BIOL 467L Lab Practical #3

Hexapoda

3 thoracic segments, each with 1 pair of legs (“six feet”)

Entognatha

Mouthparts enclosed within head capsule ('“inside jaw”)

Entognathous

Mouthparts retraced within the head

Apterygota

No wings ever (“without wings”)

Pterygota

Wings present or secondarily lost (“winged”)

Palaeoptera

Cannot fold wings over abdomen at rest (“ancient wing”)

Neoptera

Can fold wings flavor over abdomen

Orders of Entognatha

Protura, collembola, diplura

Characters of Entognatha

All ametabolous, primarily soil/litter dwelling, wingless, MP’s retracted

Protura

Absent eyes and antennae, conical head, front legs project forward beyond head

Diplura

Absent eyes, long/beaded antennae, 1 segmented tarsi, cerci filiform or forcep like

Collembola

wingless, forked springtail (furcula) near end of abdomen, peg-like collophore