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Subphylum Mandibulata

Subphylum Mandibulata

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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