Editing Ice worm (section)

== Species ==

The genus contains 77 [[species]]. They are the following:<ref name="schmelz"/><ref name="schmelz2"/><ref name="shen2012">{{cite journal|author=Qi Shen, Jing Chen, & Zhicai Xie|year=2012|title=''Mesenchytraeus monodiverticulus'' sp. nov. (Annelida: Clitellata: Enchytraeidae) from Changbai Mountain, with a key to ''Mesenchytraeus'' with enlarged chaetae|journal=Proceedings of the Biological Society of Washington |volume=125|issue=3|pages=215&ndash;227|doi=10.2988/12-08.1|s2cid=84234028}}</ref>

{{div col|colwidth=30em}}
*''[[Mesenchytraeus affinis]]'' Michaelsen, 1901
*''[[Mesenchytraeus altus]]'' Welch, 1917 
*''[[Mesenchytraeus americanus]]'' Bell, 1942 
*''[[Mesenchytraeus anisodiverticulus]]'' Shen, Chen & Xie, 2012 
*''[[Mesenchytraeus antaeus]]'' Rota & Brinkhurst, 2000 
*''[[Mesenchytraeus arcticus]]'' Bell, 1962 
*''[[Mesenchytraeus argentatus]]'' Nurminen, 1973b 
*''[[Mesenchytraeus armatus]]'' (Levinsen, 1884) 
:*''[[Mesenchytraeus armatus armatus]]'' (Levinsen, 1884) 
:*''[[Mesenchytraeus armatus kananaskis]]'' Dash, 1970 
*''[[Mesenchytraeus asiaticus]]'' Eisen, 1904 
*''[[Mesenchytraeus atriaphorus]]'' Altman, 1936 
*''[[Mesenchytraeus beringensis]]'' Eisen, 1904 
*''[[Mesenchytraeus beumeri]]'' (Michaelsen, 1886b) 
*''[[Mesenchytraeus bungei]]'' Michaelsen, 1901 
*''[[Mesenchytraeus cejkai]]'' Cernosvitov, 1937d 
*''[[Mesenchytraeus celticus]]'' Southern, 1909 
*''[[Mesenchytraeus chaunus]]'' Piper, MacLean & Christensen, 1982 
*''[[Mesenchytraeus chromophorus]]'' Altman, 1936 
*''[[Mesenchytraeus crenobius]]'' Timm, 1994 
*''[[Mesenchytraeus diplobulbosus]]'' Bell, 1949 
*''[[Mesenchytraeus diverticulatus]]'' Piper, MacLean & Christensen, 1982 
*''[[Mesenchytraeus eastwoodi]]'' Eisen, 1904 
*''[[Mesenchytraeus eltoni]]'' Stephenson, 1925 
*''[[Mesenchytraeus falciformis]]'' Eisen, 1878 
*''[[Mesenchytraeus flavidus]]'' Michaelsen, 1887 
*''[[Mesenchytraeus flavus]]'' (Levinsen, 1884) 
*''[[Mesenchytraeus fontinalis]]'' Eisen, 1904 
:*''[[Mesenchytraeus fontinalis fontinalis]]'' Eisen, 1904 
:*''[[Mesenchytraeus fontinalis gracilis]]'' Eisen, 1904 
*''[[Mesenchytraeus franciscanus]]'' Eisen, 1904 
*''[[Mesenchytraeus fuscus]]'' Eisen, 1904 
:*''[[Mesenchytraeus fuscus fuscus]]'' Eisen, 1904 
:*''[[Mesenchytraeus fuscus inermis]]'' Eisen, 1904 
*''[[Mesenchytraeus gaudens]]'' Cognetti, 1903a 
*''[[Mesenchytraeus gelidus]]'' Welch, 1916 
*''[[Mesenchytraeus gigachaetus]]'' Xie, 2012
*''[[Mesenchytraeus glandulosus]]'' (Levinsen, 1884) 
*''[[Mesenchytraeus grandis]]'' Eisen, 1904 
*''[[Mesenchytraeus grebnitzkyi]]'' Michaelsen, 1901 
*''[[Mesenchytraeus groenlandicus]]'' Nielsen & Christensen, 1959 
*''[[Mesenchytraeus hamiltoni]]'' Healy, 1996b 
*''[[Mesenchytraeus harrimani]]'' Eisen, 1904 
*''[[Mesenchytraeus hydrius]]'' Welch, 1919a 
*''[[Mesenchytraeus johanseni]]'' Welch, 1919b 
*''[[Mesenchytraeus kincaidi]]'' Eisen, 1904 
*''[[Mesenchytraeus kontrimavichusi]]''  Piper, MacLean & Christensen, 1982 
*''[[Mesenchytraeus konyamensis]]'' Michaelsen, 1916 
*''[[Mesenchytraeus kuehnelti]]'' Dózsa-Farkas, 1991a 
*''[[Mesenchytraeus kuril]]'' Healy & Timm, 2000 
*''[[Mesenchytraeus lusitanicus]]'' Collado, Martínez-Ansemil, and Giani, 1993 
*''[[Mesenchytraeus macnabi]]'' Bell, 1942 
*''[[Mesenchytraeus maculatus]]'' Eisen, 1904 
*''[[Mesenchytraeus magnus]]'' Altman, 1936 
*''[[Mesenchytraeus melanocephalus]]'' Christensen & Dózsa-Farkas, 1999 
*''[[Mesenchytraeus minimus]]'' Altman, 1936 
*''[[Mesenchytraeus mirabilis]]'' Eisen, 1878 
*''[[Mesenchytraeus monochaetus]]'' Bretscher, 1900 
*''[[Mesenchytraeus monodiverticulus]]'' Shen, Chen & Xie, 2012
*''[[Mesenchytraeus monothecatus]]'' Bell, 1945 
*''[[Mesenchytraeus multispinus]]'' (Grube, 1851) 
*''[[Mesenchytraeus nanus]]'' Eisen, 1904 
*''[[Mesenchytraeus obscurus]]'' Eisen, 1904 
*''[[Mesenchytraeus ogloblini]]'' Černosvitov, 1928b
*''[[Mesenchytraeus orcae]]'' Eisen, 1904 
*''[[Mesenchytraeus pedatus]]'' Eisen, 1904 
*''[[Mesenchytraeus pelicensis]]'' Issel, 1905c 
*''[[Mesenchytraeus penicillus]]'' Eisen, 1904 
*''[[Mesenchytraeus primaevus]]''  Eisen,  1878 
*''[[Mesenchytraeus rhithralis]]'' Healy & Fend, 2002 
*''[[Mesenchytraeus sanguineus]]'' Nielsen & Christensen, 1959 
*''[[Mesenchytraeus setchelli]]'' Eisen, 1904 
*''[[Mesenchytraeus solifugus]]'' (Emery, 1898) 
:*''[[Mesenchytraeus solifugus solifugus]]'' (Emery, 1898) 
:*''[[Mesenchytraeus solifugus rainierensis]]'' Welch, 1916 
*''[[Mesenchytraeus straminicolus]]'' Rota, 1995 
*''[[Mesenchytraeus sveni]]'' Christensen & Dózsa-Farkas, 1999 
*''[[Mesenchytraeus svetae]]'' Piper, MacLean & Christensen, 1982 
*''[[Mesenchytraeus tetrapodus]]'' Timm, 1978 
*''[[Mesenchytraeus torbeni]]'' Christensen & Dózsa-Farkas, 1999 
*''[[Mesenchytraeus tundrus]]'' Piper, MacLean & Christensen, 1982 
*''[[Mesenchytraeus unalaskae]]'' Eisen, 1904 
*''[[Mesenchytraeus variabilis]]'' Cejka, 1914 
*''[[Mesenchytraeus vegae]]'' Eisen, 1904 
*''[[Mesenchytraeus viivi]]'' Timm, 1978 
*''[[Mesenchytraeus vshivkovae]]'' Timm, 1994 
{{div col end}}

''Mesenchytraeus franzi'' is a [[junior synonym]] of ''[[Cognettia clarae]]''.<ref name="schmelz"/> ''Mesenchytraeus megachaetae'' Shen, Chen & Xie, 2011 has been renamed ''Mesenchytraeus gigachaetus'' Xie, 2012 due to the previous name being preoccupied by ''Mesenchytraeus megachaetae''  Bretscher, 1901, a junior synonym of ''[[Mesenchytraeus armatus]].''<ref name="schmelz2"/><ref name="xie2012">{{cite journal|author=Zhicai Xie|year=2012|title=''Mesenchytraeus gigachaetus'', new name, a replacement name for ''Mesenchytraeus megachaetus'' Shen et al., 2011|journal=Proceedings of the Biological Society of Washington|volume=125|issue=1|pages=18|url=https://www.proquest.com/openview/9d37b445c48281a28a8330a57d4f2497/1?pq-origsite=gscholar|doi=10.2988/11-41.1|s2cid=86642220|url-access=subscription}}</ref>