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Animal Kingdom

Question
CBSEENBI11024947
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Which of the following does not come under the Class Mammals?

  • Flying fox

  • Hedgehog

  • Manatee

  • Lamprey

Solution

D.

Lamprey

Lamprey (or Petromyzon) belongs to class cyclostomata. The lamprey has about 1m long greenish brown, cylindrical body with smooth, scaleless, slimy skin; anterior circular, jawless mouth; a single dorsal naris; seven pairs of circular gill slits; 2 dorsal tins and a tail tin. It's life cycle includes two quite different phases. The larval phase (called ammocoete) is a fresh water sedentary, filter feeding and microphagus creature reminiscent of the lancet. The fish like adult lives in the sea and is parasitic on fishes.

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