. The picture I sent is the top side of the spider. The bottom side of the spider is even more colorful. Let me know if you want to see them. Do you have any idea what kind of spider this is? I have never seen a body shape and or color combinations like this before. Hey maybe its a freak of nature the campgrounds is located next to a nuclear plant !!!

Reply: It is an arrow shaped micrathena - Araneidae Micrathena sagittata, one of the orb weaving family.

1 September, 2004
My son spotted this interesting spider while we were walking through a wooded area. I must admit that I had never seen a spider quite like this one. We called him a "crab" spider for a long time because the name sounded appropriate at the time, but now, after much searching on the Internet, I believe this an Orb Weaver which can be identified by family/genus/species as a Araneidae Micrathena sagittata. I'm certainly not a spider expert so my identification could be incorrect. This frightful looking fellow looks as though he could defend his own turf without any problem.
Dale Parsons
The spider and I reside in Tulsa Oklahoma USA

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