Tiny Crayfish ID

Hello everyone!
It's probably just a Rusty or something, but can anyone figure out what this small fellow is? I found it lurking in a cave in my aquarium, thought it was a shrimp at first. The crayfish must have come in on some plants.




http://i49.tinypic.com/1ot6s7.jpg
http://i48.tinypic.com/24ybl85.jpg
http://i49.tinypic.com/e66fti.jpg
http://i49.tinypic.com/11caxl1.jpg
http://i50.tinypic.com/2zgzudk.jpg

A cute little devil... Quarter included in some pics for size. I tried giving it to my dad for bass bait but my dad actually wanted me to keep it, he thought the teensy guy was cool. It's sitting in an ice cream bucket and hiding in a painted ketchup-cup with a hole cut in to serve as a cave. It's kind of blueish-brownish with mottling and red tips on its claws and tail.

Edited by Orangespotted, 23 June 2012 - 01:19 PM.

Not a lot to go by but it does not appear to be a rusty Orconenctes rusticus. The shot showing critter on it's back makes me think O. virilis or O. immunis. Latter species, especially as juveniles are more shrimp-like with larger more rounded tails in profile. Small rustys, O. propinquis, and O. luteus if in your drainage have narrower tails and more rounded chela if they are not recently regenerated.

Not a lot to go by but it does not appear to be a rusty Orconenctes rusticus. The shot showing critter on it's back makes me think O. virilis or O. immunis. Latter species, especially as juveniles are more shrimp-like with larger more rounded tails in profile. Small rustys, O. propinquis, and O. luteus if in your drainage have narrower tails and more rounded chela if they are not recently regenerated.

What part of him could I take a picture of to help you be sure? I was trying to hurry with these shots because I didn't know how long he could stay out of the water, but I'm a little more confident in taking pictures of him now. I don't know any crayfish jargon so you'll probably have to tell me in the "Crayfish for Dummies" version.

Edited by Orangespotted, 23 June 2012 - 07:22 PM.

"Pecker-parts" of adult male (aka gonopods) during breeding season. They are the little almost leg like structures on front part of tail that tuck under legs towards mouth. Those you have are juveniles.