[3][4] The type specimen, uncovered between 1962 and 1967 by German zoologist and paleontologist Georg Krusat, is distinguished by prominent denticles at the front and rear ends of the crown, and comes from an individual under 2 m (6.6 ft) long.

[8] Trimucrodon was originally referred to as a member of the ornithopod family Fabrosauridae by Thulborn in 1973, closest to Echinodon but also related to Alocodon and Fabrosaurus.

[9] Given that the species was only represented by teeth, Trimucrodon was designated as a nomen dubium in 1990 by David B. Weishampel and Lawrence M. Witmer, as an indeterminate member of Ornithischia outside Ornithopoda.

[10] While a basal ornithischian position outside Ornithopoda was retained by Paul Sereno in 1991, it was considered a possibly valid taxon based on its prominent anterior and posteriormost denticles.

[11] While the identity as a possible heterodontosaurid was upheld by Ruiz-Omeñaca and José Canudo in 2004,[12] in the same year Weishampel, Witmer and colleague David B. Norman followed their 1990 opinion on Trimucrodon, placing it as a dubious ornithischian, though they noted that further study could potentially support the validity of the taxon.