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Home » Guide » Arthropods (Arthropoda) » Crustaceans (Crustacea) » Maxillopods (Maxillopoda) » Copepods (Copepoda) » Calanoid copepods (Calanoida)
Photo#633555
Fairy shrimp /immature ?
Copyright © 2012 Beth Sands

Fairy shrimp /immature ?
Galt , Rancho Seco preserve, Sacramento County, California, USA
April 24, 2012
Size: 1/8"
I came upon a vernal pool which was about 20' x 20' , but only about 6" deep . I saw these little red shrimp-like fellows swimming around and thought that they must be the endangered Fairy-shrimp . Because they are so small and the day was over-cast , it was extremely hard to get a photo of . I looked at the Bugguide images of Fairy-shrimp , but they were more colorful and up to an inch long . I think that these may be immature specimens and would appreciate any comments . I know that they are not insects , but hope that the vigilant bug-hunting community has knowledge of these little fellows . Thanks so much , sincerely Beth
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Contributed by Beth Sands on 25 April, 2012 - 11:56am
Last updated 9 July, 2012 - 6:42pm

Moved
Moved from Copepods.
… Ken Wolgemuth, 9 July, 2012 - 6:42pm login or register to post comments

Cropped and moved for expert attention.
Moved from ID Request.

I think Tim must be right, but I consider this move tentative. If a copepod expert turns up, s/he will be able to confirm or correct.
… Ken Wolgemuth, 31 May, 2012 - 9:39pm login or register to post comments

 
Calanoid Copepod
A male calanoid copepod for sure. The expanded segments on the right first antenna (on the left in the image, these guys swim upside-down just like fairy shrimps) reveal it to be a male, and house the musculature that drives this antenna's geniculation. Can't identify to species - one needs to dissect the 5th pair of legs and examine under a microscope - but I'd hazard a guess at genus Hesperodiaptomus.
… Ian Gardiner, 9 July, 2012 - 4:54pm login or register to post comments

 
Hi, Ian
A couple of questions... First, would you be willing to flesh out your profile a bit, so we have some idea of your background and qualifications? That kind of information helps us to ensure that our IDs are solid.

Second, if you think this might be Hesperodiaptomus, does that mean you're relatively certain it belongs in Diaptomidae?

Thanks--and welcome to BugGuide!
… Ken Wolgemuth, 9 July, 2012 - 5:05pm login or register to post comments

 
Just in case
Ian may not be subscribed to get replies, so this may help a bit...
http://linnet.geog.ubc.ca/efauna/photoGallery/Gallery.aspx?gr=Copepods&specrep=1
… John R. Maxwell, 9 July, 2012 - 5:11pm login or register to post comments

 
You beat me to it :)
I eventually found that, too. I'm sure he knows his stuff--but it would still be nice to get some more info, if possible.
… Ken Wolgemuth, 9 July, 2012 - 6:41pm login or register to post comments

Looks like a copepod of some
Looks like a copepod of some sort..definitely not a fairy shrimp.
… Tim Loh, 25 April, 2012 - 12:29pm login or register to post comments

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