Assertion: cephalopod's form | /r/HasProperty | straight and coiled shells
Facets:
Source sentences:
text: In the mid Tremadoc, these were supplemented by larger shells around 20 cm in length; these larger forms included straight and coiled shells, and fall into the orders Endocerida (with wide siphuncles) and Tarphycerida (with narrow siphuncles).