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Subphylum Crustacea lab notes

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2021/2022 Written for academic year
Institution College Of Coastal Georgia
Course Zoology (BIOL3270)
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Describes structures to be identified and taxonomic classifications of Crustaceans ranging from giant Japanese spider crabs to microscopic copepods. Includes very short section on crustacea larval development.

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PHYLUM ARTHROPODA
SUBPHYLUM CRUSTACEA


FEATURES
 Head with five pairs of appendages (including 2 pairs of antennae)
 Biramous = whole leg
o Upper leg = exopod (used for manipulating food)
o Lower leg = endopod (contains spiny projections for manipulating food)
o Protopod = base of the appendage where the branches unite




Class Malacostraca

FEATURES
 Thorax (8)
 Abdomen (6-7 + telson)
 6th abdominal segment bears uropods



Order Decapoda
First three pairs of thoracic appendages modified as maxillipeds

Southern Crayfish
EXTERNAL ANATOMY
 Head
 Thorax
 Abdomen
 Telson
 Uropod
 Rostrum (snout)
 1st antennae (homologous to antennae of other mandibulate classes)
 2nd antennae (homologous to Arachnid chelicera)
 Mandibles
 Maxilla (1&2)
 Maxillipeds (1-3)
 Legs 1-5 (peropods)
 Pleopodia (1-5)
 Eyes

, INTERNAL ANATOMY
 Abdomen
o intestine
o dorsal abdominal artery
o muscles
 Cephalothorax
o Digestive gland (hepatopancreas)
o Gills
o Heart
o Cardiac stomach
o Pyloric stomach
o Green gland (works like a kidney)


Fiddler crab
 Genus Uca
 Family Ocypodidae
 Functions of chilipeds?


Various Crabs
IDENTIFY
 Chiliped
 Carapace
 Abdomen
 Compound eye
 Male: Washington monument; Female: Capitol building


Various shrimp
IDENTIFY
 Carapace
 Abdomen
 Mandibles
 Compound eye
 Maxillipeds
 Pereopods
 Pleopods
 Telson
 Uropods




Order Stomatopoda (mantis shrimp)
FEATURES

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December 23, 2021
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2021/2022
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David stasek
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