Assertion: gastropod's shell | /r/CapableOf | create problem
Facets:
value: for taxonomists
type: TRANSITIVE-OBJECT
Source sentences:
text: In the first half of the 20th century, the type material for the species was thought to have been lost; in other words, the shell on which Linnaeus based his original description and which would very likely have been in his own collection, was apparently missing, which created a problem for taxonomists.