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Class Crustacea

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All members of this group bear mandibles on the third head segment that are ... segments, thoracic with 8 segments, abdomen with 6-7 segments plus a telson ... – PowerPoint PPT presentation

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Title: Class Crustacea


1
Subphylum Mandibulata
  • Class Crustacea

2
Subphylum Mandibulata
  • All members of this group bear mandibles on the
    third head segment that are modified for feeding
  • Taxonomic Summary
  • Phylum Arthropoda
  • Subphylum Mandibulata
  • Class Myriapoda
  • Class Insecta
  • Class Crustacea

3
Class Crustacea
  • Defining Characteristics
  • Crustacean Characteristics

4
Crustacean Segments Appendages
  • The crustacean head consists of 5 segments fused
    tightly together
  • These segments bear five paired appendages
  • 2 pairs of antennae
  • 1 pair of mandibles
  • 2 pairs of maxillae

5
Crustacean Segments Appendages
  • Following segment is the thorax, which can have a
    variable amount of appendages
  • The abdomen may or may not have appendages

6
Taxonomic Summary
  • Class Crustacea
  • Subclass Cirripedia
  • Subclass Copepoda
  • Subclass Malacostraca
  • Order Stomatopoda
  • Order Euphausiacea
  • Order Isopoda
  • Order Amphipoda
  • Order Decapoda

7
Subclass Cirripedia
  • Defining Characteristics
  • All species are highly modified for attachment to
    hard substrates
  • Thoracic limbs are modified as filtering cirri

8
Havent I Seen You Before
  • Thought to be molluscs by early naturalists
  • Possess a shell that is secreted by mantle
    tissue
  • What makes barnacles members of the phylum
    Arthropoda?

9
Barnacle Anatomy
  • Have a reduced head and 6 segmented thorax
  • Thorax - six pairs of feather like appendages
    which are used for suspension feeding

10
Is that a roll of quarters, or are you just happy
to see me?
11
Subclass Copepoda
  • Defining Characteristics
  • Loss of abdominal appendages
  • Abundant in the plankton and benthic communities
    but due to small size escape notice

Harpacticoid
12
Cows of the Sea
13
Subclass Malacostraca
  • Defining Characteristics
  • The head has 5 fused segments, thoracic with 8
    segments, abdomen with 6-7 segments plus a telson
  • Appendages on the 6th abdominal segment are
    flattened to form uropods
  • Contains nearly 75 of all crustaceans

14
Malacostraca Characteristics
15
Order Stomatopoda
16
Order Euphausiacea
  • Krill, a small group of only 85 species
  • Have 8 pairs of walking feet instead of 5 like
    most decapods

17
Order Isopoda
18
Order Amphipoda
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