Mattheva

{{Taxobox

| image = Matthevia.JPG

| image_caption = Separate Matthevia plates compared to a coin with the diameter of 19 mm.

| regnum = Animalia

| phylum = Mollusca

| classis = †Mattheva(?) Polyplacophora(?)

| ordo =

| familia =

| genus =

| species =

| genus_authority = Sokolov and Fedonkin, 1984

| fossil_range = {{fossil range|Cambrian}}

}}

Mattheva is a class of prehistoric mollusc from the late Cambrian,{{Cite journal

| last = Yochelson | first = E.L

| title = Mattheva, a proposed new class of mollusks

| year = 1966

}} which might be better incorporated in a different class.{{Cite journal | first1=B. | first2= J.| last2= Pojeta Jr| title = Molluscan Phylogeny: the Paleontological Viewpoint| volume = 186| last1= Runnegar| journal = Science| issue = 4161| pages = 311–317| date=Oct 1974 | jstor = 1739764| pmid = 17839855| doi = 10.1126/science.186.4161.311|bibcode = 1974Sci...186..311R | s2cid= 46429653}} It was erected to accommodate chiton-like organisms such as Matthevia.

Although questionable, phosphatic fossils have been included in this class, even though molluscs do not use phosphate in their bodies.{{Cite journal| first=E. L.| title = Discussion of early Cambrian "molluscs"| url = http://jgs.geoscienceworld.org/cgi/reprint/131/6/661.pdf| last = Yochelson| journal = Journal of the Geological Society| volume = 131| issue = 6| pages = 661–662| year = 1975| doi = 10.1144/gsjgs.131.6.0661| bibcode = 1975JGSoc.131..661.| s2cid = 219540340}}