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Subphylum Mandibulata

Subphylum Mandibulata. Class Crustacea. 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. Class Crustacea.

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Subphylum Mandibulata

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  1. Subphylum Mandibulata Class Crustacea Subphylum Mandibulata

  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 Subphylum Mandibulata

  3. Class Crustacea • Defining Characteristics • Crustacean Characteristics Subphylum Mandibulata

  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 Subphylum Mandibulata

  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 Subphylum Mandibulata

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

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

  8. Haven’t 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? Subphylum Mandibulata

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

  10. Is that a roll of quarters, or are you just happy to see me? Subphylum Mandibulata

  11. Subclass Copepoda • Defining Characteristics • Loss of abdominal appendages • Abundant in the plankton and benthic communities; but due to small size escape notice Harpacticoid Subphylum Mandibulata

  12. Calanoid Cyclopoid Cows of the Sea Subphylum Mandibulata

  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 Subphylum Mandibulata

  14. Malacostraca Characteristics Subphylum Mandibulata

  15. Order Stomatopoda Subphylum Mandibulata

  16. Order Euphausiacea • Krill, a small group of only 85 species • Have 8 pairs of walking feet instead of 5 like most decapods Subphylum Mandibulata

  17. Order Isopoda Subphylum Mandibulata

  18. Order Amphipoda Subphylum Mandibulata

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