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Jaekelopterus howelli. Genital operculum specimens. A: FMNH PE 61193, type A operculum. B: FMNH PE 61164, tip of type A appendage. C: Counterpart to FMNH PE 61164. D: PE 6179, type B operculum. E: Counterpart to FMNH PE 6179. F: FMNH PE 6180, type B operculum. G: Counterpart to FMNH PE 6180. Scale bars = 50 mm.
