European Pillbugs

Armadillidiidae

Classification

Pronunciation

How to pronounce Armadillidiidae: //ˌɑːrmədɪˈlɪdiiːaɪ//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Images

Armadillidium nasatum 01 by Ilona Loser. Used under a CC BY-SA 4.0 license.
Armadillidium nasatum by Wilfred Mark Webb & Charles Sillem. Used under a CC0 license.
Invertebrate Pillbug Armadillidium nasatum by Twosistersinthewild. Used under a CC BY-SA 4.0 license.
Armadillidium nasatum P1020345a by 
xpda. Used under a CC BY-SA 4.0 license.
Armadillidium nasatum 04 by Ilona Loser. Used under a CC BY-SA 4.0 license.
Armadillidium nasatum P1020346a by 
xpda. Used under a CC BY-SA 4.0 license.

Summary

The family Armadillidiidae consists of terrestrial crustaceans known for their ability to roll into a ball, primarily found in damp environments, feeding on decomposing plant matter and serving important ecological roles as detritivores.

Physical Characteristics

Uropods shorter than the last abdominal segment; segmented body structure with overlapping plates called tergites.

Identification Tips

Armadillidium species have triangular- or trapezoidal-shaped telsons, while American species of Armadillidae have hourglass-shaped telsons.

Habitat

Terrestrial environments, often found in decaying plant matter in damp areas.

Distribution

Primarily native to the Western Palaeactic; three species introduced worldwide, with significant populations in North America.

Diet

Largely made up of decaying plant matter; may also consume living plants, decaying animal flesh, or feces.

Ecosystem Role

Detritivores that contribute to soil organic matter retention and carbon balance.

Economic Impact

Can be serious pests in agriculture, damaging crops such as corn, beans, soybeans, and strawberries. Have been reported as house pests.

Cultural Significance

Commonly known as pill bugs or roly polies; also referred to as slaters, potato bugs, butchy boys, and doodle bugs.

Evolution

Conglobation is a key evolutionary adaptation shared with unrelated animals like pill millipedes and armadillos, likely evolved as a defense mechanism.

Misconceptions

Often confused with pill millipedes, which are unrelated.

Tags

  • Armadillidiidae
  • Pill bugs
  • Roly polies
  • Isopoda