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

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Presentation transcript:

Angel Sharks

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

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

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

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

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

Feeding Behavior watch?v=m2eX14h wTTk Prey: Teleost fishes Cephalopods Crustaceans Smaller Elasmobranchs, e.g. (Horn Shark, Heterodontus francisci) Feed on benthic and near- bottom organisms Ambush predator Rely on camouflage

Locomotion and camouflaging behavior

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