%0 Journal Article %T THESIGNIFICANCEOFTHESINALFORMULAINDEVONIANANDPOST-DEVONIANSPIRIFERS %J µØÖÊѧ±¨ %D 1932 %X Recentstudy,hasbroughtoutthefactthatmembersoftheSpiriferidae,inwhichthesinusisplicated,aredivisibleintoaseriesofdistinctgronps,eachofwhichshowsadefiniteorderofappearanceoftheplicationsinthesinusofthepediclevalve. %U http://www.geojournals.cn/dzxb/ch/reader/view_abstract.aspx?file_no=19320111&flag=1