Assertion: gastropod | /r/HasAspect | shell
Facets:
value: during embryonic development
type: TEMPORAL
value: originally
type: OTHER
Source sentences:
text: In limpets and most gastropods, however, the evolutionary torsion which took place and allowed the gastropods to have a shell into which they could completely withdraw has caused the anus to be located near the head.
text: Some gastropods have no shell at all, or only an internal shell or internal calcareous granules, and these species are often known as slugs.
text: Many gastropods such as snails and limpets have one shell.
text: Many gastropods have a shell.
text: While originally all gastropods have a shell, among slugs it is reduced during embryonic development.
text: Actually, every gastropod has a shell but in slugs during embryonic development, it has reduced and eased their mobility.