Assertion: gastropod's shell | /r/HasProperty | dextral
Facets:
Source sentences:
text: The shell of most knobbed whelks is dextral, meaning that it is right-handed.
text: All coiled shell Planorbidae are sinistral in their shell coiling, as is proved by their internal anatomy (the respiratory and the genital orifice are situated on the left side), however the animals carry their shells with what would normally be the ventral (i.e. umbilical) surface uppermost, and because of this, the shells appear to be dextral.