Tectarius viviparus

{{Short description|Species of gastropod}}

{{Use dmy dates|date=January 2023}}

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| taxon = Tectarius viviparus

| authority = (Rosewater, 1982)

| synonyms_ref =

| synonyms = Echininus viviparus Rosewater, 1982

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Tectarius viviparus is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.{{WRMS species|445512|Tectarius viviparus (Rosewater, 1982)|||Reid, David G. (2009). Tectarius viviparus (Rosewater, 1982). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=445512 on 6 June 2010}}