FIGURE. 1 in A morphological re-study of three spinicaudatan species from the Middle-Upper Jurassic of Gansu Province, northwestern China

FIGURE. 1. Triglypta shandanensis (Chen in Zhang et al., 1976) emend. A–C, Focus-stacked images. D–F, SEM images. A, The holotype (NIGP 29776), external mould of an individual with two valves. B, The paratype (NIGP 29793), internal mould of a left valve, with some remains of the right valve. C, The paratype (NIGP 29777), internal mould of a left valve, with some remains of the right valve. D, SEM images of the same individual in Fig. 1C (NIGP 29777). E, F, growth bands near the antero-ventral margin of the carapace, ornamented by clustered puncta; clustered puncta with linear arrangements to form radial lirae. Scale bars = 1 mm in A–D, 100 μm in E and F.