Félix Dujardin

Félix Dujardin (5 April 1801 – 8 April 1860) was a French biologist born in Tours. He is remembered for his research on protozoans and other invertebrates.

Félix Dujardin
Félix Dujardin, painting by his daughter, 1847
Born5 April 1801 (1801-04-05)
Tours, France
Died8 April 1860 (1860-04-09) (aged 59)
Rennes, France
CitizenshipFrench
Known forprotozoans helminths
Scientific career
FieldsBiology Parasitology
InstitutionsUniversity of Rennes, France
Author abbrev. (botany)Dujard.
Signature

Biography
Eucoleus aerophilus (Creplin, 1839) Dujardin, 1845 (Nematoda), an example of the parasites on which Dujardin worked

In 1840 he was appointed professor of geology and mineralogy at the University of Toulouse, and during the following year was a professor of zoology and botany at Rennes. In regard to his educational background, Dujardin was largely self-taught, the son of a watchmaker.

Dujardin worked with microscopic animal life, and in 1834 proposed that a new group of one-celled organisms be called Rhizopoda. He denied naturalist Christian Gottfried Ehrenberg's theory that microscopic organisms were "complete organisms" similar to higher animals, specifically noting that they had specialized structures unique to single-celled organisms, which meant that foraminifera he was studying was not, as his contemporaries believed it to be, a mollusk. [1] In addition to his studies of microscopic life, he did extensive research on invertebrate groups that included echinoderms, hexapods, helminths and cnidarians.

In the Foraminifera, he noticed an apparently formless life substance that he named "sarcode", later renamed protoplasm by Hugo von Mohl (1805–1872).

Dujardin also remains famous for the identification and the first description in 1850 of the mushroom bodies (corpora pedunculata)[2] in the hymenopteran brain (bee, bumblebee, sphex, ant, fruitfly Drosophila melanogaster, etc.), which he postulated for the first time that they were the site of intelligence. This major discovery will eventually prove to be almost accurate, as these structures are now considered the place where memory and many other behaviors are formed and processed in invertebrates.[3]

Bibliography
A plate from Histoire naturelle des helminthes ou vers intestinaux

The standard author abbreviation Dujard is applied to species he described.

References
  • Louis Joubin, 1901, Félix Dujardin, 1801-1860. Archives de Parasitologie, Volume 4, 5-60. PDF
  • Huard, P; Theodorides, J (1959). "[5 Unrecognized parasitologists.]". Biologie médicale (published Apr 1959). 48 (Special No): i–xci. PMID 13651265.
  1. Nicholas James Strausfield (2012). Arthropod Brains.
  2. Dujardin, F. 1850. Mémoire sur le système nerveux des insectes. Ann. Sci. Nat. Zool. 14: 195-206.
  3. Strausfeld NJ, Hansen L, Li Y, Gomez RS, Ito K (1998). "Evolution, Discovery, and Interpretations of Arthropod Mushroom Bodies". Learn. Mem. 5 (1–2): 11–37. doi:10.1101/lm.5.1.11 (inactive 2021-01-18). PMC 311242. PMID 10454370.CS1 maint: DOI inactive as of January 2021 (link)

External sources
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