Thursday, October 08, 2009

The one with two pairs of legs per segment

Encountered a giant millipede marching along the wooden railing one morning. It was at a perfect height for me to photograph it and get lots of details with my macro lens. My subject was also covered in dew which made it all the more interesting.
Millipedes have two pairs of legs per segment (except for the first segment behind the head which does not have any appendages at all, and the next few which only have one pair of legs). Each segment that has two pairs of legs is a result of two single segments fused together as one.
The head contains a pair of sensory organs known as the Tömösváry organs. These are found just posterior and lateral to the antennae, and are shaped as small and oval rings at the base of the antennae. They are probably used to measure the humidity in the surroundings. The Millipede's eyes consist of a number of simple flat lensed ocelli arranged in a group on the front/side of the head.


Uncle Phil said...

We admire your minuscular observation in nature with such details,
Phil & Jo

Shirls said...

Thanks Phil & Jo!