code;spire;"aperture shape";"periostracal folds" Vn11-187;flat;elongated;normal 2011/66;"slightly elevated";rounded;pointed 2011/67;"flat/slightly elevated";rounded;pointed 2011/68;"slightly elevated";rounded;pointed 2011/70;"slightly elevated";rounded;OCMA 2011/72;"slightly elevated";rounded;normal 2011/73;"slightly elevated";rounded;OCMA 2011/75;"flat/slightly elevated";rounded;normal Vn09-16;"slightly elevated";rounded;OCMA Vn09-18;"slightly elevated";rounded;normal Vn09-19;"slightly elevated/ elevated";rounded;OCMA Vn09-24;"flat/slightly elevated";rounded;OCMA Vn10-128;"flat/slightly elevated";rounded;normal Vn10-129;"slightly elevated";rounded;normal Vn10-48;"flat/slightly elevated";rounded;OCMA Vn10-49;"flat/slightly elevated";rounded;pointed Vn10-53;flat;rounded;pointed Vn10-56;"flat/slightly elevated";rounded;pointed