Diplonema (excavate)

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Scientific classification
Domain: Eukaryota
(unranked): Excavata
Phylum: Euglenozoa
Class: Diplonemea
Order: Diplonemida
Family: Diplonemidae
Genus: Diplonema
Griessmann 1913 non Don 1837
  • D. breviciliata Griessman 1913
  • D. nigricans (Schuster, Goldstein & Hershenow 1968) Triemer & Ott 1990
  • D. papillatum (Porter 1973) Triemer & Ott 1990
  • D. ambulator Larsen & Patterson 1990
  • D. metabolicum Larsen & Patterson1990
  • Isonema Schuster, Goldstein & Hershenow 1968 non Brown

Diplonema is a genus of free living excavates in the Euglenozoa. They are distinguished from Rhynchopus in Class Diplonemea by the absence of a fully flagellate dispersive stage.


Diplonema feature two short flagella of equal length and two subapical openings. Most are free living, but there have been reported cases of infection in clams and sudden decomposition of aquarium plants. It was described initially in 1914 and later rediscovered in the 60s and called Isonema, wrongly classified among euglenids.[1][2]


  1. ^ W. Marande, J. Lukeš y G. Burger, Unique Mitochondrial Genome Structure in Diplonemids, the Sister Group of Kinetoplastids, Eukaryot Cell. 2005 June; 4(6): 1137–1146.
  2. ^ Brands, S.J. (comp.) 1989-2007. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. [1], Fecha de acceso: 7 de Febrero del 2016.