CreatureData

Squaretail worm

Eiseniella tetraedra (Savigny in Cuvier, 1826)

Status not recordedworms

The squaretail worm (Eiseniella tetraedra) is a species in the family Lumbricidae, order Crassiclitellata.

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Quick facts about the squaretail worm

Weight
Not recorded
Length
Not recorded
Lifespan
Not recorded
Main food
Not recorded
Habitat
Not recorded
Young per litter or clutch
Not recorded
Conservation status
Not recorded
Countries on record
Not recorded

Where does the squaretail worm live?

Not recorded

Where has it been introduced?

The Global Register of Introduced and Invasive Species lists the squaretail worm as introduced in 3 countries.

  1. Australia
  2. Jordan
  3. United States

Introduced means brought by people and now present; invasive means the country's checklist records an impact. A species can be native to one part of a country and introduced in another. Source: Global Register of Introduced and Invasive Species (CC BY 4.0).

Is the squaretail worm endangered?

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

How is the squaretail worm classified?

  1. kingdomAnimalia
  2. phylumAnnelida
  3. classClitellata
  4. orderCrassiclitellata
  5. familyLumbricidae
  6. genusEiseniella
  7. SpeciesEiseniella tetraedra (Savigny in Cuvier, 1826)

Synonyms Allolobophora tetraedrus, Allolobophora tetraedrus novis, Allurus bernensis, Allurus dubius, Allurus flavus, Allurus hercynius, Allurus macrurus, Allurus mollis, Allurus novis, Allurus pupa, Allurus tetraedrus, Allurus tetraedrus bernensis, Allurus tetraedrus flavus, Allurus tetraedrus infinitesimalis, Allurus tetraedrus luteus, Allurus tetraedrus novis, Allurus tetragonurus, Eisenia tetraedra, Eisenia tetraedra intermedia, Eisenialla tetraedra, Eiseniella intermedia, Eiseniella mollis, Eiseniella tatraedra, Eiseniella tetraeda, Eiseniella tetraedra bernensis, Eiseniella tetraedra eutypica, Eiseniella tetraedra f. typica, Eiseniella tetraedra hammoniensis, Eiseniella tetraedra hercynia, Eiseniella tetraedra intermedia, Eiseniella tetraedra phorogenesa, Eiseniella tetraedra popi, Eiseniella tetraedra proporandra, Eiseniella tetraedra quadripora, Eiseniella tetraedra tetraedra, Eiseniella tetraedra typica, Eiseniella tetraedra var. hercynia, Eiseniella tetraedra var. popi, Enterion tetraedrum, Helodrilus tetraedrus, Lumbricus agilis, Lumbricus amphisbaena, Lumbricus quadrangularis, Lumbricus tetraedrus, Lumbricus tetraedrus luteus, Lumbricus tetraedrus obscurus, Tetragonurus pupa

Other names and names in other languages (10)
  • Square-tailed wormEnglish
  • BækormDanish
  • VierkantwurmGerman
  • rantalieroFinnish
  • Ver à queue carréeFrench
  • bekkemeitemarkNorwegian Bokmål
  • VierhoekwormDutch
  • bekkemeitemakkNorwegian Nynorsk
  • sumpdaggmaskSwedish
  • BlokstaartwormDutch

Catalogue of Life

Relatives of the squaretail worm

Other species in the same genus Eiseniella.

CompareSquaretail worm vs Eiseniella koreanaSquaretail worm vs Eiseniella neapolitanaSquaretail worm vs Eiseniella ochridanaSquaretail worm vs Eiseniella oltenica

Common questions

Answered only where our data holds the answer.

Is the squaretail worm an invasive species?

The Global Register of Introduced and Invasive Species lists the squaretail worm as introduced in 3 countries: Australia, Jordan and United States, but does not flag it as invasive in any of them.

What kind of animal is the squaretail worm?

The squaretail worm (Eiseniella tetraedra) belongs to the family Lumbricidae in the order Crassiclitellata.

Sources and how to cite this page

Data as of 2026-11-14. How this page is put together.

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APA

CreatureData. (2026). Squaretail worm (Eiseniella tetraedra). Retrieved from https://creaturedata.com/animals/squaretail-worm

MLA

“Squaretail worm (Eiseniella tetraedra).” CreatureData, 2026, https://creaturedata.com/animals/squaretail-worm.

BibTeX
@misc{squaretail_worm_2026,
  title = {Squaretail worm (Eiseniella tetraedra)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/squaretail-worm},
  note = {Data as of 2026-11-14}
}