Pleurolucina harperae sp. n. A–C Holotype NHMUK 20160338 exterior of right and interior of right and left valves L 8.8 mm. D–P Paratypes. NHMUK 20160339 dorsal view L 7.6 mm. E Exterior of left valve L 7.7 mm. F Interior of right valve L 6.3 mm. G Exterior of right valve L 7.9 mm. H Hinge area of right valve L 8.6 mm. I Exterior of left valve L 63 mm. J, K Interiors of right and left valves L 5.0 mm. L Dorsal view showing lunule. Scale bar = 0.5 mm. M, N Details of hinge teeth of J, K. O Protoconch. Scale bar = 100 µm. P Detail of microsculpture. Scale bar = 20 µm.