Tetrastemma

Tetrastemma
	Preserved specimen of Tetrastemma
Scientific classification
Kingdom:	Animalia
Phylum:	Nemertea
Class:	Hoplonemertea
Order:	Monostilifera
Family:	Tetrastemmatidae
Genus:	Tetrastemma ; Ehrenberg, 1831

Last updated August 29, 2025

Tetrastemma is a genus of nemerteans belonging to the family Tetrastemmatidae.^[1]

The genus has cosmopolitan distribution.^[1]

Species

Species:^[2]

Tetrastemma aberrans Coe, 1901
Tetrastemma aequicolor Chernyshev, 2024
Tetrastemma albomaculatum Chernyshev, 2016
Tetrastemma album Hookabe, Kohtsuka, Fujiwara, Tsuchida & Ueshima, 2023
Tetrastemma ambiguum Riches, 1893
Tetrastemma amphiporoides Bürger, 1893
Tetrastemma angulatus Senz, 1993
Tetrastemma antarcticum Bürger, 1893
Tetrastemma appendiculatum Chernyshev, 1998
Tetrastemma aseptata (Friedrich, 1935)
Tetrastemma assimile Örsted, 1844
Tetrastemma bacescui Müller, 1962
Tetrastemma baculus (Quatrefages, 1846)
Tetrastemma basinum Corrêa, 1957
Tetrastemma beaumonti (Southern, 1913)
Tetrastemma benedeni Czerniavsky, 1880
Tetrastemma bicolor Coe, 1901
Tetrastemma bilineatum Coe, 1904
Tetrastemma bioculatum Örsted, 1843
Tetrastemma bistriatum (Timofeeva, 1912)
Tetrastemma brunneum (Friedrich, 1935)
Tetrastemma buxeum Bürger, 1895
Tetrastemma candidum (Müller, 1774)
Tetrastemma carneum Hookabe, Oya, Tsuchida, Fujiwara & Ueshima, 2023
Tetrastemma cerasinum Bürger, 1895
Tetrastemma cincum Corrêa, 1957
Tetrastemma coronatum (Quatrefages, 1846)
Tetrastemma cruciatum Bürger, 1895
Tetrastemma cupido Hookabe, Kohtsuka & Kajihara, 2021
Tetrastemma diadema Hubrecht, 1879
Tetrastemma dubium Örsted, 1845
Tetrastemma duboisi Bürger, 1893
Tetrastemma dutoiti (Wheeler, 1940)
Tetrastemma elegans (Girard, 1852)
Tetrastemma elongatum (Stephenson, 1911)
Tetrastemma enteroplecta (Corrêa, 1954)
Tetrastemma falsum Bürger, 1895
Tetrastemma flavidum Ehrenberg, 1828
Tetrastemma fozense Gibson & Junoy, 1991
Tetrastemma freyae Chernyshev, Polyakova, Vignesh, Jain, Sanjeevi, Norenburg & Rajesh, 2020
Tetrastemma fulvum Kirsteuer, 1963
Tetrastemma georgianum Bürger, 1893
Tetrastemma glanduliferum Bürger, 1895
Tetrastemma hansi Bürger, 1893
Tetrastemma hermaphroditicum (Keferstein, 1868)
Tetrastemma herouardi (Oxner, 1908)
Tetrastemma herthae Corrêa, 1963
Tetrastemma humile (Quatrefages, 1846)
Tetrastemma incisum Stimpson, 1855
Tetrastemma insolens Iwata, 1952
Tetrastemma interruptum
Tetrastemma jeani McCaul, 1963
Tetrastemma kangauzi Chernyshev, 2003
Tetrastemma kefersteinii (Marion, 1869)
Tetrastemma kirsteueri Senz, 1995
Tetrastemma knochii (Kölliker, 1845)
Tetrastemma laminariae Ushakov, 1928
Tetrastemma leonillae (Oxner, 1908)
Tetrastemma lilianae Corrêa, 1958
Tetrastemma longissimum Bürger, 1895
Tetrastemma longistriatum Wheeler, 1934
Tetrastemma lophoheliae Bergendal, 1903
Tetrastemma maculatum (Timofeeva, 1912)
Tetrastemma maivikenensis Wheeler, 1934
Tetrastemma marionis Joubin, 1890
Tetrastemma melanocephalum (Johnston, 1837)
Tetrastemma merula (Corrêa, 1954)
Tetrastemma microocelli (Sun, 1995)
Tetrastemma mixtum (Timofeeva, 1912)
Tetrastemma montagui Senz, 2001
Tetrastemma nanum Corrêa, 1957
Tetrastemma nigrifrons Coe, 1904
Tetrastemma nigrolineatum Wheeler, 1934
Tetrastemma nimbatum Bürger, 1895
Tetrastemma oerstedi Senz, 2001
Tetrastemma olgarum Chernyshev, 1998
Tetrastemma omicron Joubin, 1902
Tetrastemma parallelos Abato, Yoshida & Kajihara, 2022
Tetrastemma persona Hookabe, Kohtsuka, Fujiwara, Tsuchida & Ueshima, 2023
Tetrastemma phaeobasisae Kulikova, 1987
Tetrastemma pimaculatum Chernyshev, 1998
Tetrastemma pinnatum Iwata, 1954
Tetrastemma piolinum Corrêa, 1957
Tetrastemma polyakovae Sagorny, von Döhren, Rouse & Tilic, 2022
Tetrastemma portus Bürger, 1895
Tetrastemma primum Corrêa, 1954
Tetrastemma pseudocoronatum Chernyshev, 1998
Tetrastemma quadrilineatum Coe, 1904
Tetrastemma quadristriatum Langerhans, 1880
Tetrastemma quadristriatum Grube, 1869
Tetrastemma quatrefagesi (Bürger, 1904)
Tetrastemma reticulatum Coe, 1904
Tetrastemma robertianae McIntosh, 1874
Tetrastemma rollandi Joubin, 1905
Tetrastemma roseocephalum (Yamaoka, 1947)
Tetrastemma roseum Verrill, 1892
Tetrastemma schultzei Czerniavsky, 1880
Tetrastemma scutelliferum Bürger, 1895
Tetrastemma sexlineatum Coe, 1940
Tetrastemma shohoense Hookabe, Kohtsuka, Fujiwara, Tsuchida & Ueshima, 2023
Tetrastemma signifer Coe, 1904
Tetrastemma simplex (Timofeev, 1911)
Tetrastemma stanleyi Wheeler, 1934
Tetrastemma stimpsoni Chernyshev, 1992
Tetrastemma strandae Sagorny, von Döhren, Rouse & Tilic, 2022
Tetrastemma subpellucidum Örsted, 1843
Tetrastemma suhmi (Bürger, 1904)
Tetrastemma sundbergi Sagorny, von Döhren, Rouse & Tilic, 2022
Tetrastemma tanikelyensis Kirsteuer, 1965
Tetrastemma tristibruna Sundberg & Gibson, 1995
Tetrastemma turdum Corrêa, 1957
Tetrastemma tutus (Monastero, 1930)
Tetrastemma unicolor (Hubrecht, 1879)
Tetrastemma vastum Bürger, 1895
Tetrastemma verinigrum Iwata, 1954
Tetrastemma vermiculus (Quatrefages, 1846)
Tetrastemma verrilli (Bürger, 1904)
Tetrastemma viera (Timofeev, 1911)
Tetrastemma viperula (Timofeev, 1911)
Tetrastemma virgatum Kirsteuer, 1963
Tetrastemma vittigerum (Bürger, 1904)
Tetrastemma weddelli Wheeler, 1934
Tetrastemma wilsoni Coe, 1943
Tetrastemma worki Corrêa, 1961}

References

1 2 "Tetrastemma Ehrenberg, 1831". www.gbif.org. Retrieved 4 July 2021.
↑ J. Norenburg, A. Chernyshev, H. Kajihara, S. Maslakova (2025): Tetrastemma Ehrenberg, 1831. World Nemertea Database. Accessed through: World Register of Marine Species on 28 August 2025.

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[GBIF-1] 1 2 "Tetrastemma Ehrenberg, 1831". www.gbif.org. Retrieved 4 July 2021.

[WoRMS-2] J. Norenburg, A. Chernyshev, H. Kajihara, S. Maslakova (2025): Tetrastemma Ehrenberg, 1831. World Nemertea Database. Accessed through: World Register of Marine Species on 28 August 2025.

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