This small crustaceaen appeared in a zooplankton sample from a small reservoir in Costa Rica. Unfortunately we were not able to find it again to take a better picture. We would appreciate any hints about its identity.
The zooplankton net probably touched the bottom or the littoral zone before the hawling because the sample contained some organic debris, whcih could be observed to the left of the organim.
It does not look to me neither as a cladoceran, nor copepod or ostracod. Because of the separated eyes and bifurcated caudal appendix, it reminds me of a juvenile isopod, but it's not sure at all from that picture. I can't see the suckers if it would be and Argulidae, but I have no experience with them.
It does not look to me neither as a cladoceran, nor copepod or ostracod. Because of the separated eyes and bifurcated caudal appendix, it reminds me of a juvenile isopod, but it's not sure at all from that picture. I can't see the suckers if it would be and Argulidae, but I have no experience with them.
Dear Gerardo,
I would look in the direction of Argulidae, fish louses.
Best
Estimado Gerardo:
Lo que tienes es un embrión de algún cladócero presente en la localidad. Si pudieras mostrar una vista lateral, esto seria de gran ayuda.
Saludos cordiales,
Carlos
Hi, every one
Argulidae seems a good guess, it is flat and has only a few limbs in the hind part... We'll try to get a better picture. Thanks a lot to all of you
Gerardo Umaña V.
I don't think it is crustacean (no exoskeleton, no segmentation, no appendices...). it rather looks like a micro turbelaria (plathyhelminthe):
http://images.google.fr/imgres?imgurl=http%3A%2F%2Fwww.photomacrography.net%2Fforum%2Fuserpix%2F925_turb2_1.jpg&imgrefurl=http%3A%2F%2Fwww.photomacrography.net%2Fforum%2Fviewtopic.php%3Ft%3D18706%26sid%3Dde5d18ac1d275c1aa4dd515785efeda4&h=636&w=950&tbnid=jbcJkJsKA4wdoM%3A&docid=FOszR2n_Owh0WM&ei=dOoFWIexF4W0a8eTm7gJ&tbm=isch&iact=rc&uact=3&dur=1619&page=0&start=0&ndsp=36&ved=0ahUKEwiHu_mlhOTPAhUF2hoKHcfJBpcQMwgjKAUwBQ&bih=913&biw=1680
http://images.google.fr/imgres?imgurl=http%3A%2F%2Fwww.photomacrography.net%2Fforum%2Fuserpix%2F925_turb3_1.jpg&imgrefurl=http%3A%2F%2Fwww.photomacrography.net%2Fforum%2Fviewtopic.php%3Ft%3D18706%26sid%3Dde5d18ac1d275c1aa4dd515785efeda4&h=636&w=950&tbnid=D1RIgKZOH6__NM%3A&docid=FOszR2n_Owh0WM&ei=dOoFWIexF4W0a8eTm7gJ&tbm=isch&iact=rc&uact=3&dur=308&page=0&start=0&ndsp=36&ved=0ahUKEwiHu_mlhOTPAhUF2hoKHcfJBpcQMwgeKAAwAA&bih=913&biw=1680
Hi every one. I appreciate all your aswers. Here we have some new pictures, taken by a collegue of mine (Luis Rolier Lara) who agreed that I posted them on this site.
We guess that yes, it is a Argulidae, maybe of the genus Dolops...
- Badges
- Science topic
- Similar topics
- Biological Science
- Zoology
- Invertebrate Zoology
- Arthropods
- Crustacea