Duffinselache

{{Short description|Extinct genus of sharks}}

{{speciesbox

| genus = Duffinselache

| species = holwellensis

| fossil_range = Late Triassic, {{fossil_range|Rhaetian}}

| authority = (Duffin, 1998)

| parent_authority = Andreev & Cuny, 2012

| synonyms = {{extinct}}Polyacrodus holwellensi Duffin, 1998

}}

Duffinselache (Duffin's shark) is an extinct genus of basal shark elasmobranchii cartilaginous fish, known from a single species, Duffinselache holwellensis, collected from the Late Triassic (Rhaetian stage) of England.{{cite taxon|PBDB|title=Duffinselache |id=275504 |access-date=6 March 2025}} It was first named by Duffin in 1998 as a species of Polyacrodus. Plamen S. Andreev and Gilles Cuny in 2012 reassigned it to a new genus as its type species, Polyacrodus holwellensis.{{Cite journal|author=Plamen S. Andreev & Gilles Cuny |year=2012 |title=New Triassic stem selachimorphs (Chondrichthyes, Elasmobranchii) and their bearing on the evolution of dental enameloid in Neoselachii |journal=Journal of Vertebrate Paleontology |volume=32 |issue=2 |pages=255–266 |doi=10.1080/02724634.2012.644646 |bibcode=2012JVPal..32..255A |s2cid=84162775 }}