Top Qs
Timeline
Chat
Perspective
Amynthas
Genus of annelid worms From Wikipedia, the free encyclopedia
Remove ads
Amynthas is a genus of earthworms in the family Megascolecidae.[1] They are known as jumping worms, snake worms, or crazy worms because of their erratic thrashing behaviour when disturbed.[2][3][4][5] The genus is native to East Asia, but they are invasive in many areas of the United States.[3][5][6] They are a matter of concern in many states, as they disrupt the native forest ecology by affecting soil structure and chemistry.[3][7]

Remove ads
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.[3][8] They vary in size between 3.8 and 20.3 cm (1.5 and 8.0 in).[8][9]
Life cycle
Amynthas species' faster reproduction rate and their ability to reproduce asexually (parthenogenesis) has contributed to their spread into the United States.[10] The worms reach maturity in 60 days, which allows them to have two hatches per year.[10] Eggs are wrapped in small cocoons, which overwinter while the adults die off at the first freeze each year.[11] The young then emerge the next spring.[12]
Remove ads
Species
- Amynthas agrestis (Goto and Hatai, 1899)
- Amynthas alexandri (Beddard, 1900)
- Amynthas assimilis (Hong & Kim, 2002)
- 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)[13]
- 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 ruiyenensis (Shen, Chang, & Chih, 2019)[13]
- Amynthas sangumburi
- Amynthas siam (Blakemore, 2011)
- Amynthas srinan (Panha & Bantaowong, 2011)
- Amynthas taiwumontis
- Amynthas tessellatus
- Amynthas tokioensis (Beddard, 1892)[13]
- Amynthas tontong (Panha & Bantaowong, 2011)
- Amynthas wuhumontis
- Amynthas wujhouensis
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads