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Keywords from Image Description:
Boiotremus longitudinalis. Drawing of dorsal view and ventral view of the shell of Boiotremus longitudinalis Lindstrm synonyms Tremanotus longitudinalis Tremanotus incipiens Head region is on the left cite book On the Silurian Gastropoda and Pteropoda of Gotland Lindstrm Gustaf Lindstrm Stockholm archive org archive org page