Freshwater snails » Shell shape » Shell taller than wide » Dextral shell » Dextral shell with operculum » Freshwater or brackish? » Brackish water Rissoacea » Brackish water Hyrobiidae
FAMILY: HYDROBIIDAE associated with brackish-water
The shells illustrated here lack their opercula.
If the shell breadth is less than half the height AND the body whorl is less than 70% of the height AND the umbilicus is a mere chink or entirely closed, PLEASE CONTINUE ON THIS PAGE.
If your specimen does NOT fit the above criteria, please go back to "Brackish water Rissoacea" to try again.
Is the shell solid, comprised of 6-7 whorls which are nearly flat-sided, the last having a slight keel, and a mouth aperture which is slightly angulated, like this one ?
Or is the shell more delicate, with tumid whorls like one of these ?
Please click on the image most like your specimen in order to continue.