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Arthropod Class Crustacea-Malacostraca (Crayfish, Scuds, and Sowbugs)

Taxonomic Navigation -?-
Kingdom Animalia (Animals)
» Phylum Arthropoda (Arthropods)
» Class Crustacea-Malacostraca (Crayfish, Scuds, and Sowbugs)
Order in Crustacea-MalacostracaNumber of SpecimensNumber of Pictures
AmphipodaScuds418
DecapodaCrayfish215
IsopodaSowbugs26
Common Name
Pictures Below
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), and crayish (Decapoda). Crayfish and scuds are both extremely important trout prey.

8 Arthropod Specimens in the Class Crustacea-Malacostraca:

Specimen Page:12
Amphipoda (Scuds) Scud AdultAmphipoda (Scuds) Arthropod AdultView 7 Pictures
Region: Northeast
Collected Mar 29, 2006
Added Apr 7, 2006
Cambaridae Crayfish AdultCambaridae  Crayfish AdultView 4 Pictures
Region: Upper Midwest
Collected Jan 31, 2004
Added Jan 25, 2006
Caecidotea (Cress Bugs) Sowbug AdultCaecidotea (Cress Bugs) Sowbug AdultView 3 Pictures
Region: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Specimen Page:12

1 Streamside Picture of Crustacea-Malacostraca Arthropods:

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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.
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 (Scuds).
RegionUpper Midwest
Date TakenMay 28, 2005
Date AddedFeb 8, 2006

10 Underwater Pictures of Crustacea-Malacostraca Arthropods:

Underwater Photo Page:12
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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.
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: Arthropod Order Decapoda (Crayfish) and Mayfly Species Hexagenia limbata (Hex).
RegionUpper Midwest
Date TakenJun 14, 2006
Date AddedJun 30, 2006
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A water boatman and a scud are visible in this picture.  Can you find them?
A water boatman and a scud are visible in this picture. Can you find them?

In this picture: True Bug Family Corixidae (Water Boatmen) and Arthropod Order Amphipoda (Scuds).
RegionUpper Midwest
Date TakenApr 13, 2004
Date AddedJan 25, 2006
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RegionUpper Midwest
Date TakenMar 24, 2004
Date AddedJan 25, 2006
Underwater Photo Page:12

Recent Discussions of Crustacea-Malacostraca

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
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