Isopoda - Woodlice, aquatic species, etc.

Crustacea
  Malacostraca, crabs, shrimps, woodlice, lobsters
  Mystacocarida
  Ostracoda seed shrimps
  Branchiopoda, water fleas
  Cirripedia, barnacles
  Cephalocardia
  Branchiura
  Copepoda, Copepoda, cyclops
  Tantulocardia
  Remipedia

species list - main woodlice page - Porcellio laevis - Porcellionides cingendus - Porcellio scaber - Androniscus dentiger, the rosy woodlouse - Buddelundiella cataractae - Platyarthrus hoffmannseggi, the ant woodlouse

Porcellio laevis (below)is a rather rare species which is a smooth and glossy brown-grey. It reaches 18 mm when fully grown. Its eyes consist of a number of black ocelli. It is found in gardens and compost heaps in eastern and southern England, and around Dublin in Ireland. There are no records from Wales or Scotland.

Porcellio laevis, woodlouse

Porcellionides cingendus

Porcellionides cingendus

Porcellionides cingendus is creamy-yellow to reddish brown mottled with brown and dark grey in colour, and has a ridge running across each of the 7 segments after the head. It reaches 7 mm when fully grown, and runs very fast when disturbed.

It is found in grassland, scrub, open woodland, in tussocks and leaf litter, mainly near the coast.

 

woodlouse

Porcellio scaber

Left is Porcellio scaber, it can tolerate drier places, and is slate grey, but nearer the coast orange, cream, black and red speckled morphs have been found. It is 17 mm long and 8.5 mm wide when fully grown, and is very common in the U. K. and is also found in Western Europe, Iceland, South America, and South Africa.

It is covered in tubercles (bumps), and its exoskeleton is not shiny at all. This one has just moulted. Unlike insects they do not moult their whole exoskeleton at once, but in two parts. They can moult up to 25 times. It often enters houses

Androniscus dentiger, the rosy woodlouse

Androniscus dentiger right has large eyes, long antennae, and is pink, red or white with 2 long yellow lines running down its body. When fully grown it reaches 6 mm long.

It is usually found in caves and mines or among garden rubble and quarries. It moves quickly when disturbed. As well as the U. K. it is found in Germany, Holland, Finland, what used to be Yugoslavia, North Africa and Canada.

The 2 on the right were found when I moved a very large plant pot that had been in a shady, damp spot.

Return to main woodlouse page

the Rosy woodlouse, Androniscus dentiger Androniscus dentiger, rosy woodlouse
Buddelundiella cataractae, woodlouse

Buddelundiella cataractae

Left is the head of Buddelundiella cataractae, and right is a drawing showing it in the characteristic curled up posture.

It is a small woodlouse only reaching 3 mm when fully grown. Its body is white or buff and it has a pair of 3 black ocelli. It can roll up into a ball to resemble a grain of sand making it very difficult to see, and is very rare.

It is found in coastal shingle banks and under stones. As well as the U. K. it is found around the eastern Mediterranean, Finland, Hungary and Georgia.

Buddelundiella cateractae, woodlouse
Platyarthrus hoffmanseggi, ant woodlouse

Platyarthrus hoffmannseggi, the ant woodlouse

Left is Platyarthrus hoffmannseggi, the ant woodlouse. It is blind, white and found in ants nests in Wales and southern England, it is less common in northern England, and absent from Scotland, but it is fairly widespread throughout Europe. In Ireland it is recorded only in the south east.

It is less than 4 mm long. Sometimes the contents of its gut can be seen through the cuticle.

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