Amynthas

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Genus of annelid worms

title: "Amynthas" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["haplotaxida", "annelid-genera", "megascolecidae"] description: "Genus of annelid worms" topic_path: "general/haplotaxida" source: "https://en.wikipedia.org/wiki/Amynthas" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of annelid worms ::

| image = Amynthas aspergillum imported from iNaturalist photo 208135275 on 21 December 2022.jpg | image_caption = Amynthas aspergillum (Taiwan) | taxon = Amynthas | authority = Kinberg, 1867 ::figure[src="https://upload.wikimedia.org/wikipedia/commons/5/5f/Amynthas_agrestis_97113364.gif" caption="Jumping behaviour."] ::

Amynthas is a genus of earthworms in the family Megascolecidae. They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed. The genus is native to East Asia, but they are invasive in many areas of the United States. They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry.

Appearance

Amynthas species can be differentiated from other earthworms by their clitellum, which is pale, annular, is close to the head, and lies flat against the body. They vary in size between 3.8 and.

Life cycle

Amynthas species' faster reproduction rate and their ability to reproduce asexually (parthenogenesis) has contributed to their spread into the United States. The worms reach maturity in 60 days, which allows them to have two hatches per year. Eggs are wrapped in small cocoons, which overwinter while the adults die off at the first freeze each year. The young then emerge the next spring.

Species

  • Amynthas agrestis (Goto and Hatai, 1899)
  • Amynthas alexandri (Beddard, 1900)
  • Amynthas assimilis (Hong & Kim, 2002)
  • Amynthas baikmudongensis (Hong, 2017)
  • Amynthas borealis (Panha & Bantaowong, 2011)
  • Amynthas comptus (Gates, 1932)
  • Amynthas defecta (Gates, 1930)
  • Amynthas dorualis
  • Amynthas exiguus (Gates, 1930)
  • Amynthas fucosus (Gates, 1933)
  • Amynthas gracilis (Kinberg, 1867)
  • Amynthas hilgendorfi (Michaelsen, 1892)
  • Amynthas hupbonensis (Stephenson, 1931)
  • Amynthas japonicus (Horst, 1883)
  • Amynthas kinmenensis
  • Amynthas longicauliculatus (Gates, 1931)
  • Amynthas luridus (Shen, Chang, & Chih, 2019)
  • Amynthas mekongianus (Cognetti, 1922)
  • Amynthas minimus
  • Amynthas mirifius
  • Amynthas moakensis
  • Amynthas morrisi (Beddard, 1892)
  • Amynthas mujuensis
  • Amynthas obsoletus
  • Amynthas papulosus (Rosa, 1896)
  • Amynthas phatubensis (Panha & Bantaowong, 2011)
  • Amynthas polyglandularis
  • Amynthas pulvinus
  • Amynthas pyeongchangensis (Hong & James, 2009)
  • Amynthas ruiyenensis (Shen, Chang, & Chih, 2019)
  • Amynthas sangumburi
  • Amynthas siam (Blakemore, 2011)
  • Amynthas srinan (Panha & Bantaowong, 2011)
  • Amynthas taiwumontis
  • Amynthas tessellatus
  • Amynthas tokioensis (Beddard, 1892)
  • Amynthas tontong (Panha & Bantaowong, 2011)
  • Amynthas wuhumontis
  • Amynthas wujhouensis

References

References

  1. Bantaowong, U.. (2011). "New earthworm species of the genus ''Amynthas'' Kinberg, 1867 from Thailand (Clitellata, Oligochaeta, Megascolecidae)". ZooKeys.
  2. "Asian Jumping Worms".
  3. "Jumping worm (Amynthas species) {{!}} Minnesota DNR".
  4. Silver, Jennie. "“Jumping Worm” – Amynthas spp.".
  5. "details".
  6. "Amynthas Worms in Maine : Maine DACF".
  7. "Jumping worms".
  8. ''Wisconsin DNR Forest Health.'' "[https://dnr.wi.gov/topic/invasives/documents/JumpingWormFactSheet.pdf Jumping Worms (''Amynthas spp.'') Fact Sheet]". Updated April 2015. Accessed Dec 22 2022.
  9. "Jumping Worms".
  10. "Jumping Worm (Amynthas spp.)".
  11. (2021-05-14). "Invasive Asian Jumping Earthworms".
  12. weeks. (2021-07-28). "Jumping/Crazy/Snake Worms – Amynthas spp.".
  13. Shen, H.-P.. (2019). "Two new earthworm species of the genus ''Amynthas'' (Oligochaeta: Megascolecidae) from central Taiwan, with comments on some recent species assignments in ''Amynthas'' and ''Metaphire''". Zootaxa.

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haplotaxidaannelid-generamegascolecidae