1. Tardigrade
  2. Question
  3. Biology
  4. An aquatic living fossil with ancient origin and many primitive characters, which respires through book gills, is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. An aquatic living fossil with ancient origin and many primitive characters, which respires through book gills, is

AMUAMU 2012Animal Kingdom

Solution:

Limulus or king crab is a large sized marine arthropod which represents a specialized group of chelicerate animals. It has remained almost unchanged since the last $200$ million years. It is therefore, also called living fossil. Book gills serve the function of respiratory organs in Limulus.