Buenellus higginsi is an average size (about 5 centimetres or 2.0 inches) trilobite, which lived during the Lower Cambrian period, in what is now North-West Greenland.

The general outline of the body is rounded n the front third, parallel sided in the middle third, and progressively tapering backwards in the back third, ending at an angle of approximately 45° with the midline.

[1][2] The general shape of the body of other species in the Nevadid family (like Nevadia and Nevadella) is shorter, with the greatest width across the back of the cephalon, and the entire thorax tapering backwards.

Buenellus higginsi has been collected from early to middle Atdabanian deposits at the lower Buen Formation (“Nevadella” Zone), Sirius Passet lagerstätte at its junction with the J. P. Koch Fjord, Peary Land, Greenland 82°47.6′N 42°13.7′W / 82.7933°N 42.2283°W / 82.7933; -42.2283.

Buenellus higginsi, one of the earliest known trilobites from Laurentia, seems to have played an important role in the Sirius Passet ecosystem, serving both as predator on, and prey for, contemporary animals.