Wizard Hat Amoeba Named After Gandalf From The Lord Of the Rings

By Jeffrey Shao on April 20, 2017

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A.Gandalfi amoeba resembles Lord Of The Ring Wizard, Gandalf’s hat

Single-celled amoebae, which resemble small blobs of jelly, are usually of interest only to the researchers that discover them. However, a new South American species is garnering significant attention from fans of the epic Lord of the Rings trilogy by J.R.R.Tolkien. That’s because its unique shell, or carapace, bears a close similarity to the hat donned by Gandalf, the powerful wizard leader of the Fellowship of the Ring and the army of the West.

Named Arcella gandalfi in honor of Tolkien's wizard, the amorphous organism had previously been observed in many parts of Brazil. However, researchers could never collect enough specimens to test if the freshwater amoebae were a new species. That changed after Jordana de Carvalho e Féres stumbled upon them in large numbers in the water samples she collected in Amapá and Rio de Janeiro. To investigate the unusual-looking organisms, the biologist teamed up with Professor Daniel J.G. Lahr from the University of Sao Paulo.


Newly found Arcella gandalfi looks like Gandalf's hat (upper left) while other amoebae from the Arcella genus look like other types of hats. Arcella brasiliensis (top right) is thought to be closely related to A. gandalfi. The amoebae Arcella intermedia (bottom right) and Arcella laevis (bottom left) show the diversity of shell shapes that these single-celled organisms can create. (Image Credit: Alfredo L. Porfírio-Sousa; Jordana C. Féres)

Using an electron microscope, the team was able to obtain the measurements and images necessary to conclude that A. gandalfi was a new species. Lahr also believes that this strange amoeba is exclusive to South America. The organism, whose color ranges from light yellow to brown, can be found in wetlands, damp soils, and bogs. Though its carapace measures a mere 81-microns wide by 71-microns tall, the amoeba is a giant among single-celled organisms. Most amoebae that belong to its genus, Arcella, measure less than half its size and are typically disk-shaped.

The researchers, who published their findings in the journal Acta-Protozoologica in December 2016, aren't sure why the carapace is hat-shaped. Since the shell has been found inside the stomachs of predator microorganisms, it clearly does not serve as a defense mechanism. The scientists speculate its primary purpose may be to store moisture to protect against fluctuating water levels in the amoeba’s habitat. The carapace could also be shielding the single-celled organism from the sun’s harmful ultraviolet rays. According to Professor Lahr, “A multicellular organism has a number of protective barriers against UV radiation, including a layer of keratin, as well as skin pigments. In the case of single-cell organisms like amoebae, their DNA is basically exposed.”

Eriovixia gryfindori resembles Harry Potter sorting hat (Photo Credit: Javed Ahmed et. al)

A.gandalfi is not the only interesting-looking species discovered recently. A few months ago, scientists in South West India stumbled upon a new kind of spider that closely resembles the sorting hat in J.K. Rowling’s popular Harry Potter books. Javed Ahmed and Rajashree Khalap, both fans of the series, have named the spider, Eriovixia gryfindori in tribute to the hat’s owner — Hogwarts founder, Godric Gryffindor!

Resources: newatlas.com, dailymail.co.uk, arcella.nl

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Article Comprehension (8 questions)

  1. Why is the recently discovered amoeba interesting to Lord of the Rings fans?
  2. What has the amoeba been named?

Critical Thinking Challenge

Can you think of a reason for the spider's sorting hat-shaped back?

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Vocabulary in Context

"Lahr also believes that this strange amoeba is exclusive to South America."

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171 Comments
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  • sasharules
    sasharulesThursday, April 27, 2017 at 5:54 pm
    SPIDERS! *shriek*
    • kittycuddle36
      kittycuddle36Thursday, April 27, 2017 at 4:53 pm
      WOW!!!!!!
      • 5eagent0012
        5eagent0012Thursday, April 27, 2017 at 12:29 pm
        why does it have a hat
        • sasharules
          sasharulesThursday, April 27, 2017 at 5:50 pm
          I think it is just the way that it was born, like a cheetah was born with stripes!
        • diamondtoorough
          diamondtooroughThursday, April 27, 2017 at 11:31 am
          How can they take something I love which is Harry Potter and then mix it with something I hate which is spiders. EWWW
          • sasharules
            sasharulesThursday, April 27, 2017 at 5:49 pm
            They didn't take anything from Harry Potter, actually! They took it from Lord of the Rings. lol
          • abyrd
            abyrdThursday, April 27, 2017 at 9:53 am
            woah!!!
            • MR.MINECRAFTThursday, April 27, 2017 at 9:38 am
              AWESOME!
              • Neardy🤓Thursday, April 27, 2017 at 7:45 am
                So weard 🕷
                • puppyprincessThursday, April 27, 2017 at 7:28 am
                  wow its so cool they made the hat
                  • sasharules
                    sasharulesThursday, April 27, 2017 at 5:51 pm
                    They didn't make the hat, the gandalfi was born like with a hat-like body.
                  • XDWednesday, April 26, 2017 at 5:45 pm
                    it says harry potter then lord of the rings make up your cohice XD
                    • memphisx43
                      memphisx43Wednesday, April 26, 2017 at 10:30 am
                      I own all the movies

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