Trigonocercella

{{Short description|Extinct genus of trilobites}}

{{Automatic taxobox

|fossil_range = Early Arenig

|taxon = Trigonocercella

|authority=Hintze, 1952

|subdivision_ranks = Species

|subdivision =

• T. acuta

}}

Trigonocercella is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the early part of the Arenig stage of the Ordovician Period, a faunal stage which lasted from approximately 478 to 471 million years ago.{{cite journal

| last = Sepkoski| first = Jack| title = A compendium of fossil marine animal genera (Trilobita entry)| journal = Bulletins of American Paleontology| volume = 364|page=560| year = 2002| url = http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=307&rank=class| access-date = 2008-01-12 }}