    Sentence 1: What were the fossils that  were found to represent ctenphores  missing that current ctenphora have?    Sentence 2: Despite their soft, gelatinous  bodies, fossils thought to represent  ctenophores, apparently with no tentacles  but many more comb-rows than modern  forms, have been found in lagerstatten as  far back as the early Cambrian, about 515  million years ago.    