Sandtorpia is an extinct genus of Cambrian arthropods from the Orsten of Sweden.

[1] Sandtorpia is known from a single "head larva" specimen, closely matching with the fifth stage of Henningsmoenicaris, roughly 370 micrometers long.

Its body is covered with a large carapace, with an exceptionally long and spiny tail spine at its end.

While Sandtorpia shares many features with Henningsmoenicaris, therefore suggesting they are likely related, it also has various differences such as a much longer tail spine and lack of eyes (although in the fifth stage of Henningsmoenicaris the eyes are very simple)[1][2] The name Sandtorpia derives from Sandtorp, a small assemblage of houses near the discovery site.

The specific name vestrogothiensis derives from Vestrogothia, the Latin name of Västergötland, the area of Sweden where the fossils are from.