Hex Mayflies
Hexagenia limbata
The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
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This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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Arthropod Class Crustacea-Malacostraca (Crayfish, Scuds, and Sowbugs)
Crustaceans are classified as one of those inconvenient intermediate taxonomic levels, the subphylum. The varieties of interest to trout anglers are in the class Malacostraca.
It contains the orders of scuds (Amphipoda), sowbugs (Isopoda), opossum or mysis shrimp (Mysida), and crayish (Decapoda). Crayfish and scuds are both extremely important trout prey.
It contains the orders of scuds (Amphipoda), sowbugs (Isopoda), opossum or mysis shrimp (Mysida), and crayish (Decapoda). Crayfish and scuds are both extremely important trout prey.
Specimens of the Arthropod Class Crustacea-Malacostraca
1 Male Adult
5 Adults
1 Juvenile
1 Streamside Picture of Crustacea-Malacostraca Arthropods:
I took this picture of a scud from above the water's surface in a very shallow, clear, tiny bit of water at the margin of a little spring pond.
In this picture: Arthropod Order Amphipoda (Scud).
10 Underwater Pictures of Crustacea-Malacostraca Arthropods:
A crayfish chews on a Hexagenia limbata nymph shortly after a small Hex emergence. I didn't catch any fish, but playing around with my flashlight and camera in the rocks proved productive.
In this picture: Mayfly Species Hexagenia limbata (Hex) and Arthropod Order Decapoda (Crayfish).
A water boatman and a scud are visible in this picture. Can you find them?
In this picture: Arthropod Order Amphipoda (Scud) and True Bug Family Corixidae (Water Boatman).
A crayfish munches on an unidentified white thing.
In this picture: Arthropod Order Decapoda (Crayfish).
A large crayfish lurks under a log which is home to several mayfly nymphs and caddisfly larvae.
A big crayfish lurks under a log.
In this picture: Arthropod Order Decapoda (Crayfish).
Discussions of Crustacea-Malacostraca
Help to get some specimens of the isopod Caecidotea communis
11 replies
Last reply on Mar 29, 2013 by Leonardo
My name is Leonardo García, I am a biologist intern in the National Autonomous University of Mexico and I'm doing my thesis with title "Morphological variation in the genus Caecidotea isopods (Packard, 1871) (Crustacea: Peracarida: Isopoda) of Mexico." Inside the National Collection of Crustacean, Biology Institute (UNAM).
I was wondering if somebody can help me to get some specimens of the specie Caecidotea communis and send them to me to continue with my thesis work. It would help and enrich my study.
Thanks for your attention
Leo
I was wondering if somebody can help me to get some specimens of the specie Caecidotea communis and send them to me to continue with my thesis work. It would help and enrich my study.
Thanks for your attention
Leo
Some Photos for Fred
4 replies
Last reply on Jan 28, 2011 by FredH
Do these look like the bug you ask about in your post?
Pakistani amphipods
Last reply on Apr 2, 2009 by Halabano
Hi! i m working on Pakistani amphipods. i want to be intouch with scientists & students working on amphipods taxonomy & ecology
Taxonomy
2 replies
Posted by DMM on Nov 29, 2006
Last reply on Dec 1, 2006 by DMM
Malacostraca is a class but Crustacea is a subphylum
Start a Discussion of Crustacea-Malacostraca
Arthropod Class Crustacea-Malacostraca (Crayfish, Scuds, and Sowbugs)
Taxonomy
Order in Crustacea-Malacostraca
AmphipodaScuds
4
18
DecapodaCrayfish
2
15
IsopodaSowbugs
2
6
MysidaMysis Shrimp
0
0
1 order (Order Mysida) isn't included.