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Angel Sharks

Angel Sharks. OK, Family Squatinidae. Class: Chondrichthyes Subclass: Elasmobranchii Order: Squatiniformes Family: Squatinidae Genus: Squatina 17 species. Squatina tergocellata. Characteristics. Dorso-ventrally flattened body

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Angel Sharks

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  1. Angel Sharks

  2. OK, Family Squatinidae Class: Chondrichthyes Subclass: Elasmobranchii Order: Squatiniformes Family: Squatinidae Genus:Squatina 17 species Squatina tergocellata

  3. Characteristics • Dorso-ventrally flattened body • Large Pectorals not attached to head • No Anal fin, 2 dorsal fins • Hypocercal tail with large lower lobe • Dorsal eyes, • Large dorsal spiracles • Terminal mouth with barbels S. dumeril

  4. Other Characteristics Dermal denticles in Squatina guggenheim Large Labial Cartilages, Conical, pointed teeth Ex. Squatina californica

  5. Distribution of genus Squatina • Found worldwide on continental shelves • Subtropical-warm temperate seas • Found from 0-500 m depth, bottom dwelling

  6. Feeding Morphology • Wide jaws produce large suction, • Pointed teeth grip prey

  7. Feeding Behavior • Feed on benthic and near- bottom organisms • Ambush predator • Rely on camouflage • http://youtube.com/watch?v=m2eX14hwTTk • Prey: • Teleost fishes • Cephalopods • Crustaceans • Smaller Elasmobranchs, e.g. • (Horn Shark, Heterodontus francisci)

  8. Locomotion and camouflaging behavior http://youtube.com/watch?v=CasWxx_OFs8

  9. Phylogeny • Source of debate • Known from Upper Jurassic • Morphologically placed in sister group with Squaliformes, Raijidae (Skates), Pristiophoridae (sawfishes) • Molecular techniques indicate Pristiophoridae basal to Squaliformes • Earlier fossils of Squatiniformes may indicate basal lineage • Requires more study D. Squatina africana E. Pristiophorus cirratus

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