One of the earliest known terrestrial -LRB- land-dwelling -RRB- gastropods is Maturipupa which is found in the Coal Measures of the Carboniferous period in LOCATION@1 , but relatives of the modern land snails are rare before the MISC@1 period , when the familiar Helix first appeared .

One of the earliest known terrestrial -LRB- land-dwelling -RRB- gastropods is Maturipupa which is found in the Coal Measures of the Carboniferous period in LOCATION@1 .
