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What type of Caterpillar is this?

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My hand brushed against this last night and it burned and itched immediately. Today it's starting to blister, is red, and itches all around the bumps. I was camping at the John Knox Ranch in Fischer, Texas. It was dark and I reached to grab the chair when I suddenly felt pain. It was about two inches long. This is the reaction I initially got. I didn't even feel when i brushed against it until i started feeling pain. These were the best pictures I could get. Any help is appreciated!!

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  • $\begingroup$ see my answer update. Let me know what you think. Thanks! $\endgroup$ – theforestecologist Apr 16 at 20:31
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Picture is not very good, but I think this might be an Eastern Buckmoth Hemileuca maia caterpillar.

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Photo credit: Gary L. Spicer ; Source: butterfliesandmoths.org

Description: From the University of Kentucky:

The two-inch long Buck Moth caterpillar is brown to purplish-black with numerous yellow spots. The body is protected with branched reddish spines that may have red or black tips....

Common...from spring to mid-summer.

Reaction: Your wound/reaction would not be an unexpected reaction from touching this caterpillar species. From UFL IAFS:

The spines in the buck moth occur on raised, sclerotized (hardened) portions of the larva's cuticle that are known as tubercles and scoli. The spines found on these structures are associated with venom glands that occur within the caterpillar's body... The sting produces pain immediately, which then spreads to nearby lymphatic nodes. The caterpillar's sting then causes swelling and redness to occur. These symptoms can last for as little as a day to over a week. Wagner (2005) reported that the stings he received from a buck moth caterpillar were still present after ten days and the venom of the caterpillar caused a small hemorrhage where each spine had stung him. According to Diaz (2005), severe reactions to the venom of the buck moth (such as anaphylaxis) are rare.

  • Treatment: The video here suggests running your hand under cold water, air dry, use tape to get out remaining spines, and then apply some ice. UFL IAFS corroborates this approach as well.

Range: According to the incidence map on butterfliesandmoths.org, H. maia is found in Texas:

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Wikipedia corroborates the range of this species to include Texas.

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  • $\begingroup$ it was spiney/spikey. Thank you for your response. $\endgroup$ – Marylou Apr 15 at 13:10
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Not sure, but looks like woolen worm to me . Here in India we see a bloom in population of these around spring time(March April) People bitten by it say application of ethyl alcohol followed by fresh cream offers relief in inflammation.

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Some of the information contained in this post requires additional references. Please edit to add citations to reliable sources that support the assertions made here. Unsourced material may be disputed or deleted.

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    $\begingroup$ Could you please add, why you think it's a woolen worm? Maybe add a description and/or a picture? Furthermore, please notice that we should not give medical advice here - this is something the OP has to ask their doctors in real life about. $\endgroup$ – Arsak Apr 15 at 11:49

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