Post by Robert Nordsieck on Sept 26, 2006 20:45:46 GMT
Among snails a form of misshapen shell may occur, when the shell is atypically much higher than usual.
Those shells' whorls are not tightly coiled like in the normal type, but stretched along the shell's longitudinal axis and set apart like the steps of a staircase.
Such a type of misshapen shell is called a scalariform or scalarid shell ("scala": Latin for stairs). Except among Roman snails and other snails of the Helicidae family scalarid shells may even be found among sea snails.
See new page: The scalariform shell on www.weichtiere.at!
Picture: "Scalariform Cepaea nemoralis and normal type in comparison" by Gudrun Ruf.
Regards
Robert
Those shells' whorls are not tightly coiled like in the normal type, but stretched along the shell's longitudinal axis and set apart like the steps of a staircase.
Such a type of misshapen shell is called a scalariform or scalarid shell ("scala": Latin for stairs). Except among Roman snails and other snails of the Helicidae family scalarid shells may even be found among sea snails.
See new page: The scalariform shell on www.weichtiere.at!
Picture: "Scalariform Cepaea nemoralis and normal type in comparison" by Gudrun Ruf.
Regards
Robert
