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Triops cancriformis

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Triops cancriformis

Along with T. longicaudatus, and L. apus, this is the most widespread and common of the triops.  Next to T. longicaudatus, it is the most studied.  It also shares the honor of being considered a rice crop pest with T. longicaudatus. Notable in that it is probably the “proto-triops” from which all the others have evolved in the past 200 or so million years, it is also the oldest known living species of any animal.

Major species

Triops cancriformis


  • Triops cancriformis cancriformis
  • Triops cancriformis mauretanicus
  • Triops cancriformis simplex


  • Africa
    • Senegal
    • South Africa
  • Asia
    • India (?)
    • Japan
    • Russia
  • Europe
    • Austria
    • Czech Republic
    • Denmark
    • England
    • France
    • Germany
    • Hungaria
    • Italy
    • Macedonia
    • Portugal
    • Scandinavia
    • Scotland
    • Slovakia
    • Spain
    • Sweden
    • Yugoslavia
  • Israel
  • Maltese Islands


Temporary fresh or brackish waters

Temperature range

Minimum Temp: 10°C (50°F) Maximum Temp: 28°C (82°F)

Body ring/segments

32 – 35; 4 – 9 apodous


48 – 57

Notable characters

Furca generally long


Bisexual (often female biased), hermaphroditic, and unisexual

Life span

Approximately 100 days. Usually half that in a Aquarium.

My Triops (May 20, 2024) Triops cancriformis. Retrieved from
"Triops cancriformis." My Triops - May 20, 2024,
My Triops July 13, 2020 Triops cancriformis., viewed May 20, 2024,<>
My Triops - Triops cancriformis. [Internet]. [Accessed May 20, 2024]. Available from:
"Triops cancriformis." My Triops - Accessed May 20, 2024.
"Triops cancriformis." My Triops [Online]. Available: [Accessed: May 20, 2024]
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  • {Living fossil} - Fossil have been found and back to more than 220 million years ago. They are thougt to have been on the planet even longer than that, up to 350 million years
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