Rigelian

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There are several species that go by the name "Rigelian" or "Rigellian":

• The primitive human-like Rigellians of Rigel VII. This species includes an infamous subspecies, the Kaylar. (TOS episode: "The Cage"; EV comic: "Our Dearest Blood")

• The four (or five)-gendered Rigelians who participated in early negotiations (in the 2150s) about forming a Coalition of Planets with Earth, Andor, and others. (ENT episode: "United", et al.)

• The vulcanoid Rigelians, inhabitants of Rigel V. (TOS novel: Mind Meld)

• The Rigellian Chelons, said to be descended from "saber-toothed turtles," also called the Chelarians. (TOS movie: Star Trek: The Motion Picture; Decipher RPG)

• The silver-skinned Rigelians (serialized novel: Starfleet: Year One), who have been known to travel as far from home as the orbital city Oblivion. (STA novel: Oblivion)

• The furred Rigellians, whose reputation as sharp traders wasn't upstaged until contact with the Ferengi. (TOS novel: The Final Reflection)

• The inhabitants of Rigel IV, who appear human externally, but have a vulcanoid physiology. (TLE novel: Catalyst of Sorrows)

In 2370, there were Rigellians present for the trade negotiations at Deep Space Nine. The Rigellian ambassador was injured when a bomb exploded in Pylon 4 (Lower Pylon 1). Which Rigellian species she was, is unknown. (DS9 novel: Betrayal)

A Human-like Rigellian

A Rigellian Kaylar warrior

A Rigelian from the 2150s

A pair of Rigellian Chelons