Echinochiton

{{Short description|Extinct genus of molluscs}}

{{speciesbox

| fossil_range = {{fossil_range|Middle Ordovician}}

| grandparent_authority = Pojeta et al., 2003

| parent_authority = Pojeta et al., 2003

| genus = Echinochiton

| species = dufoei

| authority = Pojeta et al., 2003

}}

Echinochiton is an extinct genus of Ordovician chitons{{cite journal |author1=John Pojeta, Jr. |author2=D. J. Eernisse |author3=R. D. Hoare |author4=M. D. Henderson |title=Echinochiton dufoei: a new spiny Ordovician chiton |journal=Journal of Paleontology |volume=77 |issue=4 |pages=646–654 |doi=10.1666/0022-3360(2003)077<0646:EDANSO>2.0.CO;2 |year=2003 | jstor = 4094813}} with hollow spines on its margins; these spines, which are unique among the chitons, have a strong organic component and show growth lines.{{Cite journal| last1 = Pojeta Jr. | first1 = J. | first2 = J.| title = New information about Echinochiton dufoei, the Ordovician spiny chiton| journal = American Malacological Bulletin| volume = 25| pages = 25–34| year = 2008| doi = 10.4003/0740-2783-25.1.25| last2 = Dufoe| s2cid = 85968621 }}