A family of parasitic flatworms (flukes) characterized by two suckers and typically found in various animals.
From distoma plus -idae, the standard Latin suffix for biological family names in taxonomy. Named for the two-sucker characteristic.
Biological family names always end in -idae (for animals) or -aceae (for plants)—Linnaeus invented this naming system in 1735, and it still works perfectly because these suffixes immediately tell scientists 'this is a biological category level.'
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