Home page

Woodlice

Tree lupins

Conditions of use

Guest book

wlice1b.gif (1843 bytes)

SEM Photographs

Photographs are the property of G.J.McKenzie and may not be used for commercial purposes without my prior permission.

These photographs have been taken using a scanning electron microscope (SEM). This has allowed a much greater depth of field than would be possible with a normal camera and macro lens. The woodlice have been dried and then coated with a thin layer of gold before being placed in the scanning electron microscope. The high vacuum in the SEM has caused some slight damage to the specimen in the first photograph (the darker shading on the right hand side has been caused by the partial collapse of the carapace.

The approximate magnification is given below each photograph. Click on photographs to get an enlarged view.

head - dorsal
50x
1. Dorsal view of head and first thoracic segment. Notice the "three lobed head" structure which identifies this as being Porcellio scaber. The right hand lobe has been damaged during preparation.
Head - lateral
50x
2. Lateral view of head showing antenna and compound eye. The maxillipeds are visible on the lower surface of the head.
mouthparts
50x
3. Ventral view of head showing maxillipeds (the large mouth part structures) and base of antennae.
Antenna - tip
1000x
4. Tip of antenna.
Eye - lateral
200x
5.

Lateral view of compound eye

 

Eye - dorsal
200x
6. Dorsal view of compound eye, made of 22 simple eyes (ocelli)

50x
7. Dorsal view of plates (tergites) in the thoracic region. The overlapping structure of these plates gives flexibility.
Carapace
2000x
8. Dorsal view of surface of the carapace of thorax - this appears to show some wax like fibres, suggesting that  woodlice do have a very thin waxy cuticle.
Uropods
50x
9. Ventral view showing the uropods (tail like structures), the inner pair are called endopods and the outer pair are called exopods.
The plate like structures directly above the uropods are the pleopods - the fartherest pair of pleopods )not visible here) contain the primitive lungs.
Leg - tip
200x
10.

Tip of pereopod (leg)

 

Photographs are the property of G.J.McKenzie and may not be used for commercial purposes without my prior permission.

 

 

Home page

Woodlice

Tree lupins

Conditions of use

Guest book

This page hosted by Get your own Free Home Page