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There are currently 21 described species of Timema. There are also at least two undescribed taxa currently known, with more likely to be discovered pending further exploration. The figure here illustrates the male terminalia (in dorsal view), and the female subgenital plates (in ventral view) for all 21 currently described species.

Note that five species are parthenogenetic: T. douglasi, T. genevievae, T. monikense, T. shepardi, and T. tahoe. However, males have been found for (at least) two of those species (T. monikense & T. shepardi)...and their terminalia are illustrated in the figure.

The image here is slightly modified (i.e. with name emendations per (1)) from Fig. 29 on pg. 61 of:

Vickery, Vernon R. & Cristina P. Sandoval (2001). Description of three new species of Timema and Notes on Three Other Species. J. Orthoptera Res. 10 (1) 53:61
That paper was published by the Journal of Orthoptera Research which follows an open-access policy. The paper is freely available in either Full Text or PDF formats. Permission for usage here was generously granted by Cristina P. Sandoval.