The Dopterians are an unscrupulous humanoid species found throughout the Alpha Quadrant.
They are distant relatives of the Ferengi, with which they share an inablility to be read by telepathic species such as Betazoids. (TNG: "Firstborn", DS9: "The Forsaken")
Dopterians also share an unusual resemblance to the Kobheerian species; their appearance is almost identical, however Dopterians have Ferengi-like noses, whereas Kobheerians have two large, elongated flat nostrils in the place of a nose.
People
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Appearances
Background
The Dopterians apparently have an automated attack weapon known as a "Dopterian interceptor" according to DS9: "Business as Usual". The name was not verbally given on screen, however, the attacking device was identified as such in the script.
In the script for "The Forsaken", a Dopterian present near Lwaxana Troi was described as a 'distant cousin to a Ferengi'.