Pleopodal lungs

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File:Porcellio laevis female pleopoda.jpg
The white patches on the first two pairs of pleopods on this specimen of Porcellio laevis identify them as pleopodal lungs.
File:Armadillidium vulgare – pleon, pleopodal lungs.png
Armadillidium vulgare, male pleon, ventral view.
en endopodite
ep epimeron
ex exopodite
lg pleopodal lung
pp pleopod
pr protopodite
pt pleotelson
ur uropod
File:FMIB 47699 Structure of the Breathing Organs of Porcellio scaber.jpg
Pleopodal lungs of Porcellio scaber

Pleopodal lungs are an anatomical feature of terrestrial isopods and a component of their respiratory system. They are ancestrally derived from pleopodal gills, and they facilitate gas exchange on land. They perform a function similar to spiracles in insects.[1][2] Pleopodal lungs are identifiable on woodlice as white patches on the lower five segments (the pleon) on the ventral side (underside). The number of pleopodal lungs varies by species: they may have up to five pairs, or only two pairs as in Porcellio laevis; a minority of species lack pleopodal lungs entirely.[1]

References

  1. ↑ 1.0 1.1 "Woodlice: 'pleopodal lungs'". British Myriapod and Isopod Group. Retrieved 2020-04-24.
  2. ↑ Unwin, Earnest Ewart (1931). "On the structure of the respiratory organs of the terrestrial Isopoda". Papers and Proceedings of the Royal Society of Tasmania: 37–104. ISSN 0080-4703.
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