Tectarius grandinatus

{{Short description|Species of gastropod}}

{{Use dmy dates|date=April 2020}}

{{Speciesbox

| image =Naturalis Biodiversity Center - ZMA.MOLL.320003 - Tectarius grandinatus (Gmelin, 1791) - Littorinidae - Mollusc shell.jpeg

| image_caption =

| taxon = Tectarius grandinatus

| authority = (Gmelin, 1791)

| synonyms_ref =

| synonyms =

• Monodonta coronaria Lamarck, 1816
• Tectarius bullatus (Martyn, 1784)
• Trochus bullatus Martyn, 1784

}}

Tectarius grandinatus is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.{{WRMS species|446938|Tectarius grandinatus (Gmelin, 1791)|||Reid, David G. (2010). Tectarius grandinatus (Gmelin, 1791). In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=446938 on 6 June 2010}}