Armadillidiidae

From Wikipedia, the free encyclopedia - View original article

Armadillidiidae
Armadillidium vulgare
Armadillidium vulgare in its defensive posture
Scientific classification
Kingdom:Animalia
Phylum:Arthropoda
Subphylum:Crustacea
Class:Malacostraca
Order:Isopoda
Suborder:Oniscidea
Family:Armadillidiidae
Brandt, 1833
 
Jump to: navigation, search
Armadillidiidae
Armadillidium vulgare
Armadillidium vulgare in its defensive posture
Scientific classification
Kingdom:Animalia
Phylum:Arthropoda
Subphylum:Crustacea
Class:Malacostraca
Order:Isopoda
Suborder:Oniscidea
Family:Armadillidiidae
Brandt, 1833

The Armadillidiidae are a family of woodlice, a terrestrial crustacean group in the order Isopoda. Unlike members of other woodlouse families, members of this family can roll into a ball, an ability they share with the outwardly similar but unrelated pill millipedes and other animals. It is this ability which gives woodlice in this family their common name of pill bugs[1] or roly polies.[2] The best known species in the family is Armadillidium vulgare, the common pill bug.

Ecology and behaviour[edit]

Woodlice in the family Armadillidiidae are able to form their bodies into a ball shape, in a process known as conglobation. This behaviour is shared with pill millipedes (which are often confused with pill bugs[3]), armadillos and cuckoo wasps.[4] It may be triggered by stimuli such as vibrations or pressure, and is a key defence against predation; it may also reduce respiratory water losses.[5]

Relationships with people[edit]

Pill bugs can be considered pests of homes and gardens.[1][6] They are, however, cherished among children, who enjoy keeping them as pets. [7] Keeping a pet pill bug requires a very moist habitat with a lot of light.[8] They can live for about two to three years.[7]

Owners of pet tarantulas sometimes keep pill bugs as cage cleaners in the same habitat. The pill bugs eat feces, mold, and leftovers.[8]

Classification[edit]

The family Armadillidiidae is differentiated from other woodlouse families by the two-segmented nature of the antennal flagellum, by the form of the uropods, and by the ability to roll into a ball, or conglobate.[9]

Within the family Armadillididae, fifteen genera are currently recognised:[10]

  • Alloschizidium
  • Armadillidium
  • Ballodillium
  • Cristarmadillidium
  • Cyphodillidium
  • Echinarmadillidium
  • Eleoniscus
  • Eluma
  • Paraschizidium
  • Paxodillidium
  • Platanosphaera
  • Schizidium
  • Trichodillidium
  • Troglarmadillidium
  • Typhlarmadillidium

References[edit]

  1. ^ a b Gordon Gordh & David H. Headrick (2011). "Common pillbug". A Dictionary of Entomology (2nd ed.). CAB International. p. 343. ISBN 9781845935429. 
  2. ^ Kenn Kaufman & Kimberly Kaufman (2012). Kaufman Field Guide to Nature of New England. Houghton Mifflin Harcourt. p. 364. ISBN 9780618456970. 
  3. ^ "Pill millipede (Glomeris marginata)". ARKive. Retrieved June 21, 2007. 
  4. ^ Edward M. Barrows (2001). Animal behavior desk reference: a dictionary of animal behavior, ecology, and evolution (2nd ed.). CRC Press. p. 142. ISBN 978-0-8493-2005-7. 
  5. ^ Jacob T. Smigel & Allen G. Gibbs (2008). "Conglobation in the pill bug, Armadillidium vulgare, as a water conservation mechanism" (PDF). Journal of Insect Science 8 (44): 1–9. doi:10.1673/031.008.4401. PMID 20233103. 
  6. ^ David V. Alford (2012). "Woodlice". Pests of Ornamental Trees, Shrubs and Flowers (2nd ed.). Manson Publishing. pp. 434–435. ISBN 9781840761627. 
  7. ^ a b Sheryl Smith-Rogers (October 2009). "Wild Thing: Roly-Poly Pillbugs". TPW Magazine. Retrieved July 10, 2010. 
  8. ^ a b Stanley A. Schultz & Marguerite J. Schultz (2009). The Tarantula Keeper's Guide: Comprehensive Information on Care, Housing, and Feeding. Barron's Educational Series. pp. 181–183. ISBN 978-0-7641-3885-0. 
  9. ^ P. J. Hayward & John Stanley Ryland (1995). "Crustaceans". Handbook of the marine fauna of north-west Europe. Oxford University Press. pp. 289–461. ISBN 978-0-19-854055-7. 
  10. ^ Marilyn Schotte (2012). "Armadillidiidae". In M. Schotte, C. B. Boyko, N. L. Bruce, G. C. B. Poore, S. Taiti & G. D. F. Wilson. World Marine, Freshwater and Terrestrial Isopod Crustaceans database. World Register of Marine Species. Retrieved September 26, 2012. 

External links[edit]