Uniramia: Hexapoda

Question 1

Two artificial groupings of Hexapoda

Answer 1

Ectognatha

Entognatha

Question 2

Ectognatha

Answer 2

Class Insecta

Question 3

Entognatha

Answer 3

Class Diplura, Collembola, Protura

Question 4

Apomorphic features of the Hexapoda

Answer 4

Monophyly confirmed by unique tagmosis of all members (except entognatha).
Head has six segments
Thorax has three segments
Abdomen has eleven segments primitively, the Collembola has a six segmented abdomen.
The ancestral condition, all abdominal segments have limb prudiments.
Has faceted (compound) eyes

Question 5

Class Protura

Answer 5

Cutaneous breathing
Anamorphic larval development
12 abdominal segments.

Question 6

Anamorphic development

Answer 6

In which a series of similar larval stages are passed through after hatching.

Question 7

Class Collembola

Answer 7

Epimorphic Development
Six abdominal segments
Faceted eyes
Furcula at the tip of the abdomen

Question 8

Epimorphic development

Answer 8

A form of development in segmented animals where segmentation takes place before hatching.

Question 9

Class Diplura

Answer 9

Thorax poorly developed
Epimorphic development
Ten abdominal segments each with a style and eversible vesicle (I.e. abdominal appendages)
Cerci at the end of abdomen