Mytilaster

{{Short description|Genus of bivalves}}

{{Automatic taxobox

| image = Mytilaster lineatus1.jpg

| image_caption = Mytilaster lineatus

| taxon = Mytilaster

| authority = Monterosato, 1884{{cite book | url = https://www.biodiversitylibrary.org/item/109711#page/2/mode/1up | title = Nomenclatura Generica e Specifica di alcune Chonchigle Mediterranee pel Marchese di Monterosato | date = 1884 | accessdate = 31 December 2016 | publisher = Biodiversity Heritage Library}}

| type_species = Mytilaster lineatus

| type_species_authority = (Gmelin, 1791)

| synonyms = Mytilodonta Coen, 1935

|synonyms_ref =

}}

Mytilaster is a genus of marine mussels from the warmer waters of the Atlantic Ocean and Mediterranean Basin. The type species is Mytilaster lineatus.{{cite web | url = http://www.marinespecies.org/aphia.php?p=taxdetails&id=138227 | title = Mytilaster Monterosato, 1884 | accessdate = 31 December 2016 | publisher = World registry of Marine Species}}