CLOSED: Another Grub

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fisherwink Sarasota, FL Jan 23, 2010

Seeking confirmation. I believe this is the larval stage of the Family: Scarabaeidae.
Subfamily: Dynastinae. Rhinoceros Beetle. I checked the previous grub post and it does look a bit different. Anyone know for sure? Thanks.

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fisherwink Sarasota, FL Jan 23, 2010

another image.

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fisherwink Sarasota, FL Jan 23, 2010

third image.

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suunto Sinks Grove, WV Jan 23, 2010

You likely would have to dissect the mouthparts to be certain, but the overall appearance of this specimen appears to me to be more consistent with the subfamily Melolonthinae than Dynastinae. How large is it? You also might try your luck running it through the key to larvae at http://tinyurl.com/yfnmepq

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fisherwink Sarasota, FL Jan 23, 2010

Thank you. Good link. It's 1.5 inch in length. Here's one more...

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suunto Sinks Grove, WV Jan 23, 2010

Again, one would have to dissect out some of the mouthparts to be certain, but it still looks more like a Melolonthinae to me, especially in view of its size. See http://tinyurl.com/yaycktl for an example of one from Florida.

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fisherwink Sarasota, FL Jan 24, 2010

Thanks again for the help. Checked the link. Looks to be a match.

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fisherwink Sarasota, FL Jan 24, 2010

I have received several responses of the ID on BugGuide.net
After numerous searches and links, I'm getting more convinced this is:
Stategus Antaeus - Ox Beetle.
In the past 24 years I have seen a good number of these.
Still unsure though.


This message was edited Jan 24, 2010 9:27 AM

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suunto Sinks Grove, WV Jan 24, 2010

I would have some reservations about that i.d. - carefully compare your images to those of ox beetle larvae at http://tinyurl.com/ykku4yz (head capsule sculpturing and terminal antennal segments) and http://tinyurl.com/y9kdumv (shape of spiracles). But again, the only way to be absolutely certain of its identity would be examination of its mouthparts under magnification.

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fisherwink Sarasota, FL Feb 19, 2010

This is a back walker. No definite ID so far.
Last post on BugGuide ID as Cotinis larvae (Cetonid).
http://bugguide.net/node/view/366451

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suunto Sinks Grove, WV Feb 20, 2010

Did it straighten out and crawl on its back as in http://tinyurl.com/ydvh4ns ? If instead it maintained a 'C' shape, it would be unlikely to be a Cotinus.

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fisherwink Sarasota, FL Feb 20, 2010

Yes it did. I was surprised when it took off across the countertop. Tough live subject to photograph. I tried slowing it down with a short stay in the frig. The lights warm him up quickly. Still alive and living in a bucket of dirt. I guess this can be marked as solved.
Thanks for the feedback.

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