BIOL 111 Lecture Notes - Lecture 12: Millipede, Isopoda, Centipede

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: Rudiger Krahe

Document Summary

Hexapods are mainly insects hexapods have three body regions: head contains antennae and mandibles, thorax contains 3 pairs of walking legs and may contain wings, abdomen does not contain any appendages. Wings have evolved around 320 mya a number of times each type of wing evolution is analogous (i. e. between mammal wings, insect wings and bird wings) Most are marine, although few are terrestrial and freshwater their body is divided into head, thorax (cephalothorax) and abdomen they have highly modified appendages on each segment. Many are zooplankton that eat phytoplankton and are moved by the tides e. g. crabs, daphnia, barnacles, isopods, crayfish, shrimp parasitic isopods will eats the tongue of the host fish and will act as tongue. Myriapods they have two major body divisions: head and trunk divided into two groups: centipedes (chilopoda) one pair of legs per segment carnivorous, millipedes (diplopoda) two pairs of legs per segment herbivorous, detritivorous.